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Waterbody profile

Official Water Board record · 2026 cycle

Tomales Bay

Waterbody ID (WBID)
CAB2011403319980929125721
County / counties
Marin
Regional Water Board
Regional Board 2 - San Francisco Bay Region
Waterbody type
Bay & Harbor
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
Indicator BacteriaPathogens149036Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLTomales Bay Pathogens
MercuryMetals152861Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLTomales Bay Mercury
NutrientsNutrients151202Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
SedimentSediment151397Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow

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
Aug 21, 2026, 12:44 AM UTC
Waterbody ID
CAB2011403319980929125721
CALWNUM
1115.300002, 1115.300002, 2201.110000, 2201.120301, 2201.120302, 2201.120303, 2201.130301, 2201.140000, 2201.210002, 2201.210002
WBD code
180500050304, 180500050305, 180500050400
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
1296.81 Acres

Derived facility associations

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

Derived
Fisher Smith Boatworks

Marshall · Notice of Intent · 0.31 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.