California Stormwater Intelligence

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Waterbody profile

Official Water Board record · 2026 cycle

Clam Beach (near Mad River mouth)

Waterbody ID (WBID): CAC1091001120110712113517
County / counties: Humboldt
Regional Water Board: Regional Board 1 - North Coast Region
Waterbody type: Coastal & Bay Shoreline
Condition category: Category 5 — 303(d) listed, TMDL required
Integrated Report cycle: 2026

303(d) listings (1)

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
Indicator BacteriaPathogens	161502	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low

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: CAC1091001120110712113517
CALWNUM: 1109.100101
WBD code: 180101020606
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: 2.29 Miles

Derived facility associations

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

Derived

Central Transport

Eureka · No Exposure Certification · 0.92 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Chevron Prod Co Eureka Termina

Eureka · Notice of Intent · 0.78 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Fairhaven Business Park

Fairhaven · Notice of Intent · 0.30 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Fairhaven Chip Facility

Fairhaven · Notice of Intent · 0.19 km away

derived_receiving_water

Derived by California Stormwater Intelligence

L M Renner inc Tosco Bulk PL

Eureka · Notice of Intent · 0.80 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Samoa · No Exposure Certification · 0.26 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Redwood Coast Trucking

Arcata · Notice of Intent · 0.12 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Redwood Marine Terminal 2

Eureka · No Exposure Certification · 0.20 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Redwood Marine Terminal II

Samoa · No Exposure Certification · 0.41 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Redwood Marine Terminal II

Eureka · Notice of Intent · 0.31 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Samoa Log Yard Facility

Samoa · Notice of Intent · 0.25 km away

derived_receiving_water

Derived by California Stormwater Intelligence

SLI Eureka Dock

Eureka · Notice of Intent · 0.69 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.