Draft California 2026 Integrated Report (303(d) List/305(b) Report)

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332407

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 1 of 6 samples exceeded the water quality threshold for pH.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332442

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 10 samples exceeded the water quality threshold for pH.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332462

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRFTD (San Joaquin Friant Dam).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332469

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the dates of 2019-09-05 and 2019-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332477

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRSKB (San Joaquin Skaggs Bridge).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332493

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332506

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 1 of 10 samples exceeded the water quality threshold for pH.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332368

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the dates of 2019-09-05 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330102

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-10 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330104

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330119

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332425

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for pH.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332375

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE505 (San Joaquin River at River Bottom Park).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332405

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2010-08-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342066

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342088

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the dates of 2019-09-05 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342064

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-05-19

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342094

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342068

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342072

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRFTD (San Joaquin Friant Dam).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342078

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342087

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the dates of 2019-09-05 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342086

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the dates of 2019-09-05 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342062

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-05-19

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342052

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2010-08-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342080

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342083

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the dates of 2019-09-05 and 2019-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342079

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342067

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342061

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-10 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342058

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRSKB (San Joaquin Skaggs Bridge).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342059

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX from the NWQMP for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-10 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342065

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Water Quality Control Plan for the Colorado River Basin Region (Includes amendments effective on or before March 30, 2019)

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342090

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX from the NWQMP for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342053

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342073

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRFTD (San Joaquin Friant Dam).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342070

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342051

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2010-08-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342081

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342050

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2010-08-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342074

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE505 (San Joaquin River at River Bottom Park).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342076

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE505 (San Joaquin River at River Bottom Park).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342089

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342071

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRFTD (San Joaquin Friant Dam).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342082

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342075

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE505 (San Joaquin River at River Bottom Park).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342093

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342091

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342054

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342055

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342057

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRSKB (San Joaquin Skaggs Bridge).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342056

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRSKB (San Joaquin Skaggs Bridge).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342085

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the dates of 2019-09-05 and 2019-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342063

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-05-19

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342092

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342069

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342060

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-10 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342084

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the dates of 2019-09-05 and 2019-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342077

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

70267

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

SWAMP data indicates that 5 of 12 sample results exceed the criterion for pH.

Data Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

pH should not be lower than 6.5 or higher than 8.5. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Data for this line of evidence was collected at 4 monitoring sites [ SJR at Friant Cove - 545FRE504, SJR at Lost Lake County Park - 545FRE502, SJR at Fort Washington Beach - 545FRE503, SJR at Wildwood Native park - 545MAD008]

Temporal Representation:

Data was collected over the time period 8/27/2008-9/3/2008.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

70266

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

SWAMP data indicates that 5 of 12 sample results exceed the criterion for pH.

Data Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

pH should not be lower than 6.5 or higher than 8.5. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Data was collected over the time period 8/27/2008-9/3/2008.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

70265

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

SWAMP data indicates that 5 of 12 sample results exceed the criterion for pH.

Data Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

pH should not be lower than 6.5 or higher than 8.5. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Temporal Representation:

Data was collected over the time period 8/27/2008-9/3/2008.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

210592

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD504)

Temporal Representation:

The samples were collected between the dates of 2019-05-23 and 2019-05-23

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

210207

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD012)

Temporal Representation:

The samples were collected between the dates of 2019-05-23 and 2019-05-23

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

211027

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Non-Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD504)

Temporal Representation:

The samples were collected between the dates of 2019-05-23 and 2019-05-23

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

210170

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD012)

Temporal Representation:

The samples were collected between the dates of 2019-05-23 and 2019-05-23

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

210172

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD504)

Temporal Representation:

The samples were collected between the dates of 2019-05-23 and 2019-05-23

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159191, pH	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

210645

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD012)

Temporal Representation:

The samples were collected between the dates of 2019-05-23 and 2019-05-23

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program


DECISION ID	159193	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Temperature, water
Final Listing Decision:	Do Not Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2020)
Revision Status	Revised
Sources:	A Source Unknown
TMDL Priority:	Low
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. One hundred seventeen lines of evidence are available in the administrative record to assess this pollutant. Of these lines of evidence 50 were based on continuous monitoring data and 67 were based on grab sample data. Continuous temperature data were used as the primary source of evidence for this assessment. A rolling 7-Day Average of Daily Maximum (7DADM) was calculated for all available data and a 7DADM is evaluated as a single sample. In the absence of natural or historical temperature data, the samples were compared against USEPA Region 10 recommended temperature requirements for each appropriate salmonid life stage present in the waterbody segment (Listing Policy Section 6.1.5.9). A total of 10,090 of 18,825 samples exceed the evaluation guideline (USEPA 2003) applied to protect the COLD freshwater habitat beneficial use. The evaluation guideline was applied during the juvenile rearing (16 degrees Celsius between March 15 - June 15) and the steelhead summer rearing (18 degrees Celsius between June 15 – September 15) life stages. A total of 6,488 of 21,247 samples exceed the evaluation guideline (USEPA 2003) applied to protect the migration (MIGR) freshwater habitat beneficial use. The evaluation guideline was applied during the smolt migration (20 degrees Celsius between March 15 – June 15) and adult migration (20 degrees Celsius between September 1 – December 31) salmonid life stages. A total of 6,231 of 7,863 samples exceed the evaluation guideline (USEPA 2003) applied to protect the spawning (SPAWN) freshwater habitat beneficial use. The evaluation guideline was applied during the spawning (13 degrees Celsius between October 1 – December 15) life stage. Grab sample temperature data were available for this waterbody but were not used for this assessment because they did not satisfy the spatial and temporal representation requirements of the Listing Policy (Sections 6.1.5.2 and 6.1.5.3). The data were insufficient to determine if temperature conditions experienced by aquatic life were within the optimal temperature range throughout the entire water column or the length of time temperature conditions may have exceeded the optimal temperature range. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Listing Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Listing Policy. 3. 10,090 of 18,825 samples exceed the COLD evaluation guideline for the 7DADM and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 6,488 of 21,247 samples exceed the MIGR evaluation guideline for the 7DADM and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 6,231 of 7,863 samples exceed the SPAWN evaluation guideline for the 7DADM and this exceeds the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be removed from the section 303(d) list because applicable water quality standards for the pollutant are being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

205605

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed NWIS data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Temperature.

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The natural receiving water temperature of intrastate waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Water Board that such alteration in temperature does not adversely affect beneficial uses (Sacramento-San Joaquin River Basin Plans.

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-364620120153701)

Temporal Representation:

The samples were collected between the dates of 2011-05-25 and 2011-05-25

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

205690

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed NWIS data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 18 samples exceeded the water quality threshold for Temperature.

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11252275)

Temporal Representation:

The samples were collected between the dates of 2011-03-16 and 2013-05-06

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

205855

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed NWIS data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Temperature.

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-364619120144701)

Temporal Representation:

The samples were collected between the dates of 2016-07-27 and 2017-01-12

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

205363

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11252975)

Temporal Representation:

The samples were collected between the dates of 2011-03-17 and 2017-01-10

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

205383

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed NWIS data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 5 samples exceeded the water quality threshold for Temperature.

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11253115)

Temporal Representation:

The samples were collected between the dates of 2011-03-29 and 2016-07-28

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206281

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11253115)

Temporal Representation:

The samples were collected between the dates of 2011-03-29 and 2016-07-28

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206340

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11252975)

Temporal Representation:

The samples were collected between the dates of 2011-03-17 and 2017-01-10

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206280

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-364619120144701)

Temporal Representation:

The samples were collected between the dates of 2016-07-27 and 2017-01-12

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206282

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11253058)

Temporal Representation:

The samples were collected between the dates of 2011-03-15 and 2016-07-26

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206318

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-364620120153701)

Temporal Representation:

The samples were collected between the dates of 2011-05-25 and 2011-05-25

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206497

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11252275)

Temporal Representation:

The samples were collected between the dates of 2011-03-16 and 2013-05-06

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206088

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-364619120144701)

Temporal Representation:

The samples were collected between the dates of 2016-07-27 and 2017-01-12

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206277

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11252275)

Temporal Representation:

The samples were collected between the dates of 2011-03-16 and 2013-05-06

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

205903

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11253058)

Temporal Representation:

The samples were collected between the dates of 2011-03-15 and 2016-07-26

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206159

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11253115)

Temporal Representation:

The samples were collected between the dates of 2011-03-29 and 2016-07-28

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

205983

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-364620120153701)

Temporal Representation:

The samples were collected between the dates of 2011-05-25 and 2011-05-25

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

205899

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11252975)

Temporal Representation:

The samples were collected between the dates of 2011-03-17 and 2017-01-10

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231094

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD012)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

230181

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD021)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231053

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 24 samples exceeded the water quality threshold for Temperature.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE502)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

230330

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD021)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231071

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE503)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231052

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 14 samples exceeded the water quality threshold for Temperature.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE504)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

230311

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE007)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

230439

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 9 of 17 samples exceeded the water quality threshold for Temperature.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545SJ0144)

Temporal Representation:

The samples were collected between the dates of 2011-05-18 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231072

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 8 samples exceeded the water quality threshold for Temperature.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD504)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231051

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 6 of 16 samples exceeded the water quality threshold for Temperature.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE020)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231050

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD012)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231049

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Migration

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 19 samples exceeded the water quality threshold for Temperature.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD008)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231090

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545SJ0144)

Temporal Representation:

The samples were collected between the dates of 2011-05-18 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231069

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE504)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231113

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE503)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231070

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD504)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231073

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE020)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231091

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE007)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231092

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD008)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

230144

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD021)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

230143

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545SJ0144)

Temporal Representation:

The samples were collected between the dates of 2011-05-18 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

230142

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE502)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231032

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE504)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231031

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE007)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231028

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE503)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231029

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD504)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231012

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD012)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231030

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE020)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

230573

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD008)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231093

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE502)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232849

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

2187

Number of Exceedances:

515

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRSC (SJR @ Sportsmens Club). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 515 of the 2187 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density salmon and trout juvenile rearing during the period of summer maximum temperatures (USEPA, 2003). This evaluation guideline was applied to both the smolt (March 15 - June 15) and adult (September 1 - December 31) migration periods.

