Suisun Marsh Wetlands

Waterbody ID (WBID): CAT2072400019980929145809
County / counties: Solano
Regional Water Board: Regional Board 2 - San Francisco Bay Region
Waterbody type: Wetland, Tidal
Condition category: Category 5 — 303(d) listed, TMDL required
Integrated Report cycle: 2026

303(d) listings (5)

Each row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.

Pollutant / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
MercuryMetals	153024	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Suisun Marsh Dissolved Oxygen and Mercury TMDL	—
NutrientsNutrients	151291	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Organic Enrichment/Low Dissolved OxygenNutrients	78582	List on 303(d) list (being addressed by USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Suisun Marsh Dissolved Oxygen and Mercury TMDL	—
Salinity/TDS/ChloridesSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES	151292	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Temperature, waterOther Cause	151500	List on 303(d) list (TMDL required list)	Revised	5A — 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: CAT2072400019980929145809
CALWNUM: 2207.100000, 2207.210301, 2207.210400, 2207.230200, 2207.240000, 2207.250000, 2207.260000
WBD code: 180500010106, 180500010107, 180500010108, 180500010108, 180500010108, 180500010109, 180500010401, 180500010402, 180500010402, 180500010402, (Total Count: 11)
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: 66339.12 Acres

Facilities with an NAL exceedance for a listed pollutant (1)

Geographically associated industrial stormwater facilities whose reported results exceeded an Industrial General Permit Numeric Action Level for a pollutant this waterbody is listed for.

Derived

Suisun Bay Reserve Fleet2 48I022609

Mercury · most recent exceedance RY 2018 · association: derived nearby in watershed

This is derived co-occurrence between a calculated NAL comparison and the official 303(d) listing for this waterbody. An NAL exceedance triggers Exceedance Response Actions under the permit; it is not a violation and does not establish that any facility caused or contributed to this impairment.

Derived facility associations

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

Derived

2112 Management DBA The Junkluggers of Contra Costa and Solano West

Benicia · Notice of Non-Applicability

derived_watershed_association