Merrit Ditch

Waterbody ID (WBID): CAR3091101020080604152147
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 (14)

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	126609	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Salinas River Nutrients	—
BifenthrinPesticides	112695	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	—
ClothianidinPesticides	112710	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
CopperMetals	112658	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
CypermethrinPesticides	144968	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	112659	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	—
Escherichia coli (E. coli)Pathogens	125800	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
MalathionPesticides	112671	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	High
NitrateNutrients	126823	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Salinas River Nutrients	—
PermethrinPesticides	112709	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	—
pHOther Cause	112682	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
PyrethroidsPesticides	112691	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	112687	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	112689	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: CAR3091101020080604152147
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: 0.45 Miles

Facilities with an NAL exceedance for a listed pollutant (4)

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

Carmel Marina Corp3 27I017456

Copper · most recent exceedance RY 2015 · association: derived nearby in watershed

Keith Day Company Inc3 27I024222

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

North Monterey County Unified School District3 27I017920

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

Peninsula Auto Dismantlers3 27I023275

Copper, 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 · 0.34 km away

derived_nearby_in_watershed