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSC (SJR @ Sportsmens Club).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric.

Environmental Conditions:

QAPP Information:

The data were collected by the California Department of Fish and Wildlife as part of the San Joaquin River Restoration Project and are deemed by the CDFW to be reliable and of sound quality. Information about the monitoring equipment used is available in the reference.

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232797

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

131

Number of Exceedances:

126

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2012 through 2014 at station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 126 of the 131 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 13 degrees Celsius is recommended by the USEPA for waterbodies used or potentially used for salmonid spawning, egg incubation, and fry emergence. USEPA recommends that this criterion be applied from the average date that spawning begins to the average data incubation ends (USEPA, 2003). This evaluation guideline was applied during the spawning period (October 1 - December 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2012 through 2014. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232836

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

1191

Number of Exceedances:

815

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRLL (SJR @ Lost Lake). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 815 of the 1191 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRLL (SJR @ Lost Lake).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232862

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

608

Number of Exceedances:

561

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2011 through 2019 at station SJRSM (SJR @ San Mateo). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 561 of the 608 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 16 degrees Celsius is recommended by the USEPA for waterbodies that are used for high density summertime salmonid juvenile rearing to protect juvenile salmonids from lethal temperatures and to provide upper optimal conditions for juvenile growth under limited food during the period of summer maximum temperatures and optimal temperatures for other times of the growth season (USEPA, 2003). This evaluation guideline was applied during the juvenile rearing period (March 15 - June 15)

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSM (SJR @ San Mateo).

Temporal Representation:

Data collected hourly from 2011 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232810

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

717

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRFB (SJR @ Friant Bridge). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 0 of the 717 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRFB (SJR @ Friant Bridge).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232796

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

166

Number of Exceedances:

149

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 149 of the 166 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2017 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232824

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

222

Number of Exceedances:

159

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRGF2 (SJR @ Gravely Ford). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 159 of the 222 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF2 (SJR @ Gravely Ford).

Temporal Representation:

Data collected hourly from 2017 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232811

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

2384

Number of Exceedances:

111

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRFB (SJR @ Friant Bridge). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 111 of the 2384 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRFB (SJR @ Friant Bridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232812

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

1052

Number of Exceedances:

672

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRFB (SJR @ Friant Bridge). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 672 of the 1052 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRFB (SJR @ Friant Bridge).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232793

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

279

Number of Exceedances:

191

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2012 through 2014 at station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 191 of the 279 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2012 through 2014. Data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232826

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

133

Number of Exceedances:

111

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRGF2 (SJR @ Gravely Ford). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 111 of the 133 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF2 (SJR @ Gravely Ford).

Temporal Representation:

Data collected hourly from 2017 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232819

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

530

Number of Exceedances:

441

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2008 through 2016 at station SJRGF1 (SJR @ Gravely Ford). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 441 of the 530 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF1 (SJR @ Gravely Ford).

Temporal Representation:

Data collected hourly from 2008 through 2016. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232802

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

174

Number of Exceedances:

173

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 173 of the 174 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2017 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232832

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

3091

Number of Exceedances:

155

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRLL (SJR @ Lost Lake). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 155 of the 3091 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRLL (SJR @ Lost Lake).

Temporal Representation:

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232837

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1329

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRLL (SJR @ Lost Lake). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 65 of the 1329 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRLL (SJR @ Lost Lake).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232798

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

174

Number of Exceedances:

174

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2012 through 2014 at station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 174 of the 174 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2012 through 2014. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232850

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

742

Number of Exceedances:

633

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRSC (SJR @ Sportsmens Club). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 633 of the 742 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSC (SJR @ Sportsmens Club).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232800

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

372

Number of Exceedances:

195

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 195 of the 372 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2017 through 2019. Data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232792

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2012 through 2014 at station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 93 of the 93 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2012 through 2014. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232805

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1025

Number of Exceedances:

215

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2007 through 2019 at station SJRWU (SJR @ Willow Unit). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 215 of the 1025 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRWU (SJR @ Willow Unit).

Temporal Representation:

Data collected hourly from 2007 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232838

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1055

Number of Exceedances:

675

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2007 through 2019 at station SJRMU (SJR @ Milburn Unit). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 675 of the 1055 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRMU (SJR @ Milburn Unit).

Temporal Representation:

Data collected hourly from 2007 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232868

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

555

Number of Exceedances:

555

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2011 through 2019 at station SJRSM (SJR @ San Mateo). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 555 of the 555 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSM (SJR @ San Mateo).

Temporal Representation:

Data collected hourly from 2011 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232809

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

744

Number of Exceedances:

688

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRCP (SJR @ Camp Pashayan). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 688 of the 744 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCP (SJR @ Camp Pashayan).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232787

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

597

Number of Exceedances:

513

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRSP (SJR @ Skaggs Park). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 513 of the 597 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSP (SJR @ Skaggs Park).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232804

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

897

Number of Exceedances:

717

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2007 through 2019 at station SJRWU (SJR @ Willow Unit). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 717 of the 897 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRWU (SJR @ Willow Unit).

Temporal Representation:

Data collected hourly from 2007 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232843

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

800

Number of Exceedances:

681

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2007 through 2019 at station SJRMU (SJR @ Milburn Unit). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 681 of the 800 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRMU (SJR @ Milburn Unit).

Temporal Representation:

Data collected hourly from 2007 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232831

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1248

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRLL (SJR @ Lost Lake). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 29 of the 1248 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRLL (SJR @ Lost Lake).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232803

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

2334

Number of Exceedances:

207

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2007 through 2019 at station SJRWU (SJR @ Willow Unit). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 207 of the 2334 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRWU (SJR @ Willow Unit).

Temporal Representation:

Data collected hourly from 2007 through 2019. Data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232866

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

1120

Number of Exceedances:

755

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2011 through 2019 at station SJRSM (SJR @ San Mateo). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 755 of the 1120 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSM (SJR @ San Mateo).

Temporal Representation:

Data collected hourly from 2011 through 2019. Data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232848

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

991

Number of Exceedances:

481

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRSC (SJR @ Sportsmens Club). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 481 of the 991 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSC (SJR @ Sportsmens Club).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232808

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

639

Number of Exceedances:

539

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRCP (SJR @ Camp Pashayan). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 539 of the 639 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCP (SJR @ Camp Pashayan).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232844

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1117

Number of Exceedances:

1043

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2007 through 2019 at station SJRMU (SJR @ Milburn Unit). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 1043 of the 1117 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRMU (SJR @ Milburn Unit).

Temporal Representation:

Data collected hourly from 2007 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232856

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

1802

Number of Exceedances:

672

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRSCI (SJR @ Scout Island). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 672 of the 1802 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSCI (SJR @ Scout Island).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232867

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

337

Number of Exceedances:

296

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2011 through 2019 at station SJRSM (SJR @ San Mateo). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 296 of the 337 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSM (SJR @ San Mateo).

Temporal Representation:

Data collected hourly from 2011 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232830

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

186

Number of Exceedances:

174

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRGF2 (SJR @ Gravely Ford). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 174 of the 186 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF2 (SJR @ Gravely Ford).

Temporal Representation:

Data collected hourly from 2017 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232825

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

426

Number of Exceedances:

223

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRGF2 (SJR @ Gravely Ford). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 223 of the 426 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF2 (SJR @ Gravely Ford).

Temporal Representation:

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232860

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

671

Number of Exceedances:

569

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRSCI (SJR @ Scout Island). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 569 of the 671 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSCI (SJR @ Scout Island).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232854

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1050

Number of Exceedances:

744

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRSC (SJR @ Sportsmens Club). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 744 of the 1050 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSC (SJR @ Sportsmens Club).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232818

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

1591

Number of Exceedances:

917

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2008 through 2016 at station SJRGF1 (SJR @ Gravely Ford). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 917 of the 1591 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF1 (SJR @ Gravely Ford).

Temporal Representation:

Data collected hourly from 2008 through 2016. Data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232791

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

510

Number of Exceedances:

451

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRSP (SJR @ Skaggs Park). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 451 of the 510 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSP (SJR @ Skaggs Park).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232814

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

768

Number of Exceedances:

573

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2008 through 2016 at station SJRGF1 (SJR @ Gravely Ford). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 573 of the 768 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF1 (SJR @ Gravely Ford).

