Waterbody profile

Official Water Board record · 2026 cycle

Torrance Carson Channel

Waterbody ID (WBID): CAR4051200020000229130309
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
CopperMetals	138056	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Dominguez, LA/LB Harbors, San Pedro Bay Metals (75 & 78), toxics(73a) and PAHs (74)	—
Indicator BacteriaPathogens	70920	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
LeadMetals	138058	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Dominguez, LA/LB Harbors, San Pedro Bay Metals (75 & 78), toxics(73a) and PAHs (74)	—

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: CAR4051200020000229130309
CALWNUM: 4411.01
WBD code: 180701060102
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: 3.44 Miles

Facilities with an NAL exceedance for a listed pollutant (29)

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

ABL Space Systems4 19I029981

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

American Aircraft Products4 19I020268

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

California Waste Services LLC4 19I018105

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

Carson Refinery4 19I024232

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

Cast Rite Corp4 19I006973

Copper · most recent exceedance RY 2017 · association: derived watershed association

Coast Wire Plastic Tech LLC4 19I013697

Copper · most recent exceedance RY 2017 · association: derived watershed association

First Student Inc 124774 19I011377

Copper · most recent exceedance RY 2020 · association: derived watershed association

Gardena Recycling Center4 19I007284

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

Grow More Inc4 19I017633

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

L3 Harris4 19I012046

Copper · most recent exceedance RY 2020 · association: derived watershed association

Lancast Alumnium Inc4 19I014279

Copper · most recent exceedance RY 2017 · association: derived watershed association

Metro Division 224 19I011858

Copper · most recent exceedance RY 2020 · association: derived watershed association

Moog Inc Aircraft Grp Torrance4 19I011092

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

Nasco Aircraft Brake4 19I019852

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

Northrop Grumman Mil Air Sys4 19I006362

Copper · most recent exceedance RY 2023 · association: derived watershed association

Northrop Grumman S MSC4 19I017862

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

Phillips 66 Company4 19I013149

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

Ramonas Mexican Foods4 19I026449

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

S. Letvin & Son4 19I008028

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

SA Recycling4 19I021105

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

SA Recycling4 19I023158

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

Safety Kleen of California Inc4 19NEC012087

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

Seachrome Corporation4 19I027307

Copper · most recent exceedance RY 2018 · association: derived watershed association

Sonic Plating4 19I006724

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

SOS Metals Inc4 19I018360

Copper, Lead · most recent exceedance RY 2021 · association: derived watershed association

Southwest Trails4 19I004954

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

Space Lok Incorporated4 19I026487

Copper · most recent exceedance RY 2020 · association: derived watershed association

Space Lok Incorporated4 19I026488

Copper · most recent exceedance RY 2020 · association: derived watershed association

Standard Metals Recycling4 19I027723

Copper · most recent exceedance RY 2024 · 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

3D Polymers

Gardena · No Exposure Certification

derived_watershed_association