California Stormwater Intelligence
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Waterbody profile

Official Water Board record · 2026 cycle

Sulphur Creek, lower (Napa County)

Waterbody ID (WBID)
CAR2065004020000320133924
County / counties
Napa
Regional Water Board
Regional Board 2 - San Francisco Bay Region
Waterbody type
River & Stream
Condition category
Category 4a — TMDL completed
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 / stressorDecision IDFinal listing decisionDecision statusTMDL requirement statusTMDL projectTMDL priority
Indicator BacteriaPathogens148822List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLNapa River Pathogens—

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
CAR2065004020000320133924
CALWNUM
20650040
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
1.01 Miles

Derived facility associations

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

Derived
Leonardini Family Winery LLC

Saint Helena · No Exposure Certification · 0.76 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Merryvale Vineyards

Saint Helena · Notice of Intent · 0.12 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Prager Winery & Port Works

Napa · No Exposure Certification · 0.30 km away

derived_receiving_water

Derived by California Stormwater Intelligence

St Helena RMC

Saint Helena · Notice of Intent · 0.36 km away

derived_receiving_water

Derived by California Stormwater Intelligence

The Napa Valley Reserve

Saint Helena · Notice of Intent · 0.85 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.