Temporal Representation:

Data collected hourly from 2008 through 2016. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332933

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-05-19

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330500

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for Temperature.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-10 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330453

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the water quality threshold for Temperature.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330465

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Temperature.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330478

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

QAPP for USGS Data Collected during the 2026 Integrated Report Cycle

Spatial Representation:

The samples were collected at 1 monitoring site: USGS-11251000 (SAN JOAQUIN R BL FRIANT CA).

Temporal Representation:

The samples were collected between the dates of 2014-09-10 and 2014-09-10

Environmental Conditions:

QAPP Information:

QAPP for USGS Data Collected during the 2026 Integrated Report Cycle

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332937

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the dates of 2019-07-08 and 2019-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332948

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 2 of 5 samples exceeded the water quality threshold for Temperature.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332949

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 13 samples exceeded the water quality threshold for Temperature.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332957

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2010-08-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332959

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Southern San Joaquin Water Quality Coalition data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 27 samples exceeded the water quality threshold for Temperature.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

QAPP Reference for Irrigated Lands Regulatory Program

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRFTD (San Joaquin Friant Dam).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332961

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Southern San Joaquin Water Quality Coalition data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 8 of 27 samples exceeded the water quality threshold for Temperature.

Data Reference:

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

QAPP Reference for Irrigated Lands Regulatory Program

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRSKB (San Joaquin Skaggs Bridge).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332979

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 4 of 5 samples exceeded the water quality threshold for Temperature.

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE505 (San Joaquin River at River Bottom Park).

Temporal Representation:

The samples were collected between the dates of 2021-05-25 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332991

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332903

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Temperature.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332925

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332928

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 6 of 12 samples exceeded the water quality threshold for Temperature.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the dates of 2019-07-08 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

70280

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

SWAMP data indicates that 12 sample results exceed the evaluation guideline value for Water Temperature.

Data Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Inland Fishes of California (1976)

Spatial Representation:

Temporal Representation:

Data was collected over the time period 8/27/2008-9/3/2008.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

The SWAMP QAMP (2002) was used for data before Septemper 1, 2008 and SWAMP QAPP (2008) was thereafter.

QAPP Information Reference(s):

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

205382

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-11253058)

Temporal Representation:

The samples were collected between the dates of 2011-03-15 and 2016-07-26

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232799

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

949

Number of Exceedances:

199

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2007 through 2019 at station SJRWU (SJR @ Willow Unit). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 199 of the 949 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRWU (SJR @ Willow Unit).

Temporal Representation:

Data collected hourly from 2007 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232806

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

866

Number of Exceedances:

500

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRCP (SJR @ Camp Pashayan). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 500 of the 866 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCP (SJR @ Camp Pashayan).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232807

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

1817

Number of Exceedances:

746

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRCP (SJR @ Camp Pashayan). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 746 of the 1817 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCP (SJR @ Camp Pashayan).

Temporal Representation:

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232861

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

799

Number of Exceedances:

682

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRSCI (SJR @ Scout Island). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 682 of the 799 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSCI (SJR @ Scout Island).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232785

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

696

Number of Exceedances:

456

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRSP (SJR @ Skaggs Park). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 456 of the 696 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSP (SJR @ Skaggs Park).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232801

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

143

Number of Exceedances:

118

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the salmonid spawning period, October 1 through December 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 118 of the 143 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2017 through 2019. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232820

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

837

Number of Exceedances:

816

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2008 through 2016 at station SJRGF1 (SJR @ Gravely Ford). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 816 of the 837 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF1 (SJR @ Gravely Ford).

Temporal Representation:

Data collected hourly from 2008 through 2016. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232786

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

1542

Number of Exceedances:

775

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRSP (SJR @ Skaggs Park). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 775 of the 1542 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSP (SJR @ Skaggs Park).

Temporal Representation:

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232813

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1172

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2002 through 2019 at station SJRFB (SJR @ Friant Bridge). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 16 of the 1172 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRFB (SJR @ Friant Bridge).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232855

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

774

Number of Exceedances:

419

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRSCI (SJR @ Scout Island). The data was provided by staff at the San Joaquin River Restoration Project. Only Data from the juvenile rearing period, March 15 through June 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 419 of the 774 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSCI (SJR @ Scout Island).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 159193, Temperature, water	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232842

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

2302

Number of Exceedances:

1026

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2007 through 2019 at station SJRMU (SJR @ Milburn Unit). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 1026 of the 2302 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRMU (SJR @ Milburn Unit).

Temporal Representation:

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.


DECISION ID	167528	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Ammonia
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 167528, Ammonia	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329681

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.

Data Reference:

WQX from the NWQMP for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The Total Ammonia criterion continuous concentration (expressed as a 30-day average) to protect aquatic life in freshwater is Temperature and pH dependent, and was calculated according to the formula listed in the Aquatic Life Ambient Water Quality Criteria for Ammonia Freshwater 2013 document.

Objective/Criterion Reference:

Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 167528, Ammonia	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329682

Pollutant:

Nitrogen, ammonia (Total Ammonia)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Ammonia as N.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Aquatic Life Ambient Water Quality Criteria for Ammonia - Freshwater 2013

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-08-06 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Contaminants in Fish from California Lakes and Reservoirs: Technical Report on Year One of a Two-Year Screening Survey. A Report of the Surface Water Ambient Monitoring Program (SWAMP). California State Water Resources Control Board, Sacramento, CA


DECISION ID	164714	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Chlordane
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164714, Chlordane	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79383

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

One composite fish tissue sample was assessed. The composite sample consisted of fillets from 5 common carp. Details of the compositing protocol can be found in the March 2009 report entitled: "Contaminants in Fish from California Lakes and Reservoirs: Technical Report on Year One of a Two-Year Screening Study" (SWAMP, 2009).

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

No individual pesticide or combination of pesticides shall be present in concentrations that adversely affect beneficial uses. Discharges shall not result in pesticide concentrations in bottom sediments or aquatic life that adversely affect beneficial uses. (Water Quality Control Plan, Central Valley Region, Sacramento River and San Joaquin River Basins)

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum total Chlordane concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data for San Joaquin River (Friant Dam to Mendota Pool) was collected at one monitoring site [ 545TU0164-BOG Other Lake 164 - 545TU0164]. Samples were collected from one location. Individual sample locations consisted of an area within a waterbody from which fish tissue samples were collected. The number of sample locations per waterbody was based on the size of the waterbody (SWAMP, 2010). Specifics of individual sampling locations can be found in the supplemental report entitled "Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007-March 2008" (SWAMP, 2008).

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

Samples were collected, processed, and analyzed in accordance with the methods described in Quality Assurance Project Plan "Screening Study of Bioaccumulation in California Lakes and Reservoirs." (SWAMP, 2008).

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments

Line of Evidence (LOE) for Decision ID 164714, Chlordane	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79392

Pollutant:

Chlordane

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for total chlordane in fish tissue is 3.9 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of one is applied for skin-off.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data for San Joaquin River (Friant Dam to Mendota Pool) was collected at one monitoring site [ 545TU0164-BOG Other Lake 164 - 545TU0164]. Specifics of individual sampling locations can be found in the supplemental report entitled "Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007-March 2008" (SWAMP, 2008).

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	159189	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Chloride
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 159189, Chloride	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329808

Pollutant:

Chloride

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for Chloride. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

WQX from the NWQMP for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The California Secondary MCL that is incorporated by reference into the Water Quality Control Plan for the Sacramento and San Joaquin River Basins specifies a range for chloride of 250-500 mg/L assessed as an annual average.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-08-06 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159189, Chloride	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329784

Pollutant:

Chloride

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for Chloride. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Habitat, Water data for the 2020/2022 integrated report in Region 5.

Line of Evidence (LOE) for Decision ID 159189, Chloride	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346223

Pollutant:

Chloride

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed DFW_ABL_Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for Chloride. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545CR1002 (San Joaquin River -1002).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159189, Chloride	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329757

Pollutant:

Chloride

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for Chloride. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

WQX from the NWQMP for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008


DECISION ID	169243	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	DDT (Dichlorodiphenyltrichloroethane)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Previous cycle Total DDT LOEs for this waterbody-pollutant combination were reviewed and merged with a DDT decision. Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 169243, DDT (Dichlorodiphenyltrichloroethane)	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79389

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum total DDT concentration of 1,000 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments

Line of Evidence (LOE) for Decision ID 169243, DDT (Dichlorodiphenyltrichloroethane)	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79402

Pollutant:

Total DDT (sum of 4,4'- and 2,4'- isomers of DDT, DDE, and DDD)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for total DDT in fish tissue is 15 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of one is applied for skin-off.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	164716	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Dieldrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164716, Dieldrin	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79384

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum Dieldrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments

Line of Evidence (LOE) for Decision ID 164716, Dieldrin	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79393

Pollutant:

Dieldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

One composite fish tissue sample was assessed. The composite sample consists of fillets from 5 common carp. Details of the compositing protocol can be found in the March 2009 report entitled: "Contaminants in Fish from California Lakes and Reservoirs: Technical Report on Year One of a Two-Year Screening Study" (SWAMP, 2009).One composite (5 fish per composite) was generated from one species: common carp. Details of the compositing protocol can be found in the March 2009 report entitled: "Contaminants in Fish from California Lakes and Reservoirs: Technical Report on Year One of a Two-Year Screening Study" (SWAMP, 2009). One sample was not used in the assessment because the laboratory data reporting limit(s) was above the objective and therefore the results could not be quantified with the level of certainty required by the Listing Policy.

