La Vista Drain (Ventura County)

Waterbody ID (WBID): CAR4036100020110721205251
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 (2)

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	153930	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
FenpropathrinPesticides	152765	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: CAR4036100020110721205251
CALWNUM: 4408.110000, 4408.210000
WBD code: 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: 2.17 Miles

Facilities with an NAL exceedance for a listed pollutant (7)

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

540 Spectrum Cr4 56I027790

Aluminum · most recent exceedance RY 2025 · association: derived watershed association

Aluminum Precision Prod4 56I017709

Aluminum · most recent exceedance RY 2016 · association: derived watershed association

Del Norte Regional MRF4 56I024943

Aluminum · most recent exceedance RY 2023 · association: derived watershed association

Galaxy Place4 56I027758

Aluminum · most recent exceedance RY 2025 · association: derived watershed association

Haas Automation4 56I013989

Aluminum · most recent exceedance RY 2019 · association: derived watershed association

Naval Base Ventura County Point Mugu4 56I000859

Aluminum · most recent exceedance RY 2016 · association: derived watershed association

WESTERN SAW MANUFACTURERS INC4 56I029854

Aluminum · most recent exceedance RY 2025 · 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

501 Del Norte Blvd

Oxnard · Notice of Intent

derived_watershed_association