Espinosa Slough

Waterbody ID (WBID): CAR3091101019981230135152
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 (11)

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	126551	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Salinas River Nutrients	—
BifenthrinPesticides	108136	List on 303(d) list (being addressed by USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Salinas River Watershed Sediment Toxicity TMDL U.S. EPA Vision Priority	—
DiazinonPesticides	108100	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	—
MalathionPesticides	108112	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	High
NitrateNutrients	125821	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Salinas River Nutrients	—
PesticidesPesticides	77746	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
pHOther Cause	108123	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Priority OrganicsToxic Organics	69063	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
PyrethroidsPesticides	108132	List on 303(d) list (being addressed by USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Salinas River Watershed Sediment Toxicity TMDL U.S. EPA Vision Priority	—
ToxicityTotal Toxics	108128	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	108130	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: Aug 21, 2026, 12:44 AM UTC
Waterbody ID: CAR3091101019981230135152
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.

Loading map…

Watershed: —
Assessed size: 1 Miles

Facilities with an NAL exceedance for a listed pollutant (2)

Geographically associated industrial stormwater facilities whose reported results exceeded an Industrial General Permit Numeric Action Level for a pollutant this waterbody is listed for.

Derived

North Monterey County Unified School District3 27I017920

pH · most recent exceedance RY 2018 · association: derived watershed association

Peninsula Auto Dismantlers3 27I023275

pH · most recent exceedance RY 2022 · association: derived watershed association

This is derived co-occurrence between a calculated NAL comparison and the official 303(d) listing for this waterbody. An NAL exceedance triggers Exceedance Response Actions under the permit; it is not a violation and does not establish that any facility caused or contributed to this impairment.

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