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for dieldrin in fish tissue is 0.32 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of one is applied for skin-off fillets.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	164717	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Endrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164717, Endrin	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79394

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for endrin in fish tissue is 660 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day. A cooking reduction factor of one is applied for skin-off.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Guidance for Assessing Chemical Contaminant Data for Use In Fish Advisories Volume 1: Fish Sampling and Analysis

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments

Line of Evidence (LOE) for Decision ID 164717, Endrin	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79385

Pollutant:

Endrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum Endrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	164718	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Heptachlor epoxide
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164718, Heptachlor epoxide	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79395

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for heptachlor epoxide in fish tissue is 0.93 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of one is applied for skin-off fillets.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Public Health Goal for Heptachlor and Heptachlor Epoxide in Drinking Water

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments

Line of Evidence (LOE) for Decision ID 164718, Heptachlor epoxide	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79387

Pollutant:

Heptachlor epoxide

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum Heptachlor Epoxide concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	164719	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Hexachlorobenzene/ HCB
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164719, Hexachlorobenzene/ HCB	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79396

Pollutant:

Hexachlorobenzene/ HCB

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for hexachlorobenzene in fish tissue is 2.8 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of one is applied for skin-off.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	165322	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Indicator Bacteria
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2020)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Twenty-seven lines of evidence are available in the administrative record to assess this pollutant. Historical bacteria LOEs (pre-2010 data) have been removed and data has been compared to the newer E. coli bacteria water quality objective. Zero of the 93 samples, expressed as a Geomean, and three of the 184 samples, expressed as a Statistical Threshold Value, exceed the objective for REC-1. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 93 samples, expressed as a Geomean, and three of the 184 samples, expressed as a Statistical Threshold Value, exceed the objective for REC-1. This does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329512

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 11 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The bacteria water quality objective to protect the REC-1 beneficial use where the salinity is less than 1 parts per thousand 95 percent or more of the time applies a statistical threshold value to E. coli of 320 cfu/100 mL, not to be exceeded by more than 10 percent of samples within a calendar month (ISWEBE 2018).

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the days of 2010-08-30 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329458

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 14 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The bacteria water quality objective to protect the REC-1 beneficial use for waters where the salinity is equal to or less than 1 part per thousand 95 percent or more of the time applies a rolling six-week geometric mean of E. coli, not to exceed 100 cfu/100 mL (ISWEBE 2018).

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2019-09-26 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329480

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 9 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2019-09-26 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329500

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE505 (San Joaquin River at River Bottom Park).

Temporal Representation:

The samples were collected between the days of 2021-05-19 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329503

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 5 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 551FRE150 (San Joaquin River at Scout Island Downstream).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2018-09-26 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329467

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 6 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329456

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 10 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329511

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 1 of the 10 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329497

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the days of 2010-08-30 and 2010-08-30 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329481

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the days of 2010-08-30 and 2010-08-30 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329462

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 14 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the days of 2010-08-30 and 2019-09-26 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329493

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the days of 2010-08-30 and 2019-09-26 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

194869

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 19 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The bacteria water quality objective applicable to all waters, except Lake Tahoe, where the salinity is less than 10 parts per thousand (ppth) 95 percent or more of the time is a STATISTICAL THRESHOLD VALUE (STV) of 320 cfu/100 mL not to be exceeded more than 10 percent of the time (calculated monthly).

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE502

Temporal Representation:

The samples were collected between the days of 2010-09-14 and 2019-07-08 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

194639

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 16 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE504

Temporal Representation:

The samples were collected between the days of 2011-08-03 and 2014-09-29 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

194834

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 21 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE503

Temporal Representation:

The samples were collected between the days of 2010-09-14 and 2019-07-08 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

194919

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 20 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE020

Temporal Representation:

The samples were collected between the days of 2010-09-14 and 2014-09-29 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

194641

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD012

Temporal Representation:

The samples were collected between the days of 2019-07-08 and 2019-07-08 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

194612

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD504

Temporal Representation:

The samples were collected between the days of 2019-07-08 and 2019-07-08 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

194928

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 1 of the 20 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD008

Temporal Representation:

The samples were collected between the days of 2010-09-14 and 2014-09-29 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329513

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 3 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the days of 2010-08-30 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329454

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 13 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329459

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 14 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329452

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 14 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the days of 2010-08-30 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

194805

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 18 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545SJ0144

Temporal Representation:

The samples were collected between the days of 2011-06-01 and 2014-09-29 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329460

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

GeoMean

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 14 samples exceeded the geomean water quality threshold for E. coli. This is a six week rolling geomean that is calculated weekly.

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 551FRE150 (San Joaquin River at Scout Island Downstream).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2018-09-26 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329492

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

STV

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 6 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the days of 2018-05-24 and 2021-05-19 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

Line of Evidence (LOE) for Decision ID 165322, Indicator Bacteria	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

197121

Pollutant:

Escherichia coli (E. coli)

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PATHOGEN MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 5 samples exceeded the Statistical Threshold Value (STV) water quality threshold for E. coli. The STV is based on a 10% exceedance rate that is calculated monthly.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site(s), station(s): 545MAD011

Temporal Representation:

The samples were collected between the days of 2011-05-18 and 2011-09-14 .

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program


DECISION ID	164720	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Lindane/gamma Hexachlorocyclohexane (gamma-HCH)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164720, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79397

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for lindane in fish tissue is 4.6 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of one is applied for skin-off.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Air Toxics Hotspots Program Risk Assessment Guidelines. Part ll Technical Support Document for Describing Available Cancer Potency Values.

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments

Line of Evidence (LOE) for Decision ID 164720, Lindane/gamma Hexachlorocyclohexane (gamma-HCH)	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79388

Pollutant:

Lindane/gamma Hexachlorocyclohexane (gamma-HCH)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum Lindane concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Data for San Joaquin River (Friant Dam to Mendota Pool) was collected at [ 545TU0164-BOG Other Lake 164 - 545TU0164]. Samples were collected from one location. Individual sample locations consisted of an area within a waterbody from which fish tissue samples were collected. The number of sample locations per waterbody was based on the size of the waterbody (SWAMP, 2010). Specifics of individual sampling locations can be found in the supplemental report entitled "Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007-March 2008" (SWAMP, 2008).

Temporal Representation:

Data was collected on 8/30/2007

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	169310	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Mercury
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2020)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	LOEs for this waterbody-pollutant combination from previous cycles were reviewed, determined to be inaccurate, and removed. Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 169310, Mercury	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

223453

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Wildlife Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP Sportfish Contamination in Lakes and Resrv data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Mercury. All fish collected between February and July of the same calendar year with a reported length of 50-150 mm were averaged into a single sample, independent or species of trophic level, for comparison with the objective. This LOE consists of a total of 17 fish, which were aggregated into 1 annual averages, consisting of 2 fish species (1 composite(s) of Sculpin each composed of 7 fish per composite, 1 composite(s) of Bluegill each composed of 10 fish per composite).

Data Reference:

Habitat, Sediment, Tissue, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins)

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The Statewide Prey Fish Water Quality Objective for the protection of Wildlife Habitat comes from the Statewide Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California, and is 0.05 mg/Kg wet weight whole fish samples of any fish species between 50 to 150 mm in total length collected between February 1 and July 31. (SWRCB Resolution No. 2017-0027)

Guideline Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Spatial Representation:

Data was collected from 1 station(s) with the station code(s): 545TU0164.

Temporal Representation:

Data for this line of evidence were collected between 2016-04-13 and 2016-04-13. When composited fish were collected over multiple days, the first day of fish collection was used as the sample date in the LOE, both for LOE writing, and for averaging period purposes.

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 169310, Mercury	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

223562

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP Sportfish Contamination in Lakes and Resrv data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Mercury. This LOE contains data only for trophic level 4 fish. The concentration of Mercury in fish collected within the same calendar year, for the same trophic level were averaged into a single sample for comparison with the objective. A total of 12 fish were aggregated into 1 annual averages, which consisted of 1 fish species (12 composite(s) of Largemouth Bass each composed of 1 fish per composite). This LOE does not contain data from fish who's average length was outside of the legal size limits as described by the California Department of Fish and Wildlife Fishing Regulations.

Data Reference:

Habitat, Sediment, Tissue, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The Statewide Sport Fish Water Quality Objective for the protection of the Commercial and Sport Fishing beneficial comes from the Statewide Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California, and is 0.2 mg/Kg wet weight skinless fillet samples of trophic level 3, or trophic level 4 fish (whichever is highest in the water body) over a one year averaging period. Trophic levels of applicable fish are defined in, but not limited to those in Attachment C of the Final Regulatory Language document (Appendix A) of State Water Resources Control Board Resolution No. 2017-0027.

Guideline Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Spatial Representation:

Data was collected from 1 station(s) with the station code(s): 545TU0164.

Temporal Representation:

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 169310, Mercury	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

223636

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Wildlife Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP Sportfish Contamination in Lakes and Resrv data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Mercury. This LOE contains data only for trophic level 4 fish. The concentration of Mercury in fish collected within the same calendar year, for the same trophic level were averaged into a single sample for comparison with the objective. A total of 12 fish were aggregated into 1 annual averages, which consisted of 1 fish species (12 composite(s) of Largemouth Bass each composed of 1 fish per composite). This LOE does not contain data from fish who's average length was outside of the legal size limits as described by the California Department of Fish and Wildlife Fishing Regulations.

