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Waterbody profile

Official Water Board record · 2026 cycle

San Joaquin River (Bear Creek to Mud Slough)

Waterbody ID (WBID)
CAR5357000020021002093226
County / counties
Merced
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 (10)

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
ArsenicMetals158918Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
BifenthrinPesticides158944List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
BoronMetals164092Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Electrical ConductivitySALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES76143List on 303(d) list (TMDL required list)Original5A TMDL still requiredLow
Indicator BacteriaPathogens165320Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
MercuryMetals165442Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PyrethroidsPesticides158940List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Specific ConductivitySALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES168908List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Temperature, waterOther Cause151994Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ToxicityTotal Toxics158937Do Not Delist from 303(d) list (being addressed with action other than TMDL)Revised5C 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
Sep 16, 2026, 10:57 PM UTC
Waterbody ID
CAR5357000020021002093226
CALWNUM
54120000
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
14.02 Miles

Derived facility associations

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

Derived

No industrial stormwater facility is geographically associated with this waterbody.

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.