Calleguas Creek Reach 3 (Potrero Rd. to Conejo Creek)

Waterbody ID (WBID): CAR4031200020000228113723
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 (16)

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
AluminumMetals	153875	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
BifenthrinPesticides	136663	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
ChlordanePesticides	136596	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)	—
ChlorideSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES	136597	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Boron/Sulfate/TDS (4)	—
DDT (Dichlorodiphenyltrichloroethane)Pesticides	149468	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)	—
DieldrinPesticides	136608	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)	—
Indicator BacteriaPathogens	150535	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Nitrate and NitriteNutrients	68581	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Nitrogen (1)	—
PCBs (Polychlorinated biphenyls)Toxic Organics	136640	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek PCBs (7)	—
PyrethroidsPesticides	136656	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Sedimentation/SiltationSediment	69502	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
Total Dissolved SolidsSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES	136651	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Boron/Sulfate/TDS (4)	—
ToxaphenePesticides	136652	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	136653	List on 303(d) list (being addressed by USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Calleguas Creek Toxicity (2)	—
TrashTrash	75674	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
TurbiditySediment	136654	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low

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: CAR4031200020000228113723
CALWNUM: 4408.12
WBD code: 180701030105, 180701030107
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: 3.48 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

International Coffee & Tea LLC4 56I027860

Aluminum · most recent exceedance RY 2021 · association: derived watershed association

Titan Metal Fabricators4 56I026877

Aluminum · most recent exceedance RY 2017 · 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 TO B TRANSPORT

Camarillo · Notice of Non-Applicability

derived_watershed_association