Data Reference:

Habitat, Sediment, Tissue, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The Statewide Sport Fish Water Quality Objective for the protection of Wildlife Habitat comes from the Statewide Water Quality Control Plan for Inland Surface Waters, Enclosed Bays, and Estuaries of California, and is 0.2 mg/Kg wet weight skinless fillet samples of trophic level 3, or trophic level 4 fish (whichever is highest in the water body) over a one year averaging period. If trophic level 3 fish are used in the assessment then the Prey Fish Water Quality Objective must also be used to determine that the Sport Fish Objective is being met. Trophic levels of applicable fish are defined in, but not limited to those in Attachment C of the Final Regulatory Language document (Appendix A) of State Water Resources Control Board Resolution No. 2017-0027.

Guideline Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Spatial Representation:

Data was collected from 1 station(s) with the station code(s): 545TU0164.

Temporal Representation:

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 169310, Mercury	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

226057

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP Sportfish Contamination in Lakes and Resrv data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Mercury. This LOE contains data only for trophic level 4 fish. The concentration of Mercury in fish collected within the same calendar year, for the same trophic level were averaged into a single sample for comparison with the objective. A total of 11 fish were aggregated into 1 annual averages, which consisted of 1 fish species (11 composite(s) of Largemouth Bass each composed of 1 fish per composite). This LOE does not contain data from fish who's average length was outside of the legal size limits as described by the California Department of Fish and Wildlife Fishing Regulations.

Data Reference:

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Spatial Representation:

Data was collected from 1 station(s) with the station code(s): 545TU0164.

Temporal Representation:

Data for this line of evidence were collected between 2007-08-30 and 2007-08-30. When composited fish were collected over multiple days, the first day of fish collection was used as the sample date in the LOE, both for LOE writing, and for averaging period purposes.

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 169310, Mercury	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

226161

Pollutant:

Mercury

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Wildlife Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP Sportfish Contamination in Lakes and Resrv data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the water quality threshold for Mercury. This LOE contains data only for trophic level 4 fish. The concentration of Mercury in fish collected within the same calendar year, for the same trophic level were averaged into a single sample for comparison with the objective. A total of 11 fish were aggregated into 1 annual averages, which consisted of 1 fish species (11 composite(s) of Largemouth Bass each composed of 1 fish per composite). This LOE does not contain data from fish who's average length was outside of the legal size limits as described by the California Department of Fish and Wildlife Fishing Regulations.

Data Reference:

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

Guideline Reference:

Inland Surface Waters, Enclosed Bays, and Estuaries Plan. Part 1: Trash Provisions; Part 2: Tribal Subsistence Beneficial Uses and Mercury Provisions; Part 3: Bacteria Provisions and Variance Policy

Spatial Representation:

Data was collected from 1 station(s) with the station code(s): 545TU0164.

Temporal Representation:

Environmental Conditions:

QAPP Information:

Quality Assurance Program Plan and Standard Operating Procedures for SWAMP program

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program


DECISION ID	164721	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Mirex
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164721, Mirex	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79399

Pollutant:

Mirex

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for mirex in fish tissue is 0.28 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day. A cooking reduction factor of one is applied for skin-off fillets.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Expedited Cancer Potency Values and Proposed Regulatory Levels for Certain Proposition 65 Carcinogens.

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	168894	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Nitrogen, Nitrite
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 168894, Nitrogen, Nitrite	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

329983

Pollutant:

Nitrogen, Nitrite

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX from the NWQMP for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The California Primary Maximum Contaminant Level for Nitrite as N incorporated by reference in the Water Quality Control Plan for the Sacramento and San Joaquin River Basins is 1000 ug/L .

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-10 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5


DECISION ID	159190	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Oxygen, Dissolved
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2020)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the Clean Water Act (CWA) section 303(d) List under section 3.2 of the Listing Policy. A total of 50 lines of evidence are available in the administrative record to assess this pollutant. Three of 198 samples exceed the water quality objective for the cold freshwater habitat beneficial use and three of 198 samples exceed the water quality objective for the fish spawning beneficial use. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Three of 198 samples exceed the water quality objective for the cold freshwater habitat beneficial use and three of 198 samples exceed the water quality objective for the fish spawning beneficial use. This does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332252

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332250

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332039

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the dates of 2019-07-08 and 2019-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330047

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330011

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330020

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-10 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332195

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 1 of 14 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the dates of 2019-07-08 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332213

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332254

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 15 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332116

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-05-19

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332121

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2010-08-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332138

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332142

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE505 (San Joaquin River at River Bottom Park).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332149

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332161

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the dates of 2019-07-08 and 2019-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332167

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Southern San Joaquin Water Quality Coalition data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 2 of 26 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRFTD (San Joaquin Friant Dam).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332171

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Southern San Joaquin Water Quality Coalition data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRSKB (San Joaquin Skaggs Bridge).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332036

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330012

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330021

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-10 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330025

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332222

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE505 (San Joaquin River at River Bottom Park).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332211

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332049

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Southern San Joaquin Water Quality Coalition data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 26 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRSKB (San Joaquin Skaggs Bridge).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332210

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the dates of 2019-07-08 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208453

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE503)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208459

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE504)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2011-07-29

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208531

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD008)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2011-06-15

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208482

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD504)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208481

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545SJ0144)

Temporal Representation:

The samples were collected between the dates of 2011-06-15 and 2011-06-15

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208908

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE502)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208430

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE020)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2011-06-15

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208586

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545SJ0144)

Temporal Representation:

The samples were collected between the dates of 2011-06-15 and 2011-06-15

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208977

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD012)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208846

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD021)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208951

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE007)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208855

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD504)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

207951

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD008)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2011-06-15

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208788

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE504)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2011-07-29

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208902

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD012)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208511

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE007)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

207952

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545MAD021)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208422

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE503)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

208579

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE502)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

209037

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as SPWN is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE020)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2011-06-15

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332231

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332239

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-05-19

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332243

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2010-08-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332244

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Southern San Joaquin Water Quality Coalition data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 2 of 26 samples exceeded the water quality threshold for Oxygen, Dissolved.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRFTD (San Joaquin Friant Dam).

Temporal Representation:

The samples were collected between the dates of 2010-09-20 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 159190, Oxygen, Dissolved	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332125

Pollutant:

Oxygen, Dissolved

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The minimum dissolved oxygen concentration for waters designated as COLD is 7.0 mg/L. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin Basin)

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008


DECISION ID	164722	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	PCBs (Polychlorinated biphenyls)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164722, PCBs (Polychlorinated biphenyls)	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79400

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for polychlorinated biphenyls in fish tissue is 2.6 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day for a 30 year exposure over a 70-year lifetime. This constituent is a carcinogen therefore the risk level is set to one in a million. A cooking reduction factor of one is applied for skin-off.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments

Line of Evidence (LOE) for Decision ID 164722, PCBs (Polychlorinated biphenyls)	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79390

Pollutant:

PCBs (Polychlorinated biphenyls)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum total PCB concentration of 500 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	164723	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Selenium
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2020)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164723, Selenium	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79401

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

One composite fish tissue sample, consisting of fillets from 5 common carp, was assessed. Details of the compositing protocol can be found in the March 2009 report entitled: "Contaminants in Fish from California Lakes and Reservoirs: Technical Report on Year One of a Two-Year Screening Study" (SWAMP, 2009).

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. (Water Quality Control Plan, Central Valley Region, Sacramento River Basin and San Joaquin River Basin)

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The OEHHA Fish Contaminant Goal for selenium in fish tissue is 7.4 ppm. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day. A bacKground dietary consumption rate of 0.114 mg/day is applied for this micronutrient.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data for this line of evidence for San Joaquin River (Friant Dam to Mendota Pool) was collected at one monitoring site [ 545TU0164-BOG Other Lake 164 - 545TU0164]. Samples were collected from one location. Individual sample locations consisted of an area within a given waterbody from which fish tissue samples were collected. The number of sample locations per waterbody was based on the overall size of the waterbody (SWAMP, 2010). Specifics of individual sampling locations can be found in the supplemental report entitled "Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007-March 2008" (SWAMP, 2008).

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments

Line of Evidence (LOE) for Decision ID 164723, Selenium	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

195572

Pollutant:

Selenium

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Habitat, Sediment, Tissue, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The OEHHA Fish Contaminant Goal for selenium in fish tissue is 7.4 ppm. This screening level assumes an average body weight of 70 kg and a consumption rate of 32 g/day. A background dietary consumption rate of 0.114 mg/day is applied for this micronutrient. (Klasing, S., and R. Brodberg, 2008)

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Spatial Representation:

Data was collected from 1 station(s) with the station code(s): 545TU0164.

