California Stormwater Intelligence
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Waterbody profile

Official Water Board record · 2026 cycle

Mendocino Coast HU, Navarro River HA

Waterbody ID (WBID)
CAR1135007719980709093957
County / counties
Mendocino
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 (5)

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
NickelMetals157317Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
SedimentSediment168902List on 303(d) list (being addressed by USEPA approved TMDL)Original5B — Addressed by USEPA-approved TMDLNavarro River Temperature—
Sedimentation/SiltationSediment69762List on 303(d) list (being addressed by USEPA approved TMDL)Original5B — Addressed by USEPA-approved TMDLNavarro River Sediment—
Specific ConductivitySALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES163043List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
Temperature, waterOther Cause155308Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLNavarro River 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
CAR1135007719980709093957
CALWNUM
1113.500104, 1113.500201, 1113.500303, 1113.500304, 1113.500401, 1113.500404, 1113.500603, 1113.500703, 1113.500706, 1113.500707
WBD code
180101080401, 180101080402, 180101080403, 180101080404, 180101080405, 180101080406, 180101080407, 180101080408, 180101080409, 180101100502
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
786.12 Miles

Derived facility associations

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

Derived
Anderson Valley Brewing Company

Boonville · No Exposure Certification · 0.16 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Confluence

Philo · No Exposure Certification · 0.35 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Goldeneye

Philo · Notice of Intent · 0.11 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Greenwood Aggregates

Philo · Notice of Intent · 0.40 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Handley Cellars

Philo · No Exposure Certification · 0.09 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Husch Vineyards - Philo

Philo · No Exposure Certification · 0.24 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

I & E Lath Mill

Philo · Notice of Intent · 0.23 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Johnson Quarry

Boonville · Notice of Intent · 0.06 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Navarro Vineyards

Philo · Notice of Intent · 0.10 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Roederer Estate Inc

Philo · Notice of Intent · 0.14 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Silver Oak Wine Cellars LLC

Philo · No Exposure Certification · 0.10 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.