Duck Pond Agricultural Drains/Mugu Drain/Oxnard Drain No 2

Waterbody ID (WBID): CAR4031100020000228145414
County / counties: Ventura
Regional Water Board: Regional Board 4 - Los Angeles 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 / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
BifenthrinPesticides	136461	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
ChemAPesticides	68974	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Historic Pesticides (5)	—
ChlordanePesticides	136441	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Historic Pesticides (5)	—
ChlorpyrifosPesticides	136442	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Toxicity (2)	—
CyfluthrinPesticides	136465	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
CypermethrinPesticides	136462	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
DDD (Dichlorodiphenyldichloroethane)Pesticides	85873	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Historic Pesticides (5)	—
DDE (Dichlorodiphenyldichloroethylene)Pesticides	99641	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Historic Pesticides (5)	—
DDT (Dichlorodiphenyltrichloroethane)Pesticides	149530	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Historic Pesticides (5)	—
DeltamethrinPesticides	136466	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
FenpropathrinPesticides	152530	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
MalathionPesticides	136451	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
NitrogenNutrients	68859	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Nitrogen (1)	—
Nitrogen, NitrateNutrients	149529	List on 303(d) list (being addressed by USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Nitrogen (1)	—
Organophosphate PesticidesPesticides	136453	List on 303(d) list (being addressed by USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Toxicity (2)	—
PermethrinPesticides	136467	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
PyrethroidsPesticides	136460	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
SeleniumMetals	136456	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
ToxaphenePesticides	136458	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Historic Pesticides (5)	—
ToxicityTotal Toxics	69177	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Toxicity (2)	—

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: CAR4031100020000228145414
CALWNUM: 4408.110000, 4408.130000
WBD code: 180701030107, 180701030201
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: 11.97 Miles

Derived facility associations

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

Derived

501 Del Norte Blvd

Oxnard · Notice of Intent

derived_watershed_association