← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Contra Costa Canal (in Delta Waterways, western portion)

Waterbody ID (WBID)
CAR5431000020230731046638
County / counties
Contra Costa
Regional Water Board
Regional Board 5 - Central Valley Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
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
pHOther Cause157013List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow

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
CAR5431000020230731046638
CALWNUM
6543.000103, 6543.000104, 6544.000000
WBD code
180400030702, 180400030803, 180400030907, 180500010301
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
10.3 Miles

Facilities with an NAL exceedance for a listed pollutant (4)

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

Antioch Unified School District5S07I006937

pH · most recent exceedance RY 2020 · association: derived watershed association

Eastern Contra Costa Transit A5S07I000196

pH · most recent exceedance RY 2015 · association: derived watershed association

Foundation Constructors Inc5S07I021633

pH · most recent exceedance RY 2017 · association: derived watershed association

Golden Gate Petroleum5S07I012265

pH · most recent exceedance RY 2022 · 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
48Forty Pallet Solutions

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

A A Auto Parts

Brentwood · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Amazon com Services LLC DFO2

Oakley · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Amazon com Services LLC SCK8

Oakley · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Amazon com Services LLC TCY9

Oakley · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

AMR Contra Costa County Antioch

Antioch · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Angel Island Co LLC dba Headlands Brewing Co

Pittsburg · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Antioch Building Material

Pittsburg · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Antioch Facility

Antioch · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Antioch Unified School District

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

BART Antioch Shop

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

BNSF Railway Pittsburg

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Brentwood Ready Mix Plant

Brentwood · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Canyon Formulations LLC

Pittsburg · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Canyon Formulations LLC

Pittsburg · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

CEMEX Construction Materials Pacific LLC

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Chemtrade West US LLC

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Concord Ready Mix Inc

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Corteva Agriscience Pittsburg Operations

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Delta Energy Ctr

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Delta Scrap and Salvage

Oakley · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Eastern Contra Costa Transit A

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Foundation Constructors Inc

Oakley · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

FTG Construction Materials Inc

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Gateway Generating Station

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Georgia Pacific Gypsum LLC

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Golden Gate Petroleum

Brentwood · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Groceryworks Operating Company LLC

Brentwood · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Hasa Inc

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Henkel Corp Aerospace Group

Bay Point · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Imperiale Beer Cafe llc

Brentwood · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Intrepid Delivery

Brentwood · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

JASS BOYS TRUCK LINES LLC

Bay Point · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Keller Canyon Landfill Co

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Kie Con Inc

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Koch Carbon LLC

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Kortick Manufacturing

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Liberty Union High School District

Brentwood · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Linde Inc

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Los Medanos Energy Center

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

MAGWATT LLC

Brentwood · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Maintenance Trans Yd

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Majestic Steel USA

Pittsburg · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Manwills Auto Wreckers

Bay Point · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Marine Emporium Boat Works

Oakley · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Masterank Wax

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Mike Asbill Painting

Brentwood · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

NuStar Logistics LP

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Pena Auto Dismantler 1 LLC

Oakley · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Recycling Zone Pittsburg

Pittsburg · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

SEG Trucking Inc

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Shell Catalysts & Technologies

Bay Point · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Signode Angleboard

Bay Point · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Silgan Containers Manu Corp

Antioch · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Steemmy Transit LLC

Antioch · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

StonCor Group Inc

Antioch · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

derived_watershed_association

Derived by California Stormwater Intelligence

TownCentre Self Storage

Brentwood · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

UPS Oakley CAOAL

Oakley · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Verco Decking Inc

Antioch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Willow Pass Warehouse

Pittsburg · No Exposure Certification

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.