California Stormwater Intelligence
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Waterbody profile

Official Water Board record · 2026 cycle

Suisun Slough

Waterbody ID (WBID)
CAE2072300020020315202246
County / counties
Solano
Regional Water Board
Regional Board 2 - San Francisco Bay Region
Waterbody type
Estuary
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
DiazinonPesticides69483List on 303(d) list (being addressed by USEPA approved TMDL)Original5B — Addressed by USEPA-approved TMDLSan Francisco Bay Urban Creeks Diazinon—
MercuryMetals100850List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLSuisun Marsh Dissolved Oxygen and Mercury TMDL—
Oxygen, DissolvedNutrients100851List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLSuisun Marsh Dissolved Oxygen and Mercury TMDL—
Temperature, waterOther Cause151435List on 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
Aug 21, 2026, 12:44 AM UTC
Waterbody ID
CAE2072300020020315202246
CALWNUM
2207.210400, 2207.230200
WBD code
180500010401
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
169.31 Acres

Derived facility associations

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

Derived
AAA TRANSIT, LLC

Fairfield · Notice of Non-Applicability · 0.88 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Bradbury & Bradbury Wallpapers

Benicia · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Cnty Quarry Prod

Martinez · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Conco

Benicia · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Copart Auto Auctions

Martinez · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

CubeSmart 0758

Benicia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Fernandes Auto Wreckers

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Flavor Insights

Benicia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Linde Inc

Benicia · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Union Pacific Railroad Suisun City

Suisun City · Notice of Intent · 0.70 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

USS Posco Industries West Facilities

Pittsburg · Notice of Intent

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.