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Waterbody profile

Official Water Board record · 2026 cycle

Old Salinas River

Waterbody ID (WBID)
CAR3091101020080611145518
County / counties
Monterey
Regional Water Board
Regional Board 3 - Central Coast Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (20)

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
AmmoniaNutrients127253List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Nutrients
BifenthrinPesticides112846List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Watershed Sediment Toxicity TMDL U.S. EPA Vision Priority
Chlorophyll-aNutrients126029Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLSalinas River Nutrients
ChlorpyrifosPesticides112817Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLLower Salinas River Chlorpyrifos and Diazinon TMDL
CopperMetals112818List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Cyhalothrin, LambdaPesticides112858List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Watershed Sediment Toxicity TMDL U.S. EPA Vision Priority
DDD (Dichlorodiphenyldichloroethane)Pesticides130057List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
DDE (Dichlorodiphenyldichloroethylene)Pesticides130116List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
DiazinonPesticides112819Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLLower Salinas River Chlorpyrifos and Diazinon TMDL
ImidaclopridPesticides112842List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
MalathionPesticides112826List on 303(d) list (TMDL required list)Revised5A TMDL still requiredHigh
NickelMetals112828List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
NitrateNutrients128294Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Nutrients
Oxygen, DissolvedNutrients112832Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Nutrients
PermethrinPesticides112867List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Watershed Sediment Toxicity TMDL U.S. EPA Vision Priority
pHOther Cause112833Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PyrethroidsPesticides112839List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Watershed Sediment Toxicity TMDL U.S. EPA Vision Priority
SeleniumMetals112835List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ToxicityTotal Toxics112836Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Watershed Sediment Toxicity TMDL U.S. EPA Vision Priority
TurbiditySediment126045Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredHigh

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, 10:56 PM UTC
Waterbody ID
CAR3091101020080611145518
CALWNUM
30911010
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
3.84 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.