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

Supporting Information

Regional Board 6 - Lahontan Region

Water Body Name:	Haiwee Reservoir
Water Body ID:	CAL6241007119980806113450
Water Body Type:	Lake & Reservoir


DECISION ID	161558	Region 6
Haiwee Reservoir

Pollutant:	Copper
Final Listing Decision:	Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2018)
Revision Status	Revised
Reason for Delisting:	Applicable WQS attained; reason for recovery unspecified
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.1 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Twenty lines of evidence are available in the administrative record to assess this pollutant. Zero of the 29 samples exceeded the criteria for MUN and zero of 21 samples exceeded the criteria for COLD. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification for removing this water segment-pollutant combination from 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 29 samples exceeded the criteria for MUN and zero of 21 samples exceeded the criteria for COLD and this does not exceed the allowable frequency listed in Table 4.1 of the Listing Policy. 4. Pursuant to section 4.11 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 removed from the section 303(d) list because applicable water quality standards for the pollutant are not being exceeded.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338549

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH J (North Haiwee J).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338522

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH S (South Haiwee S).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338541

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH L (South Haiwee L).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-09-02

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338539

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH M (South Haiwee M).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338538

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH R (South Haiwee R).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338530

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH D (North Haiwee D).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

4613

Pollutant:

Copper

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Not Recorded

Beneficial Use:

Cold Freshwater Habitat

Number of Samples:

Number of Exceedances:

Data and Information Type:

Not Specified

Data Used to Assess Water Quality:

Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006.

Data Reference:

Placeholder reference pre-2006 303(d)

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Unspecified

Objective/Criterion Reference:

Placeholder reference pre-2006 303(d)

Evaluation Guideline:

Unspecified

Guideline Reference:

Placeholder reference pre-2006 303(d)

Spatial Representation:

Unspecified

Temporal Representation:

Unspecified

Environmental Conditions:

Unspecified

QAPP Information:

Unspecified

QAPP Information Reference(s):

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338506

Pollutant:

Copper

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:

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The dissolved copper criterion continuous concentration (expressed as a 4-day average) to protect aquatic life in freshwater is hardness dependent. The criterion when calculated using a default hardness of 100 mg/L is 9 ug/L (California Toxics Rule, 2000).

Objective/Criterion Reference:

Water Quality Standards 2000. Establishment of numeric criteria for priority toxic pollutants for the State of California: Rules and regulations. Federal Register Vol. 65, No. 97. Washington, D.C.: Environmental Protection Agency

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH T (South Haiwee T).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338507

Pollutant:

Copper

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:

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

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: SH L (South Haiwee L).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-09-02

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338511

Pollutant:

Copper

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:

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

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: NH I (North Haiwee I).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338524

Pollutant:

Copper

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:

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

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: SH K (South Haiwee K).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338525

Pollutant:

Copper

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:

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

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: SH S (South Haiwee S).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338535

Pollutant:

Copper

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 Haiwee Reservoirs Delisting Monitoring Events data for Haiwee Reservoir to determine beneficial use support and results are as follows: 0 of 1 samples exceeded the water quality threshold for Copper.

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

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: NH B (North Haiwee B).

Temporal Representation:

The samples were collected between the dates of 2020-10-07 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338544

Pollutant:

Copper

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:

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

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: NH J (North Haiwee J).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338548

Pollutant:

Copper

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:

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

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: SH M (South Haiwee M).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338503

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH H (North Haiwee H).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338505

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH B (North Haiwee B).

Temporal Representation:

The samples were collected between the dates of 2020-10-07 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338510

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH O (South Haiwee O).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338515

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH N (South Haiwee N).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161558, Copper	Region 6
Haiwee Reservoir

LOE ID:

338542

Pollutant:

Copper

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Secondary Maximum Contaminant Level for total Copper incorporated by reference in the Water Quality Control Plan, Lahontan Region is 1.0 mg/L.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH Q (South Haiwee Q).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628


DECISION ID	161559	Region 6
Haiwee Reservoir

Pollutant:	Oxygen, Dissolved
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 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Thirty-one lines of evidence are available in the administrative record to assess this parameter: 20 which assess dissolved oxygen concentration data and 11 which assess dissolved oxygen percent saturation data. Zero of 59 samples are below the objective for minimum dissolved oxygen concentration. One of 31 samples is below the objective for minimum dissolved oxygen percent saturation. 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 59 samples are below the objective for minimum dissolved oxygen concentration. One of 31 samples is below the objective for minimum dissolved oxygen percent saturation. 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 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339284

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

For waters with the beneficial uses of COLD, COLD with SPWN, WARM, and WARM with SPWN, the minimum dissolved oxygen concentration shall not be less than that specified in Table 3-6. (Water Quality Control Plan, Lahontan Region)

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH D (North Haiwee D).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339144

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH M (South Haiwee M).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339173

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH L (South Haiwee L).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-09-02

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339176

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH G (North Haiwee G).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339184

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH H (North Haiwee H).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339201

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH J (North Haiwee J).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339206

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH K (South Haiwee K).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339071

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH Q (South Haiwee Q).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339219

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH C (North Haiwee C).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339310

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH O (South Haiwee O).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339311

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH N (South Haiwee N).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339084

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH R (South Haiwee R).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339229

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH A (North Haiwee A).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339328

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH S (South Haiwee S).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339240

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH E (North Haiwee E).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339257

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH P (South Haiwee P).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339264

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH F (North Haiwee F).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339123

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH I (North Haiwee I).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339391

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH Q (South Haiwee Q).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339389

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH T (South Haiwee T).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339134

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH T (South Haiwee T).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339461

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH P (South Haiwee P).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339465

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH S (South Haiwee S).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339467

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH K (South Haiwee K).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339470

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH N (South Haiwee N).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339485

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH R (South Haiwee R).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339506

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH O (South Haiwee O).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339421

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:

Water Board staff assessed Haiwee Reservoirs Delisting Monitoring Events data for Haiwee Reservoir to determine beneficial use support and results are as follows: 1 of 2 samples exceeded the water quality threshold for Oxygen, Saturation.

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH L (South Haiwee L).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-09-02

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339364

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH M (South Haiwee M).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339448

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Water Quality Control Plan for the Lahontan Region's water quality objective states that the dissolved oxygen concentration shall not be less than 80 percent of saturation.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH A (North Haiwee A).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161559, Oxygen, Dissolved	Region 6
Haiwee Reservoir

LOE ID:

339169

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:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH B (North Haiwee B).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628


DECISION ID	169690	Region 6
Haiwee Reservoir

Pollutant:	Specific Conductivity
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 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status. Twenty lines of evidence are available in the administrative record to assess this pollutant. Zero of the 59 samples exceed the objective (MCL). 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 59 samples exceeded the objective, and 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 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340503

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

California Maximum Contaminant Levels (MCLs) apply to ambient waters under the Lahontan Basin Plan's 'Chemical Constituents' objective. The California Secondary MCL for specific conductivity is 900 uS/cm.

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH G (North Haiwee G).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340337

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH I (North Haiwee I).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340673

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH N (South Haiwee N).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340387

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH R (South Haiwee R).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340344

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH L (South Haiwee L).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-09-02

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340451

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH S (South Haiwee S).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340358

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH C (North Haiwee C).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340592

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH H (North Haiwee H).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340619

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH B (North Haiwee B).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340649

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH E (North Haiwee E).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340602

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH O (South Haiwee O).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340596

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH M (South Haiwee M).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340404

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH T (South Haiwee T).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340402

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH Q (South Haiwee Q).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340617

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH F (North Haiwee F).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340613

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH J (North Haiwee J).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340476

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH D (North Haiwee D).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340331

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH A (North Haiwee A).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340614

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH K (South Haiwee K).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 169690, Specific Conductivity	Region 6
Haiwee Reservoir

LOE ID:

340504

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH P (South Haiwee P).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628


DECISION ID	161560	Region 6
Haiwee Reservoir

Pollutant:	pH
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:

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340071

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:

Water Board staff assessed Haiwee Reservoirs Delisting Monitoring Events data for Haiwee Reservoir to determine beneficial use support and results are as follows: 0 of 3 samples exceeded the water quality threshold for pH. The objective for this pollutant requires background information that is currently unavailable, and therefore an assessment of water quality thresholds could not be made.

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Lahontan Basin Plan's regionwide objective for pH states: 'In fresh waters with designated beneficial uses of COLD or WARM, changes in normal ambient pH levels shall not exceed 0.5 pH units. For all other waters of the region, the pH shall not be depressed below 6.5 nor raised above 8.5 units. The Regional Board recognizes that some waters of the Region may have natural pH levels outside of the 6.5 to 8.5 range. Compliance with the pH objective for these waters will be determined on a case-by-case basis.'

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH J (North Haiwee J).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339852

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH M (South Haiwee M).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340180

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH B (North Haiwee B).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340110

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH N (South Haiwee N).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340114

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH F (North Haiwee F).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339955

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH K (South Haiwee K).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339964

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:

Water Board staff assessed Haiwee Reservoirs Delisting Monitoring Events data for Haiwee Reservoir to determine beneficial use support and results are as follows: 0 of 2 samples exceeded the water quality threshold for pH. The objective for this pollutant requires background information that is currently unavailable, and therefore an assessment of water quality thresholds could not be made.

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH L (South Haiwee L).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-09-02

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339648

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH Q (South Haiwee Q).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339656

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH I (North Haiwee I).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339828

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH A (North Haiwee A).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340129

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH C (North Haiwee C).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339900

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH R (South Haiwee R).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340141

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH S (South Haiwee S).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340074

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH K (South Haiwee K).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340153

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH J (North Haiwee J).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340002

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH T (South Haiwee T).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340084

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH L (South Haiwee L).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-09-02

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340160

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH B (North Haiwee B).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339851

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH M (South Haiwee M).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340011

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH H (North Haiwee H).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340096

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH D (North Haiwee D).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339861

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH N (South Haiwee N).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340185

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH O (South Haiwee O).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340111

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH E (North Haiwee E).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340117

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH F (North Haiwee F).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339880

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH P (South Haiwee P).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339962

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH G (North Haiwee G).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339760

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH P (South Haiwee P).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339780

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH R (South Haiwee R).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339705

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH A (North Haiwee A).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339548

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH I (North Haiwee I).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339967

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH C (North Haiwee C).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340134

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH H (North Haiwee H).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339978

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH D (North Haiwee D).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340135

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH Q (South Haiwee Q).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340140

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH T (South Haiwee T).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339985

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH E (North Haiwee E).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

339911

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH S (South Haiwee S).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340003

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: NH G (North Haiwee G).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161560, pH	Region 6
Haiwee Reservoir

LOE ID:

340158

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

Spatial Representation:

The samples were collected at 1 monitoring site: SH O (South Haiwee O).

