← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Klamath River HU, Scott River HA

Waterbody ID (WBID)
CAR1054103519980707120412
County / counties
Siskiyou
Regional Water Board
Regional Board 1 - North Coast Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (9)

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
AluminumMetals168857Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Biostimulatory ConditionsNutrients168858Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Indicator BacteriaPathogens162991List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Oxygen, DissolvedNutrients157115Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
pHOther Cause155235Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
SedimentSediment168859List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLScott River Sediment & Temperature
Sedimentation/SiltationSediment71923Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLScott River Sediment & Temperature
Temperature, waterOther Cause157117Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLScott River Sediment & Temperature
TurbiditySediment157118List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow

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, 10:56 PM UTC
Waterbody ID
CAR1054103519980707120412
CALWNUM
1105.410102, 1105.410201, 1105.410303, 1105.410305, 1105.410306, 1105.420105, 1105.420404, 1105.420405, 1105.420701, 1105.420903
WBD code
180102080203, 180102080204, 180102080401, 180102080403, 180102080503, 180102080504, 180102080601, 180102080603, 180102080604, 180102080605
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
2443.67 Miles

Derived facility associations

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

Derived
Etna Brewing Company

Etna · No Exposure Certification · 0.81 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Indian Creek Mine Site

Fort Jones · Notice of Intent · 0.05 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Moores Gravel Inc

Callahan · Notice of Intent · 0.01 km away

derived_nearby_in_watershed

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.