← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Las Virgenes Creek

Waterbody ID (WBID)
CAR4042201019990201141611
County / counties
Los Angeles, 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 (12)

Each row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.

Pollutant / stressorDecision IDFinal listing decisionDecision statusTMDL requirement statusTMDL projectTMDL priority
Benthic Community EffectsOther Cause151618Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLMalibu Lagoon Benthic Comm. Effects (71)
Indicator BacteriaPathogens150294Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLMalibu Pathogens (47 in part)
Invasive SpeciesOther Cause76593List on 303(d) list (TMDL required list)Original5A TMDL still requiredLow
Nutrients (Algae)Nutrients70129List on 303(d) list (being addressed by USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLMalibu Creek Nutrients (50)
Organic Enrichment/Low Dissolved OxygenNutrients76719Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLMalibu Creek Nutrients (50)
Oxygen, DissolvedNutrients151902Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLMalibu Creek Nutrients (50)
Scum/Foam-unnaturalNuisance76040List on 303(d) list (being addressed by USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLMalibu Creek Nutrients (50)
Sedimentation/SiltationSediment78749List on 303(d) list (being addressed by USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLMalibu Lagoon Benthic Comm. Effects (71)
SeleniumMetals137602Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
SulfatesToxic Inorganics137605List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Total Dissolved SolidsSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES137608List on 303(d) list (being addressed by USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLMalibu Lagoon Benthic Comm. Effects (71)
TrashTrash69504List on 303(d) list (being addressed by USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLMalibu Creek Watershed Trash (63)

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
CAR4042201019990201141611
CALWNUM
4404.210000, 4404.220100, 4404.220200
WBD code
180701040103, 180701040104
Geometry
Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

Location

Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.

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Watershed
Assessed size
11.82 Miles

Derived facility associations

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

Derived
LA Cnty San Dist Calabasas Landfill

Agoura · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Maintenance Yard

Calabasas · Notice of Intent · 0.25 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Tapia WRF

Calabasas · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Facility records are official Industrial General Permit registrations, but the association between a facility and this waterbody is derived geographically (proximity or shared HUC12 subwatershed) and is not a Water Board receiving-water determination. Where a permit carries a Water Board-stated TMDL requirement naming this water, it is listed separately above.