Temporal Representation:

The samples were collected between the dates of 2020-04-29 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628


DECISION ID	161561	Region 6
Haiwee Reservoir

Pollutant:	Turbidity
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollution

Regional Board Conclusion:	This pollutant is being considered for removal from the CWA section 303(d) List under section 4.2 of the Listing Policy. Under this section a single line of evidence is necessary to assess listing status. Twenty lines of evidence are available in the administrative record to assess this pollutant. Four of the forty samples exceed the objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against removing this water segment-pollutant combination from 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 forty samples exceeded the objective and this exceeds the allowable frequency listed in Table 4.2 of the Listing Policy. 4. Pursuant to section 4.11 of the Listing Policy, no additional data and information are available indicating that standards are 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 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340961

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Water designated as MUN shall not contain concentrations of chemical constituents in excess of the maximum contaminant level (MCL) or secondary maximum contaminant level (SMCL) based upon drinking water standards specified in Title 22 of the California Code of Regulations. The Lahontan Basin Plan also has regionwide turbidity objective for other beneficial uses that states: Waters shall be free of changes in turbidity that cause nuisance or adversely affect the water for beneficial uses. Increases in turbidity shall not exceed natural levels by more than 10%.

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

California Maximum Contaminant Levels (MCLs) apply to ambient surface waters under the Lahontan Basin Plan's 'Chemical Constituents' objective. The Secondary MCL for turbidity is 5 NTU. Calculation of a numeric objective for other beneficial uses requires comparison with upstream or other background data which may not be available as part of the data used for water quality assessment.

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH Q (South Haiwee Q).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340832

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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 Haiwee Reservoirs Delisting Monitoring Events data for Haiwee Reservoir to determine beneficial use support and results are as follows: 1 of 3 samples exceeded the water quality threshold for Turbidity.

Data Reference:

Field, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH A (North Haiwee A).

Temporal Representation:

The samples were collected between the dates of 2020-04-28 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340971

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH O (South Haiwee O).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340783

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH R (South Haiwee R).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340786

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH G (North Haiwee G).

Temporal Representation:

The samples were collected between the dates of 2020-09-01 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340914

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH J (North Haiwee J).

Temporal Representation:

The samples were collected between the dates of 2020-09-01 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340915

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH K (South Haiwee K).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340916

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH F (North Haiwee F).

Temporal Representation:

The samples were collected between the dates of 2020-09-01 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340856

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH D (North Haiwee D).

Temporal Representation:

The samples were collected between the dates of 2020-09-01 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340924

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH T (South Haiwee T).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340988

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH H (North Haiwee H).

Temporal Representation:

The samples were collected between the dates of 2020-09-01 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340799

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH M (South Haiwee M).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340881

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH E (North Haiwee E).

Temporal Representation:

The samples were collected between the dates of 2020-09-01 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340945

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH I (North Haiwee I).

Temporal Representation:

The samples were collected between the dates of 2020-09-01 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340946

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH N (South Haiwee N).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340889

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH C (North Haiwee C).

Temporal Representation:

The samples were collected between the dates of 2020-09-01 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340951

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH L (South Haiwee L).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-09-02

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340829

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH S (South Haiwee S).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340892

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: NH B (North Haiwee B).

Temporal Representation:

The samples were collected between the dates of 2020-09-01 and 2020-10-07

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628

Line of Evidence (LOE) for Decision ID 161561, Turbidity	Region 6
Haiwee Reservoir

LOE ID:

340845

Pollutant:

Turbidity

LOE Subgroup:

Pollutant-Water

Matrix:

Water

Fraction:

Total

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, WQ from the North and South Haiwee Water Quality monitoring for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

Objective/Criterion Reference:

Water Quality Control Plan for the Lahontan Region (as amended)

Evaluation Guideline:

Guideline Reference:

California Code of Regulations, Title 22, Division 4, Chapter 15. Domestic Water Quality and Monitoring

Spatial Representation:

The samples were collected at 1 monitoring site: SH P (South Haiwee P).

Temporal Representation:

The samples were collected between the dates of 2020-09-02 and 2020-10-06

Environmental Conditions:

QAPP Information:

MBC Haiwee Delisting QAPP

QAPP Information Reference(s):

Lahontan Water Board - MBC_Haiwee_Delisting_QAPP - Haiwee Reservoirs Delisting Monitoring Events - 402628