Temporal Representation:

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program


DECISION ID	165488	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Specific Conductivity
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2020)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Thirty-seven lines of evidence are available in the administrative record to assess this pollutant. Four of the 56 samples exceed the upper limit of the objective range for MUN. Zero of the 56 samples fall within the objective range for MUN. Fifty-two of the 56 samples are below the objective range for MUN. Zero of the four samples exceed the objective for COLD. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Four of the 56 samples exceed the upper limit of the objective range for MUN. Zero of the 56 samples fall within the objective range for MUN. Fifty-two of the 56 samples are below the objective range for MUN. Zero of the four samples exceed the objective for COLD. This does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346594

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 2 samples fall within the range, and 2 of 2 samples fall below the threshold.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The California Secondary MCL that is incorporated by reference into the Water Quality Control Plan for the Sacramento and San Joaquin River Basins specifies a range for specific conductance of 900-1600 uS/cm assessed as an annual average.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the dates of 2018-09-20 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332774

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the dates of 2021-07-28 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332842

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330287

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed USGS California Water Science Center data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: USGS-11251000 (SAN JOAQUIN R BL FRIANT CA).

Temporal Representation:

The samples were collected between the dates of 2014-09-10 and 2014-09-10

Environmental Conditions:

QAPP Information:

QAPP for USGS Data Collected during the 2026 Integrated Report Cycle

QAPP Information Reference(s):

QAPP for USGS Data Collected during the 2026 Integrated Report Cycle

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

345947

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 1 of 1 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 1 samples fall within the range, and 0 of 1 samples fall below the threshold.

Data Reference:

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2008-09-03 and 2008-09-03

Environmental Conditions:

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346551

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the dates of 2018-09-20 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

345988

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2008-09-03 and 2008-09-03

Environmental Conditions:

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346600

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 4 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 4 samples fall within the range, and 4 of 4 samples fall below the threshold.

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-09-28 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346629

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2010-09-28 and 2019-06-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

345973

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2008-09-03 and 2008-09-03

Environmental Conditions:

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346557

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2018-09-20 and 2018-09-20

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

345946

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Quality Assurance Management Plan for the State of California's Surface Water Ambient Monitoring Program. Sacramento, CA. State Water Resources Control Board. SWAMP. December 2002 (1st version)

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2008-09-03 and 2008-09-03

Environmental Conditions:

QAPP Information:

The SWAMP QAPP (2008) was followed.

QAPP Information Reference(s):

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346526

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD021 (San Joaquin River at Sycamore Island).

Temporal Representation:

The samples were collected between the dates of 2018-09-20 and 2018-09-20

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346618

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD011 (San Joaquin River at Skaggs Bridge).

Temporal Representation:

The samples were collected between the dates of 2011-06-15 and 2015-09-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346641

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2010-09-28 and 2011-06-15

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346597

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed DFW_ABL_Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

Habitat, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545CR1002 (San Joaquin River -1002).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346599

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-09-28 and 2011-06-15

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346477

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 551FRE150 (San Joaquin River at Scout Island Downstream).

Temporal Representation:

The samples were collected between the dates of 2018-09-20 and 2018-09-20

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346633

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2010-09-28 and 2011-07-29

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332787

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-05-19

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346608

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJ0144 (San Joaquin River at Scout Island).

Temporal Representation:

The samples were collected between the dates of 2011-06-15 and 2011-06-15

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

70269

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

The sample collected did not exceed the objective. Three samples were collected within one week and were averaged into a single value for evaluation.

Data Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Table III-3 of the Sacramento/San Joaquin Basin plan (2011) states that electrical conductivity shall not exceed 150 micromhos/cm from Friant Dam to Gravelly Ford (90 percentile).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the SJR at Friant Cove station (545FRE504).

Temporal Representation:

Samples were collected on the following dates: 8/27/2008 8/31/2008 9/3/2008

Environmental Conditions:

QAPP Information:

SWAMP QAPP (2008).

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

70268

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

The samples collected did not exceed the objective. Three samples were collected within one week in 2008 and represent the composite sample compared to the 90 percentile objective.

Data Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Table III-3 of the Sacramento/San Joaquin Basin plan (2011) states that electrical conductivity shall not exceed 150 micromhos/cm from Friant Dam to Gravelly Ford (90 percentile).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the SJR at Fort Washington Beach station (545FRE503).

Temporal Representation:

Samples were collected on the following dates: 8/27/2008 8/31/2008 9/3/2008

Environmental Conditions:

QAPP Information:

SWAMP QAPP (2008).

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

70270

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

The sample collected did not exceed the objective. Three samples were collected within one week and were averaged into a single value for evaluation.

Data Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Table III-3 of the Sacramento/San Joaquin Basin plan (2011) states that electrical conductivity shall not exceed 150 micromhos/cm from Friant Dam to Gravelly Ford (90 percentile).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the SJR at Lost Lake County Park station (545FRE502).

Temporal Representation:

Samples were collected on the following dates: 8/27/2008 8/31/2008 9/3/2008

Environmental Conditions:

QAPP Information:

SWAMP QAPP (2008).

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

70279

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

The sample collected did not exceed the objective. Three samples were collected within one week and were averaged into a single value for evaluation.

Data Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Table III-3 of the Sacramento/San Joaquin Basin plan (2011) states that electrical conductivity shall not exceed 150 micromhos/cm from Friant Dam to Gravelly Ford (90 percentile).

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected from the SJR at Wildwood Native park station (545MAD008).

Temporal Representation:

Samples were collected on the following dates: 8/27/2008 8/31/2008 9/3/2008

Environmental Conditions:

QAPP Information:

SWAMP QAPP (2008).

QAPP Information Reference(s):

Surface Water Ambient Monitoring Program Quality Assurance Program Plan

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332833

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed SWAMP RWB5 Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 3 samples fall within the range, and 3 of 3 samples fall below the threshold.

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332761

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE505 (San Joaquin River at River Bottom Park).

Temporal Representation:

The samples were collected between the dates of 2021-07-28 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332730

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD504 (San Joaquin River at Friant Cove Bridge).

Temporal Representation:

The samples were collected between the dates of 2019-09-26 and 2019-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332734

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE503 (SJR at Fort Washington Beach).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332713

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD012 (San Joaquin River at Skaggs Bridge Downstream).

Temporal Representation:

The samples were collected between the dates of 2019-09-26 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332716

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Southern San Joaquin Water Quality Coalition data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 3 samples fall within the range, and 3 of 3 samples fall below the threshold.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRSKB (San Joaquin Skaggs Bridge).

Temporal Representation:

The samples were collected between the dates of 2010-12-13 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330216

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

WQX from the NWQMP for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-08-06 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332726

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed Southern San Joaquin Water Quality Coalition data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 3 samples fall within the range, and 3 of 3 samples fall below the threshold.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545SJRFTD (San Joaquin Friant Dam).

Temporal Representation:

The samples were collected between the dates of 2010-12-13 and 2012-12-10

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332777

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545MAD008 (SJR at Wildwood Native park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332736

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2010-08-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330219

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 165488, Specific Conductivity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330250

Pollutant:

Specific Conductivity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for SpecificConductivity. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Habitat, Water data for the 2020/2022 integrated report in Region 5.


DECISION ID	159192	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Sulfates
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 159192, Sulfates	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

346714

Pollutant:

Sulfates

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed DFW_ABL_Monitoring data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for Sulfate. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

The California Secondary MCL that is incorporated by reference into the Water Quality Control Plan for the Sacramento and San Joaquin River Basins specifies a range for sulfate of 250-500 mg/L assessed as an annual average.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545CR1002 (San Joaquin River -1002).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 159192, Sulfates	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330301

Pollutant:

Sulfates

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for Sulfate. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

WQX from the NWQMP for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-CARM-1002 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2014-09-02 and 2014-09-02

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159192, Sulfates	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330315

Pollutant:

Sulfates

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for Sulfate. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-10930 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-08-06 and 2018-08-06

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX from the NWQMP for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 159192, Sulfates	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330317

Pollutant:

Sulfates

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Dissolved

Beneficial Use:

Municipal & Domestic Supply

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Water Board staff assessed EPA National Aquatic Resources Survey (NARS) data for San Joaquin River (Friant Dam to Mendota Pool) to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the upper limit of the range for Sulfate. Additionally, 0 of the 1 samples fall within the range, and 1 of 1 samples fall below the threshold.

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5


DECISION ID	168306	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Toxicity
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. The number of measured exceedances is less than the minimum number of exceedances needed to place the water segment on the section CWA section 303(d) List for toxicant pollutants (Table 3.1 of the Listing Policy). The data used satisfies the data quality requirements (section 6.1.4) and data quantity requirements (section 6.1.5) of the Listing Policy. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. Based on the readily available data and information, the weight of evidence indicates that this water segment-pollutant combination should not be placed on the CWA section 303(d) List. Refer to the lines of evidence in this fact sheet for the data and information, sample counts and exceedances, quality assurance documentation, beneficial uses, and water quality objectives or numeric evaluation guidelines relied upon for this decision.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 168306, Toxicity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

347508

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

1 of the 23 samples collected by Southern San Joaquin Water Quality Coalition for San Joaquin River (Friant Dam to Mendota Pool) exhibited toxicity. A sample may have multiple toxicity test results, but will only be counted once. A sample is defined as being collected on the same day and the same location. The following organisms and parameters were utilized for the toxicity tests: Ceriodaphnia dubia for Survival, Pimephales promelas for Survival, Selenastrum capricornutum for Total Cell Count. The following tests exhibited toxicity: Selenastrum capricornutum for Total Cell Count on 2011-10-18.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life.

