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

Supporting Information

Regional Board 6 - Lahontan Region

Water Body Name:	Unnamed tributary of Martis Creek (Nevada and Placer County)
Water Body ID:	CAR6352004020230502031115
Water Body Type:	River & Stream


DECISION ID	170320	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

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

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 170320, Nitrogen	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

347822

Pollutant:

Total Nitrogen as N

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 Truckee River Water Quality Monitoring Plan data to determine beneficial use support and results are as follows:
1 of 3 samples exceeded the water quality threshold for Nitrogen, Total

Data Reference:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Nitrogen, Total in this water body is 1.45 (mg/L), (as a MOMMPR).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2015-02-07 and 2017-05-25

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639


DECISION ID	163830	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

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	Revised
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	Insufficient information is available to determine beneficial use support for this waterbody-pollutant combination with the statistical power and confidence required by the Listing Policy. Beneficial use support will be reassessed in a future cycle, if more data are available

Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:	After review of the available data and information, SWRCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because it cannot be determined if applicable water quality standards are not being exceeded.

Line of Evidence (LOE) for Decision ID 163830, Turbidity	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

343494

Pollutant:

Turbidity

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 Truckee River Water Quality Monitoring Plan data to determine beneficial use support and results are as follows:
4 of 4 samples exceeded the water quality threshold for Turbidity

Data Reference:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Turbidity in this water body is 3 (NTU), (as a MOMM).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2010-12-14 and 2017-05-25

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639

Line of Evidence (LOE) for Decision ID 163830, Turbidity	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

343492

Pollutant:

Turbidity

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 Truckee River Water Quality Monitoring Plan data to determine beneficial use support and results are as follows:
3 of 4 samples exceeded the water quality threshold for Turbidity

Data Reference:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Turbidity in this water body is 3 (NTU), (as a MOMM).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2010-12-14 and 2017-05-25

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639


DECISION ID	170316	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

Pollutant:	Nitrogen, Nitrate
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	A Source Unknown
TMDL Priority:	Low
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. Two of the 5 samples exceed the objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Two of 5 samples exceed the objective and this exceeds the allowable frequency listed in Table 3.1 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 be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 170316, Nitrogen, Nitrate	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

347759

Pollutant:

Nitrogen, Nitrate

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 Truckee River Water Quality Monitoring Plan data to determine beneficial use support and results are as follows:
1 of 1 samples exceeded the water quality threshold for Nitrate as N

Data Reference:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Nitrate as N in this water body is 1 (mg/L), (as a MOMMPR).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2012-11-30 and 2017-02-09

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639

Line of Evidence (LOE) for Decision ID 170316, Nitrogen, Nitrate	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

347754

Pollutant:

Nitrogen, Nitrate

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 Truckee River Water Quality Monitoring Plan data to determine beneficial use support and results are as follows:
1 of 4 samples exceeded the water quality threshold for Nitrate as N

Data Reference:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Nitrate as N in this water body is 1 (mg/L), (as a MOMMPR).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2012-11-30 and 2017-02-09

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639


DECISION ID	169022	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

Pollutant:	Phosphorus
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	A Source Unknown
TMDL Priority:	Low
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. Two lines of evidence are available in the administrative record to assess this pollutant. Five of the 8 samples exceed the objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Five of 8 samples exceed the objective and this exceeds the allowable frequency listed in Table 3.1 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 be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 169022, Phosphorus	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

347907

Pollutant:

Phosphorus

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 Truckee River Water Quality Monitoring Plan data to determine beneficial use support and results are as follows:
0 of 4 samples exceeded the water quality threshold for Phosphorus as P

Data Reference:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Phosphorus as P in this water body is 0.05 (mg/L), (as a MOMMPR).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2010-12-14 and 2017-05-25

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639

Line of Evidence (LOE) for Decision ID 169022, Phosphorus	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

347894

Pollutant:

Phosphorus

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 Truckee River Water Quality Monitoring Plan data to determine beneficial use support and results are as follows:
2 of 4 samples exceeded the water quality threshold for Phosphorus as P

Data Reference:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Phosphorus as P in this water body is 0.05 (mg/L), (as a MOMMPR).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2010-12-14 and 2017-05-25

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639

Line of Evidence (LOE) for Decision ID 169022, Phosphorus	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

347913

Pollutant:

Phosphorus

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:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Phosphorus as P in this water body is 0.05 (mg/L), (as a MOMMPR).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2010-12-14 and 2017-05-25

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639

Line of Evidence (LOE) for Decision ID 169022, Phosphorus	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

347896

Pollutant:

Phosphorus

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:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Phosphorus as P in this water body is 0.05 (mg/L), (as a MOMMPR).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2010-12-14 and 2017-05-25

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639


DECISION ID	170319	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

Pollutant:	Total Kjeldahl Nitrogen (TKN)
Final Listing Decision:	List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	New Decision
Revision Status	Revised
Sources:	A Source Unknown
TMDL Priority:	Low
Impairment from Pollutant or Pollution:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. Two of the 4 samples exceed the objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Two of 4 samples exceed the objective and this exceeds the allowable frequency listed in Table 3.1 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 be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.

State Board Review of Regional Board Conclusion and Recommendation:

State Board Decision Recommendation:

Line of Evidence (LOE) for Decision ID 170319, Total Kjeldahl Nitrogen (TKN)	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

348007

Pollutant:

Total Kjeldahl Nitrogen (TKN)

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:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The Basin Plan objective for Nitrogen, Total Kjeldahl in this water body is 0.45 (mg/L), (as a MOMMPR).

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: DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd. (DST-MC6)

Temporal Representation:

The samples were collected between the dates of 2010-12-14 and 2017-05-25

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639


DECISION ID	162815	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

Pollutant:	Nitrate/Nitrite (Nitrite + Nitrate as N)
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:	Pollutant

Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. Zero of the 6 samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Zero of the 6 samples exceed the water quality objective and this does not exceed the allowable frequency listed in Table 3.1 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 162815, Nitrate/Nitrite (Nitrite + Nitrate as N)	Region 6
Unnamed tributary of Martis Creek (Nevada and Placer County)

LOE ID:

338797

Pollutant:

Nitrate/Nitrite (Nitrite + Nitrate as N)

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 Truckee River Water Quality Monitoring Plan data for Unnamed tributary of Martis Creek (Nevada and Placer County) to determine beneficial use support and results are as follows: 0 of 6 samples exceeded the water quality threshold for Nitrate + Nitrite as N.

Data Reference:

Benthic, Field, Habitat, WQ from the Truckee River Water Quality Monitoring Plan for the 2026 Integrated Report in Region 6

SWAMP Data:

Non-SWAMP

Water Quality Objective/Criterion:

The California Maximum Contaminant Level for nitrate + nitrite (as N) that is incorporated by reference in the Water Quality Control Plan, Lahontan Region is 10.0 mg/L (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: DST-MC6 (DST-MC6 Unnamed Martis trib downstream of Martis Ck Rd.).

Temporal Representation:

The samples were collected between the dates of 2010-12-18 and 2012-03-21

Environmental Conditions:

QAPP Information:

TRWQMP QAPP Equivalent

QAPP Information Reference(s):

Lahontan Water Board - TRWQMP_QAPP equivalent - Truckee River Water Quality Monitoring Plan - 402639