← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Truckee River, Upper (below Christmas Valley)

Waterbody ID (WBID)
CAR6341004220000220174338
County / counties
El Dorado
Regional Water Board
Regional Board 6 - Lahontan Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (6)

Each row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.

Pollutant / stressorDecision IDFinal listing decisionDecision statusTMDL requirement statusTMDL projectTMDL priority
Benthic Community EffectsOther Cause171792List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ChlorideSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES163651List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
IronMetals70816Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
NitrogenNutrients170435List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Oxygen, DissolvedNutrients162066List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PhosphorusNutrients163652Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLLake Tahoe Nutrients/Sediment

Source & provenance

Agency
California State Water Resources Control Board
Report
Final 2026 California Integrated Report
Dataset
Appendix A — 2026 303(d) List of Impaired Waters
Imported
Sep 16, 2026, 10:57 PM UTC
Waterbody ID
CAR6341004220000220174338
CALWNUM
8634.100102, 8634.100301, 8634.100402, 8634.100403
WBD code
160501010301, 160501010303, 160501010500
Geometry
Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

Location

Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.

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Watershed
Assessed size
17.49 Miles

Facilities with an NAL exceedance for a listed pollutant (2)

Geographically associated industrial stormwater facilities whose reported results exceeded an Industrial General Permit Numeric Action Level for a pollutant this waterbody is listed for.

Derived

Sierra Tahoe Ready Mix6A09I001197

Iron · most recent exceedance RY 2017 · association: derived nearby in watershed

South Tahoe Refuse Transfer Station6A09I024199

Iron · most recent exceedance RY 2025 · association: derived nearby in watershed

This is derived co-occurrence between a calculated NAL comparison and the official 303(d) listing for this waterbody. An NAL exceedance triggers Exceedance Response Actions under the permit; it is not a violation and does not establish that any facility caused or contributed to this impairment.

Derived facility associations

Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.

Derived
Lake Tahoe Airport

South Lake Tahoe · Notice of Intent · 0.39 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

REACH 037 - South Lake Tahoe

South Lake Tahoe · Notice of Non-Applicability · 0.34 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Sierra Tahoe Ready Mix

South Lake Tahoe · Notice of Intent · 0.56 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

South Tahoe Refuse Transfer Station

South Lake Tahoe · Notice of Intent · 0.85 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Tahoe Asphalt Inc

South Lake Tahoe · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

tahoe diesel service

South Lake Tahoe · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Tahoe Transportation Districts

South Lake Tahoe · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

UPS South Lake Tahoe CASLT

South Lake Tahoe · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Facility records are official Industrial General Permit registrations, but the association between a facility and this waterbody is derived geographically (proximity or shared HUC12 subwatershed) and is not a Water Board receiving-water determination. Where a permit carries a Water Board-stated TMDL requirement naming this water, it is listed separately above.