Klamath River HU, Lower HA, Klamath Glen HSA

Waterbody ID (WBID): CAR1051108619990608084033
County / counties: Del Norte, Humboldt
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 (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 / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
AluminumMetals	168812	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
NutrientsNutrients	168819	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Klamath River Nutrients, Temperature, DO, and Microcystin.	—
Organic Enrichment/Low Dissolved OxygenNutrients	79976	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Klamath River Nutrients, Temperature, DO, and Microcystin.	—
SedimentSediment	168826	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
Sedimentation/SiltationSediment	68222	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Temperature, waterOther Cause	155221	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Klamath River Nutrients, Temperature, DO, and Microcystin.	—

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: CAR1051108619990608084033
CALWNUM: 1105.110201, 1105.110306, 1105.110501, 1105.110504, 1105.110505, 1105.110506, 1105.110701, 1105.110801, 1105.110804, 1106.110304
WBD code: 180102090805, 180102090901, 180102090905, 180102091003, 180102091004, 180102091005, 180102091006, 180102091007, 180102091101, 180102091102
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: 1298.51 Miles

Derived facility associations

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

Derived

Bald Hills Quarry

Orick · Notice of Intent · 0.31 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Klamath Log Yard

Klamath · Notice of Intent · 0.54 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Klamath Woodwaste Landfill

Klamath · No Exposure Certification · 0.12 km away

derived_receiving_water

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.