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Waterbody profile

Official Water Board record · 2026 cycle

San Joaquin River (Tuolumne River to Stanislaus River)

Waterbody ID (WBID)
CAR5353000020041020143854
County / counties
San Joaquin, Stanislaus
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 / stressorDecision IDFinal listing decisionDecision statusTMDL requirement statusTMDL projectTMDL priority
Group A PesticidesPesticides164532Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
MercuryMetals169306Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Temperature, waterOther Cause77750Do Not Delist from 303(d) list (TMDL required list)Original5A TMDL still requiredLow
ToxicityTotal Toxics158864Do Not Delist from 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
CAR5353000020041020143854
CALWNUM
6535.300000, 6535.500000, 6541.100000
WBD code
180400020503, 180400030202
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
8.93 Miles

Derived facility associations

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

Derived
Trinidad Benham Corp Vernalis Bulk

Vernalis · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Trinidad Benham Corp Vernalis Packaging

Vernalis · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Valley Rock Quarry

Tracy · Notice of Intent

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.