Klamath River HU, Shasta River HA

Waterbody ID (WBID): CAR1055000119990528113804
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 (8)

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

Pollutant / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
AluminumMetals	74204	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Benthic Community EffectsOther Cause	169301	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Indicator BacteriaPathogens	162992	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Organic Enrichment/Low Dissolved OxygenNutrients	78845	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Shasta River DO & Temperature	—
Oxygen, DissolvedNutrients	157122	List on 303(d) list (being addressed by USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Shasta River DO & Temperature	—
pHOther Cause	155237	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Specific ConductivitySALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES	163032	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Temperature, waterOther Cause	157124	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Shasta River DO & Temperature	—

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: CAR1055000119990528113804
CALWNUM: 1105.500201, 1105.500203, 1105.500302, 1105.500402, 1105.500603, 1105.500709, 1105.500801, 1105.500803, 1105.500902, 1105.501003
WBD code: 180102070101, 180102070104, 180102070303, 180102070304, 180102070401, 180102070404, 180102070408, 180102070410, 180102070501, 180102070503
Geometry: Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

View official Water Board fact sheet ↗Download Appendix A source file ↗

Location

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

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Watershed: —
Assessed size: 1402.77 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

Roseburg1 47I021433

pH · most recent exceedance RY 2018 · association: derived receiving water

Yreka Transfer Recycling Inc1 47I024614

Aluminum · most recent exceedance RY 2025 · association: derived receiving water

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

Black Butte Auto Dismantler

Weed · Notice of Intent · 0.55 km away

derived_receiving_water