Waterbody profile

Official Water Board record · 2026 cycle

El Dorado Lakes

Waterbody ID (WBID): CAL4051501020000228153407
County / counties: Los Angeles
Regional Water Board: Regional Board 4 - Los Angeles Region
Waterbody type: Lake & Reservoir
Condition category: Category 4a — TMDL completed
Integrated Report cycle: 2026

303(d) listings (7)

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
AlgaeNutrients	69508	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Echo, Lincoln, Peck, Calabasas Eutrophications (17) and Trash (16)	—
AmmoniaNutrients	72694	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Echo, Lincoln, Peck, Calabasas Eutrophications (17) and Trash (16)	—
CopperMetals	70468	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Echo, Lincoln, Peck, Calabasas Eutrophications (17) and Trash (16)	—
EutrophicNutrients	70588	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Echo, Lincoln, Peck, Calabasas Eutrophications (17) and Trash (16)	—
LeadMetals	70191	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Echo, Lincoln, Peck, Calabasas Eutrophications (17) and Trash (16)	—
MercuryMetals	149535	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Echo, Lincoln, Peck, