Waterbody profile

Official Water Board record · 2026 cycle

Dominguez Channel (lined portion above Vermont Ave)

Waterbody ID (WBID): CAR4051200019980918161017
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 (6)

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	153898	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
CopperMetals	72474	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Dominguez, LA/LB Harbors, San Pedro Bay Metals (75 & 78), toxics(73a) and PAHs (74)	—
Indicator BacteriaPathogens	68243	Do Not Delist from 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	High
LeadMetals	98867	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Dominguez, LA/LB Harbors, San Pedro Bay Metals (75 & 78), toxics(73a) and PAHs (74)	—
ToxicityTotal Toxics	76424	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Dominguez, LA/LB Harbors, San Pedro Bay Metals (75 & 78), toxics(73a) and PAHs (74)	—
ZincMetals	68450	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Original	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: CAR4051200019980918161017
CALWNUM: 4411.01
WBD code: 180701060101, 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.

Loading map…

Watershed: —
Assessed size: 6.77 Miles

Facilities with an NAL exceedance for a listed pollutant (83)

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

AA Ready Mixed Concrete4 19I007120

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

ABL Space Systems4 19I029981

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

ABL Space Systems4 19I030020

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

Aero Electric Connector Inc4 19I019690

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

Air Products and Chemicals Inc4 19I015488

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

Airgas USA LLC dba Airgas Dry Ice4 19I021221

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

American Aircraft Products4 19I020268

Aluminum, Copper, Zinc · most recent exceedance RY 2020 · association: derived watershed association

Anvil Steel Corporation4 19I027651

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

Arktura LLC4 19I029124

Aluminum, Zinc · most recent exceedance RY 2023 · association: derived nearby in watershed

ARTO BRICK VENEER MFG CO4 19I027719

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

B&H Auto Parts Inc4 19I029814

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

Bay Cities Metal Production4 19I015609

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

Binder Metal Products Inc4 19I009247

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

Brek Manufacturing4 19I027755

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

Brek Manufacturing4 19I027754

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

California Waste Services LLC4 19I018105

Aluminum, Lead, Zinc · most recent exceedance RY 2018 · association: derived watershed association

Carson Refinery4 19I024232

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

Cast Rite Corp4 19I006973

Aluminum, Copper, Zinc · most recent exceedance RY 2018 · association: derived watershed association

CK Steel4 19I026356

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

Coast Wire Plastic Tech LLC4 19I013697

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

Designed Metal Connections4 19I019473

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

Ducommun AeroStructures Inc4 19I000528

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

Ducommun AeroStructures Inc4 19I000525

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

Ed Iskenderian Racing Cams Incorporated4 19I029866

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

First Student Inc 124774 19I011377

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

FORTRESS RESOURCES LLC dba ROYAL TRUCK BODY4 19I028315

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

Gardena Recycling Center4 19I007284

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

Grow More Inc4 19I017633

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

Interplastic Corp4 19I000862

Zinc · most recent exceedance RY 2023 · association: derived nearby in watershed

Jones Chemicals Inc4 19I000723

Aluminum · most recent exceedance RY 2025 · 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

Linde Inc4 19I001017

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

Linde Inc4 19I013455

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

Los Angeles International Airport4 19I004995

Aluminum, Copper, Zinc · most recent exceedance RY 2024 · association: derived watershed association

MacSmith Corporation4 19I029072

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

Main St Auto Dismantlers Inc4 19I022570

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

Maya Steel Fabrications Inc4 19I022633

Aluminum, Zinc · most recent exceedance RY 2020 · association: derived watershed association

Mechanical Metal Finishing4 19I000043

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

Merle Norman4 19I009217

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

Messer LLC4 19I009867

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

Metro Division 224 19I011858

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

Mills Iron Works4 19I006665

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

Moog Inc Aircraft Grp Torrance4 19I011092

Aluminum, Copper, Zinc · most recent exceedance RY 2019 · association: derived watershed association

Nalco Co4 19I019087

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

Nasco Aircraft Brake4 19I019852

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

National Technical Systems Inc4 19I019183

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

North Star Acquisition Inc4 19I023611

Aluminum, Zinc · most recent exceedance RY 2018 · 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, Zinc · most recent exceedance RY 2025 · association: derived watershed association

OSI Optoelectronics Inc4 19I016662

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

PB Fasteners Inc4 19I023455

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

Phillips 66 Company4 19I013149

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

Plaskolite West Inc4 19I015979

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

Plasma Technology Inc4 19I019839

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

Quality Forming LLC4 19I023557

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

Ramonas Mexican Foods4 19I026449

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

ReadyRefresh Gardena4 19I025627

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

Research Metal Industries Incorporated4 19I028559

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

S. Letvin & Son4 19I008028

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

SA Recycling4 19I021105

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

SA Recycling4 19I023158

Aluminum, Copper, Zinc · most recent exceedance RY 2024 · association: derived watershed association

Safety Kleen of California Inc4 19NEC012087

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

Seachrome Corporation4 19I027307

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

SMS Transportation Services4 19I022937

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

Sonic Industries4 19I016724

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

Sonic Plating4 19I006724

Aluminum, Copper, Zinc · most recent exceedance RY 2024 · association: derived watershed association

SOS Metals Inc4 19I018360

Aluminum, Copper, Lead, Zinc · most recent exceedance RY 2025 · association: derived watershed association

Southwest Trails4 19I004954

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

Space Lok Incorporated4 19I026488

Aluminum, Copper, Zinc · most recent exceedance RY 2020 · association: derived watershed association

Space Lok Incorporated4 19I026487

Aluminum, Copper, Zinc · most recent exceedance RY 2020 · association: derived watershed association

Spectrum Laboratory Prod Inc4 19I012361

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

Stabond Corp4 19I004462

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

Standard Metals Recycling4 19I027723

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

Superior Metal Finishing4 19I003738

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

Thermal Equipment Corporation4 19I027285

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

Tubular Specialties Manufacturing4 19I026752

Aluminum, Zinc · most recent exceedance RY 2017 · association: derived watershed association

UPS Gardena Hub CAGAR4 19I002090

Zinc · most recent exceedance RY 2017 · association: derived nearby in watershed

Valence Surface Technologies dba Coast Plating4 19I026586

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

Valmont Coatings Incorporated4 19I015094

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

Virco Manufacturing Corp4 19I011128

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

Washington Ornamental Iron Works4 19I001830

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

Waste Resources Recovery4 19I020140

Zinc · most recent exceedance RY 2025 · 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