Waterbody profile

Official Water Board record · 2026 cycle

Stege Marsh

Waterbody ID (WBID): CAE2033001120020129144149
County / counties: Contra Costa
Regional Water Board: Regional Board 2 - San Francisco Bay Region
Waterbody type: Estuary
Condition category: Category 4b — Other control measures expected to attain standards
Integrated Report cycle: 2026

303(d) listings (6)

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
CopperMetals	153860	List on 303(d) list (being addressed by action other than TMDL)	Revised	5C — Addressed by action other than a TMDL	—	—
DacthalPesticides	153861	List on 303(d) list (being addressed by action other than TMDL)	Revised	5C — Addressed by action other than a TMDL	—	—
DieldrinPesticides	153862	Do Not Delist from 303(d) list (being addressed with action other than TMDL)	Revised	5C — Addressed by action other than a TMDL	—	—
MercuryMetals	153863	List on 303(d) list (being addressed by action other than TMDL)	Revised	5C — Addressed by action other than a TMDL	—	—
PCBs (Polychlorinated biphenyls)Toxic Organics	153864	Do Not Delist from 303(d) list (being addressed with action other than TMDL)	Revised	5C — Addressed by action other than a TMDL	—	—
ZincMetals	153865	List on 303(d) list (being addressed by action other than TMDL)	Revised	5C — Addressed by action other than a TMDL	—	—

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: CAE2033001120020129144149
CALWNUM: 2203.300001
WBD code: 180500020904, 180500021001
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.

Loading map…

Watershed: —
Assessed size: 4.37 Acres

Facilities with an NAL exceedance for a listed pollutant (22)

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

All Import Auto Salvage2 01I019340

Copper · most recent exceedance RY 2023 · association: derived watershed association

Bay Marine Boatworks2 07I001646

Copper, Zinc · most recent exceedance RY 2025 · association: derived watershed association

Bayside Boatworks Inc2 21I014602

Copper, Zinc · most recent exceedance RY 2025 · association: derived watershed association

Berkeley Marine Ctr Inc2 01I014543

Copper · most recent exceedance RY 2025 · association: derived watershed association

Bio Rad Laboratories2 07I003159

Zinc · most recent exceedance RY 2023 · association: derived nearby in watershed

California Casting Inc2 07I001484

Copper, Zinc · most recent exceedance RY 2021 · association: derived watershed association

California Waste Solutions2 01I026766

Zinc · most recent exceedance RY 2022 · association: derived watershed association

CASS Inc2 01I007363

Copper · most recent exceedance RY 2022 · association: derived watershed association

CCY INC2 01I013302

Zinc · most recent exceedance RY 2018 · association: derived watershed association

Coulter Forge Tech Inc2 01I018324

Zinc · most recent exceedance RY 2024 · association: derived watershed association

Davlin Coatings LLC2 01I022933

Zinc · most recent exceedance RY 2025 · association: derived watershed association

Electro Coating2 01I007260

Copper, Zinc · most recent exceedance RY 2025 · association: derived watershed association

Keefe Kaplan Maritime Inc2 07I014565

Copper, Zinc · most recent exceedance RY 2021 · association: derived watershed association

KKMI Sausalito LLC2 21I022576

Copper, Zinc · most recent exceedance RY 2024 · association: derived watershed association

KMCK LLC dba Paradise Cay Yacht Harbor2 21I024859

Zinc · most recent exceedance RY 2022 · association: derived watershed association

Marin Sanitary Service2 21I000154

Copper, Zinc · most recent exceedance RY 2023 · association: derived watershed association

Metro Cruise Services LLC2 38I025046

Zinc · most recent exceedance RY 2019 · association: derived watershed association

National Recycling Corp2 01I013217

Zinc · most recent exceedance RY 2016 · association: derived watershed association

Sause Brothers Ocean Towing Company Inc2 07NEC011280

Zinc · most recent exceedance RY 2021 · association: derived watershed association

SMM Richmond2 07I005110

Copper, Zinc · most recent exceedance RY 2016 · association: derived watershed association

Spaulding Wooden Boat Center2 21I014618

Copper, Zinc · most recent exceedance RY 2025 · association: derived watershed association

UPS San Rafael CASRA2 21I002099

Zinc · most recent exceedance RY 2019 · association: derived watershed association

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

10 Roads Express LLC

Oakland · Notice of Intent

derived_watershed_association