Waterbody profile

Official Water Board record · 2026 cycle

San Gabriel River Reach 2 (Firestone to Whittier Narrows Dam

Waterbody ID (WBID): CAR4051501019980917150749
County / counties: Los Angeles
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 (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 / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
AluminumMetals	153903	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
CyanideToxic Inorganics	138271	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Indicator BacteriaPathogens	150326	List on 303(d) list (being addressed by USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	San Gabriel River Coliform (45)	—

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: CAR4051501019980917150749
CALWNUM: 4405.15
WBD code: 180701060606
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: 10.6 Miles

Facilities with an NAL exceedance for a listed pollutant (21)

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

Aerotec Alloys4 19I020661

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

Albert Industries LTD dba Superior Handforge4 19I027137

Aluminum · most recent exceedance RY 2024 · association: derived watershed association

Astro Pak Corporation4 19I002927

Aluminum · most recent exceedance RY 2025 · association: derived receiving water

Bodycote Thermal Processing4 19I023136

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

Boeing EnCore Interiors LLC8 30I028222

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

CJI Process Systems4 19I029469

Aluminum · most recent exceedance RY 2022 · association: derived watershed association

De La Rosa Manufacturing Inc4 19I023218

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

Fortune Metal Inc of RI4 19I024809

Aluminum · most recent exceedance RY 2021 · association: derived watershed association

International Paper Norwalk Recycling4 19I021726

Aluminum · most recent exceedance RY 2021 · association: derived watershed association

Kelly Pipe Co4 19I006987

Aluminum · most recent exceedance RY 2022 · association: derived watershed association

Lee Ray Sandblasting and Coating4 19I025294

Aluminum · most recent exceedance RY 2024 · association: derived watershed association

Olin Chlor Alkali Products4 19I000869

Aluminum · most recent exceedance RY 2022 · association: derived watershed association

Pico Rivera Plating Inc4 19I004295

Aluminum · most recent exceedance RY 2016 · association: derived receiving water

Premier Wheels Protire Inc4 19I018780

Aluminum · most recent exceedance RY 2015 · association: derived watershed association

Puente Hills Materials Recovery Facility4 19I019265

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

REVCO SPRING MFG INC4 19I027916

Aluminum · most recent exceedance RY 2022 · association: derived nearby in watershed

Santa Fe Auto Salvage4 19I001451

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

Serrano Industries Inc4 19I018818

Aluminum · most recent exceedance RY 2024 · association: derived watershed association

Sika Corp SFS4 19I001199

Aluminum · most recent exceedance RY 2024 · association: derived watershed association

Votaw Precision Corp4 19I000642

Aluminum · most recent exceedance RY 2022 · association: derived watershed association

Westmont Industries4 19I015520

Aluminum · most recent exceedance RY 2020 · 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

3C Delivery Corp

Santa Fe Springs · No Exposure Certification · 0.91 km away

derived_nearby_in_watershed