Grant Line Canal (in Delta Waterways, southern portion)

Waterbody ID (WBID): CAR5440000020200305048918
County / counties: Contra Costa, San Joaquin
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 (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 / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
AluminumMetals	156968	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Oxygen, DissolvedNutrients	125046	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Specific ConductivitySALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES	131433	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Total Dissolved SolidsSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES	156965	Do Not Delist from 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: CAR5440000020200305048918
CALWNUM: 6544
WBD code: 180400030605
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: 7.88 Miles

Facilities with an NAL exceedance for a listed pollutant (3)

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

CMC Steel Fabricators Inc5S39I026434

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

Ferguson Fire and Fabrication 33155S39I029356

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

Lawrence Livermore National Lab5S39I021179

Aluminum · most recent exceedance RY 2015 · 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

ACCURATE DELIVERY SYSTEMS

Tracy · Notice of Non-Applicability

derived_watershed_association