← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Suisun Bay

Waterbody ID (WBID)
CAB2071002020011017135055
County / counties
Contra Costa, Solano
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 (10)

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
ChlordanePesticides141129Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
DDT (Dichlorodiphenyltrichloroethane)Pesticides151557Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
DieldrinPesticides141135Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Dioxin compounds (including 2,3,7,8-TCDD)Toxic Organics151241Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Furan CompoundsToxic Organics151243Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Invasive SpeciesOther Cause170599Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
MercuryMetals153023Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSan Francisco Bay Mercury
PCBs (Polychlorinated biphenyls)Toxic Organics141146Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSan Francisco Bay PCBs
PCBs (Polychlorinated biphenyls) (dioxin-like)Toxic Organics69794List on 303(d) list (being addressed by USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLSan Francisco Bay PCBs
SeleniumMetals141148Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSan Francisco Bay Selenium - North Bay

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
CAB2071002020011017135055
CALWNUM
2207.100000, 2207.210400, 2207.230200, 2207.240000, 2207.250000, 2207.310104, 2207.340100, 2207.400200
WBD code
180500010401, 180500010401, 180500010402, 180500010402, 180500010402, 180500010402, 180500010402, 180500010402, 180500010402, 180500010402, (Total Count: 15)
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
3805.75 Acres

Derived facility associations

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

Derived
Advanced Drainage Systems Inc

Benicia · Notice of Non-Applicability · 0.94 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Allios Inc

Benicia · No Exposure Certification · 0.80 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Alternative Biologics

Benicia · No Exposure Certification · 0.78 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

American Cabinetry

Benicia · No Exposure Certification · 0.72 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Bay Area Coffee inc

Benicia · No Exposure Certification · 0.77 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Bayshore Center

Benicia · Notice of Non-Applicability · 0.71 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

CE Toland Son

Benicia · Notice of Intent · 0.80 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Chemtrade West US LLC

Pittsburg · Notice of Intent · 0.66 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Clean Harbors Env Services Inc

Benicia · Notice of Intent · 0.59 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Custom Coils Inc

Benicia · No Exposure Certification · 0.46 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Flavor Insights

Benicia · No Exposure Certification · 0.81 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

JASS BOYS TRUCK LINES LLC

Bay Point · No Exposure Certification · 0.86 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Kaneka Aerospace LLC

Benicia · No Exposure Certification · 0.88 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Kent Odell Furniture

Benicia · No Exposure Certification · 0.71 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Lonza Consumer Health Inc - Benicia

Benicia · Notice of Non-Applicability · 0.80 km away

derived_receiving_water

Derived by California Stormwater Intelligence

MetlSaw Systems Inc

Benicia · Notice of Intent · 0.95 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Metropolitan Van and Storage

Benicia · Notice of Non-Applicability · 0.74 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Nature Health Science Inc

Benicia · Notice of Non-Applicability · 0.46 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Pacific Ozone Technologies

Benicia · No Exposure Certification · 0.87 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Pickett Racining

Benicia · Notice of Non-Applicability · 0.81 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

PJs Junk Removal

Benicia · Notice of Non-Applicability · 0.50 km away

derived_receiving_water

Derived by California Stormwater Intelligence

ProForm Laboratories

Benicia · No Exposure Certification · 0.86 km away

derived_receiving_water

Derived by California Stormwater Intelligence

REACH 032 100 - Contra Costa Concord

Concord · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Red Line Synthetic Oil Corp

Benicia · No Exposure Certification · 0.75 km away

derived_receiving_water

Derived by California Stormwater Intelligence

RIX INDUSTRIES

Benicia · No Exposure Certification · 0.66 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Schoenstein & Co

Benicia · No Exposure Certification · 0.52 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Underground Construction Co Inc

Benicia · Notice of Intent · 0.84 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Union Pacific Railroad Benicia

Benicia · Notice of Intent · 0.54 km away

derived_receiving_water

Derived by California Stormwater Intelligence

USS Posco Industries West Facilities

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Wear Ever Mfg

Benicia · No Exposure Certification · 0.75 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Zephyr Express

Benicia · No Exposure Certification · 0.81 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.