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Waterbody profile

Official Water Board record · 2026 cycle

Alisal Slough (Monterey County)

Waterbody ID (WBID)
CAR3091101020090311204028
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 (7)

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
AmmoniaNutrients127041Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Nutrients
DiazinonPesticides113717Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLLower Salinas River Chlorpyrifos and Diazinon TMDL
ImidaclopridPesticides113750List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
MalathionPesticides113729List on 303(d) list (TMDL required list)Revised5A TMDL still requiredHigh
NitrateNutrients115466Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLSalinas River Nutrients
ToxicityTotal Toxics113745Do 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
TurbiditySediment113747Do 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
Aug 21, 2026, 12:44 AM UTC
Waterbody ID
CAR3091101020090311204028
CALWNUM
3309.11
WBD code
180600150103
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
10.93 Miles

Derived facility associations

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

Derived
A and S Metals

Castroville · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Amercian Bottling Co

Castroville · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

American Cooling Inc SEMCO

Salinas · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Associated Tagline

Salinas · Notice of Intent · 0.59 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Bimbo Bakeries USA Inc Castroville Sales Center

Castroville · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Carmel Marina Corp

Castroville · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Cemex

Marina · Notice of Intent · 0.31 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Hanbit Enterprises Inc dba Jack and the Beanstalk

Salinas · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Keith Day Company Inc

Salinas · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Monterey Farms Inc

Salinas · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Monterey Salinas Transit

Salinas · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

derived_watershed_association

Derived by California Stormwater Intelligence

Peninsula Auto Dismantlers

Prunedale · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

derived_watershed_association

Derived by California Stormwater Intelligence

Salinas Recycling Inc

Salinas · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Salinas Union High School District

Salinas · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clara Transfer Service

Castroville · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sun Street Transfer Station

Salinas · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

UPS Salinas Center CASAL

Salinas · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Valley Pacific Petroleum Salinas

Salinas · 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.