Objective/Criterion Reference:

Evaluation Guideline:

The sample is toxic when the response of the organisms exposed to the sample is significantly different (worse) than the response of the organisms exposed to the laboratory control based on statistical hypothesis testing. An exceedance is counted when the significant effect code is "Significant; Less Similarity," which means that the sample result is significantly different than the control result, and the percent effect is greater than the evaluation threshold. The default evaluation threshold is 20% unless otherwise stated.

Guideline Reference:

Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms. Fourth Edition. Office of Water, U.S. Environmental Protection Agency. Washington, D.C. EPA-821-R-02-013

Spatial Representation:

The samples were collected at monitoring site: 545SJRSKB ( San Joaquin Skaggs Bridge ).

Temporal Representation:

The samples were collected between the dates of 2011-01-18 and 2012-12-10.

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program

Line of Evidence (LOE) for Decision ID 168306, Toxicity	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

347507

Pollutant:

Toxicity

LOE Subgroup:

Toxicity

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

TOXICITY TESTING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, WQ from the Irrigated Lands Regulatory Program for the 2026 Integrated Report in Region 5

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at monitoring site: 545SJRFTD ( San Joaquin Friant Dam ).

Temporal Representation:

The samples were collected between the dates of 2011-01-18 and 2012-12-10.

Environmental Conditions:

QAPP Information:

QAPP Reference for Irrigated Lands Regulatory Program

QAPP Information Reference(s):

QAPP Reference for Irrigated Lands Regulatory Program


DECISION ID	164715	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	alpha-Endosulfan (Endosulfan 1)
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 164715, alpha-Endosulfan (Endosulfan 1)	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79391

Pollutant:

alpha-Endosulfan (Endosulfan 1)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Commercial or recreational collection of fish, shellfish, or organisms

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

The modified OEHHA Fish Contaminant Goal for endosulfan (l and ll) in fish tissue is 13,000 ppb. This screening level assumes an average body weight of 70 Kg and a consumption rate of 32 g/day. A cooking reduction factor of one is applied for skin-off.

Guideline Reference:

Development of Fish Contaminant Goals and Advisory Tissue Levels for Common Contaminants in California Sport Fish: Chlordane, DDTs, Dieldrin, Methylmercury, PCBs, Selenium, and Toxaphene

Guideline Reference:

Guidance for Assessing Chemical Contaminant Data for Use In Fish Advisories Volume 1: Fish Sampling and Analysis

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments

Line of Evidence (LOE) for Decision ID 164715, alpha-Endosulfan (Endosulfan 1)	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79382

Pollutant:

alpha-Endosulfan (Endosulfan 1)

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum total Endosulfan concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	171837	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Benthic Community Effects
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	A Source Unknown
TMDL Priority:	Low
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Benthic Community Effects are being considered for placement on the CWA section 303(d) List under sections 3.9 of the Listing Policy. Under section 3.9, additional lines of evidence (LOEs) associating the Benthic Community Effects decision with a water or sediment concentration of pollutants other than benthic-macroinvertebrate bioassessment or habitat assessment LOEs are necessary to place a water body on the 303(d) List for Benthic Community Effects. 26 line(s) of evidence evaluating benthic-macroinvertebrate bioassessment data is/are available in the administrative record to assess this indicator. 3 of 3 benthic-macroinvertebrate samples exceed the California Stream Condition Index (CSCI) impairment threshold. Additionally, there are associated pollutant impairments on the waterbody (including but not necessarily limited to Temperature and pH). Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for placing Benthic Community Effects in this waterbody segment on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 3 of 3 benthic-macroinvertebrate bioassessment samples had CSCI scores below 0.79. Therefore, this water body is exceeding the water quality threshold for the protection of the WARM and/or COLD beneficial use. 4. Pursuant to section 3.9 of the Listing Policy, the water segment has associated pollutant(s) samples that exceed water quality objectives. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232810

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

717

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRFB (SJR @ Friant Bridge).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232868

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

555

Number of Exceedances:

555

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSM (SJR @ San Mateo).

Temporal Representation:

Data collected hourly from 2011 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232786

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

1542

Number of Exceedances:

775

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSP (SJR @ Skaggs Park).

Temporal Representation:

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332991

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE502 (SJR at Lost Lake County Park).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332405

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE020 (San Joaquin River at Palm and Nees).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2010-08-30

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

2819

Pollutant:

Invasive Species

LOE Subgroup:

Population/Community Degradation

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish surveys

Data Used to Assess Water Quality:

The species assessed in support of this listing are: brown trout, carp, brown bullhead, green sunfish, and bluegill. A fish survey was completed between 1969-1971 (Moyle and Nichols, 1974). Data was compared to previous collections, as follows: (1) in a 1898 survey: 9 native species collected, 0 non-native species collected; (2) in a 1934 survey: 10 native species collected and 4 non-native species collected (brown trout, carp, bluegill and smallmouth bass); (3) in a 1940-1941 survey: 13 native species collected and 8 non-native species collected (brown trout, carp, brown bullfish, mosquitofish, green sunfish, bluegill, smallmouth and largemouth bass); and (4) in a 1969-71 survey (this study): 6 native species collected and 7 non-native species collected (brown trout, carp, mosquitofish, brown bullhead, green sunfish, bluegill, and largemouth bass). As the number of non-native fish species increased, the number of native fish species decreased over time.

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. This objective applies regardless of whether the toxicity is caused by a single substance or the interactive effect of multiple substances. Compliance with this objective will be determined by analyses of indicator organisms, species diversity, population density, growth anomalies, and biotoxicity tests of appropriate duration or other methods as specified by the Regional Water Board. Taken from Region 5 Basin Plan, Page III-8.00, Water Quality Objectives.

Objective/Criterion Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

Samples were collected at 167 locations during the summer and autumns of 1969, 1970, and 1971 for this study at Friant Dam on the San Joaquin River.

Temporal Representation:

Time range from 1898 to 1971. Samples from the study were compared to measurements collected in 1898, 1934, and 1940-1941. This study: summer and autumns of 1969, 1970 and 1971.

Environmental Conditions:

Changes in relative diversity and abundance of native species may also be driven by habitat alteration, flow changes, or hydromodification.

QAPP Information:

Peer Reviewed Journal Article.

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

229383

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE504)

Temporal Representation:

The samples were collected between the dates of 2010-09-14 and 2012-09-04

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

330119

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

WQX from the NWQMP for the 2026 Integrated Report in Region 5

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NARS_WQX-NRS_CA-11205 (San Joaquin River).

Temporal Representation:

The samples were collected between the dates of 2018-07-09 and 2018-07-09

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332411

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-05-19

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

342063

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Water Contact Recreation

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE007 (San Joaquin River at Wildwood Canoe Launch).

Temporal Representation:

The samples were collected between the dates of 2021-05-19 and 2021-05-19

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Field, Habitat, Toxicity, WQ from the Surface Water Ambient Monitoring Program for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

332407

Pollutant:

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Water Quality Control Plan, Central Valley Region Sacramento River Basin and San Joaquin River Basin: pH should not be lower than 6.5 or higher than 8.5.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: 545FRE504 (SJR at Friant Cove).

Temporal Representation:

The samples were collected between the dates of 2010-08-30 and 2021-07-28

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Habitat from the EPA National Rivers and Streams Assessment for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

352690

Pollutant:

Benthic-Macroinvertebrate Bioassessments

LOE Subgroup:

Population/Community Degradation

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Benthic macroinvertebrate surveys

Data Used to Assess Water Quality:

Water Board staff assessed data for 545CR0056 to determine beneficial use support and the results are as follows: 1 of 1 samples exceeded the water quality standard. CSCI scores were from 0.573611728 to 0.573611728 .

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life.

Objective/Criterion Reference:

Evaluation Guideline:

The California Stream Condition Index (CSCI) is a biological scoring tool that helps aquatic resource managers translate complex data about benthic macroinvertebrates found living in a stream into an overall measure of stream health. The CSCI score is calculated by comparing the expected condition with actual (observed) results (Rhen, A.C. et al., 2015). CSCI scores range from 0 (highly degraded) to greater than 1 (equivalent to reference). CSCI scoring of biological condition are as follows (per the scientific paper supporting the development of the CSCI scoring tool): greater than or equal to 0.92 = likely intact condition, 0.91 to 0.80 = possibly altered condition, 0.79 to 0.63 = likely altered condition, less than or equal to 0.62 = very likely altered condition. Sites with scores below 0.79 are considered to have exceeded the water quality objective for the aquatic life beneficial use.)

Guideline Reference:

Bioassessment in complex environments: designing an index for consistent meaning in different settings

Spatial Representation:

The samples were collected at 1 monitoring site: 545CR0056 (San Joaquin River ~5.1mi above Lone Willow Slough).

Temporal Representation:

Samples were collected from 2018-07-09 to 2018-07-09.

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

Benthic, Habitat from the EPA National Rivers and Streams Assessment for the 2026 Integrated Report in Region 5

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

352689

Pollutant:

Benthic-Macroinvertebrate Bioassessments

LOE Subgroup:

Population/Community Degradation

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Benthic macroinvertebrate surveys

Data Used to Assess Water Quality:

Water Board staff assessed data for 545CR0020 to determine beneficial use support and the results are as follows: 2 of 2 samples exceeded the water quality standard. CSCI scores were from 0.536641611 to 0.562993908 .

