← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Petaluma River (tidal portion)

Waterbody ID (WBID)
CAR2063004020020916200425
County / counties
Marin, Sonoma
Regional Water Board
Regional Board 2 - San Francisco Bay Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (4)

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
DiazinonPesticides151287Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
Indicator BacteriaPathogens149089Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLPetaluma River Bacteria TMDL—
NickelMetals151288Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
NutrientsNutrients151289Do Not Delist from 303(d) list (TMDL required list)Revised5A — 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
CAR2063004020020916200425
CALWNUM
2206.3004
WBD code
180500020801, 180500020802
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
1.79 Miles

Derived facility associations

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

Derived
Golden Gate Transit

Novato · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

North Bay Operations Maintenance

Vallejo · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Petaluma Plant

Petaluma · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Richmond Sanitary Service Inc

Richmond · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Rafael Airport

San Rafael · No Exposure Certification

derived_watershed_association

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.