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Waterbody profile

Official Water Board record · 2026 cycle

Avalon Beach

Waterbody ID (WBID)
CAX4051100020020130162914
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 (1)

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
Indicator BacteriaPathogens99413Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLAvalon Beach Bacteria Indicators (nonCD)

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
Sep 16, 2026, 10:56 PM UTC
Waterbody ID
CAX4051100020020130162914
CALWNUM
4406.4
WBD code
180701070002
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
0.86 Miles

Derived facility associations

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

Derived
Avalon Freight Service LLC

Avalon · Notice of Intent · 0.29 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Avalon WWTP

Avalon · Notice of Intent · 0.03 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Connolly Pac Co

Avalon · Notice of Intent · 0.03 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Empire Quarry

Avalon · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Pebbly Beach Landfill

Avalon · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Catalina Island Co Pebbl

Avalon · Notice of Intent · 0.03 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.