Data Reference:

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

All waters shall be maintained free of toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life.

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

Bioassessment in complex environments: designing an index for consistent meaning in different settings

Spatial Representation:

The samples were collected at 1 monitoring site: 545CR0020 (San Joaquin River ~2.8mi above Hwy 41).

Temporal Representation:

Samples were collected from 2018-07-10 to 2018-08-06.

Environmental Conditions:

QAPP Information:

SWAMP QAPrP

QAPP Information Reference(s):

WQX data for the 2020/2022 integrated report in Region 5.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

206318

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

This is a placeholder reference for data that was collected after QAPP requirements were developed, but exempt from the requirements.

Spatial Representation:

The samples were collected at 1 monitoring site (USGS-364620120153701)

Temporal Representation:

The samples were collected between the dates of 2011-05-25 and 2011-05-25

Environmental Conditions:

QAPP Information:

QAPP not requred

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

231091

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Fish Spawning

Number of Samples:

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Field, Habitat, Toxicity, Water data for the 2020/2022 integrated report in Region 5.

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129).

Guideline Reference:

Quality Assurance Program Plans, Quality Assurance Project Plans, and Standard Operating Procedures for the SWAMP program

Spatial Representation:

The samples were collected at 1 monitoring site (545FRE007)

Temporal Representation:

The samples were collected between the dates of 2018-09-04 and 2018-09-26

Environmental Conditions:

QAPP Information:

SWAMP QAPrP 2008

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232861

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

799

Number of Exceedances:

682

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2010 through 2019 at station SJRSCI (SJR @ Scout Island). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 682 of the 799 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSCI (SJR @ Scout Island).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232785

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

696

Number of Exceedances:

456

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSP (SJR @ Skaggs Park).

Temporal Representation:

Data collected hourly from 2010 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232814

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

768

Number of Exceedances:

573

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF1 (SJR @ Gravely Ford).

Temporal Representation:

Data collected hourly from 2008 through 2016. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232819

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Spawning

Number of Samples:

530

Number of Exceedances:

441

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRGF1 (SJR @ Gravely Ford).

Temporal Representation:

Data collected hourly from 2008 through 2016. Data from the salmonid spawning period - October 1 through December 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232802

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

174

Number of Exceedances:

173

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 173 of the 174 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2017 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232800

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

372

Number of Exceedances:

195

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2017 through 2019 at station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the smolt migration period, March 15 through June 15, and the adult migration period, September 1 through December 31, were assessed for this metric. The 7-DADM temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-day average of maximum daily temperature exceeded the evaluation guideline during 195 of the 372 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRCBBS (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232837

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1329

Number of Exceedances:

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRLL (SJR @ Lost Lake).

Temporal Representation:

Data collected hourly from 2002 through 2019. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232838

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

1055

Number of Exceedances:

675

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRMU (SJR @ Milburn Unit).

Temporal Representation:

Data collected hourly from 2007 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232811

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Fish Migration

Number of Samples:

2384

Number of Exceedances:

111

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRFB (SJR @ Friant Bridge).

Temporal Representation:

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232798

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

174

Number of Exceedances:

174

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data collected hourly from 2012 through 2014 at station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure). The data was provided by staff at the San Joaquin River Restoration Project. Only data from the steelhead summer rearing period, June 15 through September 15, were assessed for this metric. The 7-day moving average of maximum daily temperatures were computed for the contiguous 7-day periods available during this time frame. The 7-DADM temperature exceeded the evaluation guideline during 174 of the 174 7-day periods.

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

A 7-day average of daily maximum (7-DADM) temperature of 18 degrees Celsius is recommended by the USEPA for waterbodies that are used primarily for migrating adult and juvenile salmonids and moderate to low density (Non-Core) salmonid juvenile rearing during the period of summer maximum temperatures. The USEPA guidance recognizes that waterbodies meeting the 18 degrees 7-DADM criterion would also provide optimal or near optimal juvenile growth conditions (under limited food conditions) for much of the summer (USEPA, 2003). This evaluation guideline was applied during the steelhead summer rearing period (June 15 and September 15).

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRUSBIFUR (SJR, Upstream of Chowcilla Bypass Bifurcation Structure).

Temporal Representation:

Data collected hourly from 2012 through 2014. Data from the steelhead summer rearing period - June 15 through September 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.

Line of Evidence (LOE) for Decision ID 171837, Benthic Community Effects	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

232862

Pollutant:

Temperature, water

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

None

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

608

Number of Exceedances:

561

Data and Information Type:

PHYSICAL/CHEMICAL MONITORING

Data Used to Assess Water Quality:

Data Reference:

Continuous temperature data provided by CDFW's San Joaquin River Restoration Project.

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Evaluation Guideline:

Guideline Reference:

EPA Region 10 Guidance for Pacific Northwest State and Tribal Temperature Water Quality Standards. EPA 910-B-03-002. U.S. Environmental Protection Agency Region 10 Office of Water, Seattle, WA.

Spatial Representation:

Data collected from San Joaquin River Restoration Project Station SJRSM (SJR @ San Mateo).

Temporal Representation:

Data collected hourly from 2011 through 2019. Data from the juvenile rearing period - March 15 through June 15 - were assessed for this metric.

Environmental Conditions:

QAPP Information:

QAPP Information Reference(s):

San Joaquin River Restoration Program Stream Temperature Monitoring Study Standard Operating Procedures (SOPs) by the California Department of Fish and Wildlife.


DECISION ID	83212	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Aldrin
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. Zero of the one samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of one samples exceeded the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of sixteen samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 83212, Aldrin	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79381

Pollutant:

Aldrin

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum Aldrin concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	90356	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Heptachlor
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the section 303(d) list under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. Zero of one sample exceeds the evaluation guideline. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of one sample exceeded the evaluation guideline and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples are needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 90356, Heptachlor	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

79386

Pollutant:

Heptachlor

LOE Subgroup:

Pollutant-Tissue

Matrix:

Tissue

Fraction:

Fish fillet

Beneficial Use:

Cold Freshwater Habitat

Aquatic Life Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish tissue analysis

Data Used to Assess Water Quality:

Data Reference:

Cruise Report for the Surface Waters Ambient Monitoring Program (SWAMP) Bioaccumulation Screening Study in California Lakes and Reservoirs, Sampling Dates: June 2007- March 2008

Statewide Lakes Sportfish Contamination Study 2007 2008

Contaminants in Fish from California Lakes and Reservoirs, 2007-2008: Summary Report on a Two-Year Screening Survey

SWAMP Data:

SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the California Regional Water Quality Control Board Central Valley Region, Sacramento and San Joaquin River Basins. 4th ed

Evaluation Guideline:

National Academy of Science guidelines (NAS 1972) establish a maximum Heptachlor concentration of 100 ug/Kg (wet weight) in tissue samples for protection of aquatic life from bioaccumulation of toxic substances.

Guideline Reference:

National Academy of Sciences. Water Quality Criteria 1972. EPA-R3-73-033. Washington, D.C.: U.S. Environmental Protection Agency

Spatial Representation:

Temporal Representation:

Data was collected on 8/30/2007.

Environmental Conditions:

Staff is not aware of any special conditions that might affect interpretation of the data.

QAPP Information:

QAPP Information Reference(s):

Quality Assurance Project Plan Screening Study of Bioaccumulation in California Lakes and Reservoirs. Moss Landing Marine Labs. Prepared for SWAMP BOG, 49 pages plus appendices and attachments


DECISION ID	72308	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

Pollutant:	Invasive Species
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Sources:	A Source Unknown
TMDL Priority:	Low
Impairment from Pollutant or Pollution:	Pollution

Regional Board Conclusion:	This pollutant is being considered for placement in Category 4c as impaired by pollution under section 3.10 of the Listing Policy. Under section 3.10 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. Comparative analysis between four studies, from 1898 to 1971 was used to show an increase of non-native species and a decrease in native species over time. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination in Category 4c as impaired by pollution. This conclusion is based on the staff findings that: 1. Four studies were used spanning from 1898 to 1971. 2. Baseline data was taken from the 1898, 1934, and 1940-41 studies. 3. In a 1898 survey: 9 native species collected, 0 non-native species collected; in a 1934 survey: 10 native species were collected and 4 non-native species were collected; in a 1940-1941 survey: 13 native species were collected and 8 non-native species were collected; and in a 1969-71 survey: 6 native species were collected and 7 non-native species were collected. As the number of non-native fish species increased, the number of native fish species decreased over time. 4. It cannot be determined if the trend in water quality is expected to meet water standards by the next listing cycle. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.

Regional Board Decision Recommendation:	This is a decision previously approved by the State Water Resources Control Board and the USEPA. No new data were assessed by the Regional Board for the current cycle. The decision has not changed.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.

Line of Evidence (LOE) for Decision ID 72308, Invasive Species	Region 5
San Joaquin River (Friant Dam to Mendota Pool)

LOE ID:

2819

Pollutant:

Invasive Species

LOE Subgroup:

Population/Community Degradation

Matrix:

Water

Fraction:

None

Beneficial Use:

Warm Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Fish surveys

Data Used to Assess Water Quality:

Data Reference:

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference: