← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Artesia-Norwalk Drain

Waterbody ID (WBID)
CAR4051501020081010131508
County / counties
Los Angeles, Orange
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 / stressorDecision IDFinal listing decisionDecision statusTMDL requirement statusTMDL projectTMDL priority
Indicator BacteriaPathogens71906List on 303(d) list (being addressed by USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLSan Gabriel River Coliform (45)
SeleniumMetals70998List on 303(d) list (TMDL required list)Original5A TMDL still requiredLow

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
CAR4051501020081010131508
CALWNUM
40515010
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
2.52 Miles

Derived facility associations

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

Derived
Ganahl Lumber

Los Alamitos · Notice of Intent · 0.78 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Kelleys Kookies

Los Alamitos · No Exposure Certification · 0.88 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Los Alamitos Unified School District

Los Alamitos · Notice of Intent · 0.67 km away

derived_receiving_water

Derived by California Stormwater Intelligence

MedisourceRx

Los Alamitos · No Exposure Certification · 0.84 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Mittera California

Los Alamitos · Notice of Intent · 0.85 km away

derived_receiving_water

Derived by California Stormwater Intelligence

PL Machine Corp

Los Alamitos · Notice of Intent · 0.83 km away

derived_receiving_water

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.