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 / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
AmmoniaNutrients	127041	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Salinas River Nutrients	—
DiazinonPesticides	113717	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Lower Salinas River Chlorpyrifos and Diazinon TMDL	—
ImidaclopridPesticides	113750	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
MalathionPesticides	113729	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	High
NitrateNutrients	115466	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Salinas River Nutrients	—
ToxicityTotal Toxics	113745	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Salinas River Watershed Sediment Toxicity TMDL U.S. EPA Vision Priority	—
TurbiditySediment	113747	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	High

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: CAR3091101020090311204028
CALWNUM: 3309.11
WBD code: 180600150103
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: 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