← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Trout Creek (above Hwy 50)

Waterbody ID (WBID)
CAR6341003120000220171341
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 (7)

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 Cause171778List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ChlorideSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES163643List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
IronMetals69220List on 303(d) list (TMDL required list)Original5A TMDL still requiredLow
NitrogenNutrients170489Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLLake Tahoe Nutrients/Sediment
Oxygen, DissolvedNutrients162040List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PhosphorusNutrients163644Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLLake Tahoe Nutrients/Sediment
TurbiditySediment162043Do 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
CAR6341003120000220171341
CALWNUM
8634.100202, 8634.100301
WBD code
160501010302, 160501010303
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
12.23 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 watershed association

South Tahoe Refuse Transfer Station6A09I024199

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

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

derived_watershed_association

Derived by California Stormwater Intelligence

Lake Tahoe Sch Dist Ymf

South Lake Tahoe · Notice of Intent · 0.33 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

REACH 037 - South Lake Tahoe

South Lake Tahoe · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Sierra Tahoe Ready Mix

South Lake Tahoe · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

South Tahoe Public Utility District

South Lake Tahoe · Notice of Intent · 0.10 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

South Tahoe Refuse Transfer Station

South Lake Tahoe · Notice of Intent

derived_watershed_association

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.