California Stormwater Intelligence
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Waterbody profile

Official Water Board record · 2026 cycle

Redondo Beach

Waterbody ID (WBID)
CAX4051200019990923132934
County / counties
Los Angeles
Regional Water Board
Regional Board 4 - Los Angeles Region
Waterbody type
Coastal & Bay Shoreline
Condition category
Category 4a — TMDL completed
Integrated Report cycle
2026

303(d) listings (3)

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
DDT (Dichlorodiphenyltrichloroethane)Pesticides99471Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Original5B — Addressed by USEPA-approved TMDLSanta Monica Bay Historic Pesticides (58)—
Indicator BacteriaPathogens150318Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLSanta Monica Bay Beach Closures/Coliform/Bacteria Indicators (48)—
PCBs (Polychlorinated biphenyls)Toxic Organics70297Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Original5B — Addressed by USEPA-approved TMDLSanta Monica Bay Historic Pesticides (58)—

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
CAX4051200019990923132934
CALWNUM
4404.700000, 4411.010000, 4411.020000
WBD code
180701040500
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
2.39 Miles

Derived facility associations

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

Derived
Hyperion WWTP

Playa Del Rey · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

King Harbor Marine Ctr

Redondo Beach · Notice of Intent · 0.59 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Learned Lumber

Hermosa Beach · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Scattergood Generating Station

Playa Del Rey · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Wedges Ledges of California Inc

Redondo Beach · No Exposure Certification · 0.70 km away

derived_nearby_in_watershed

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.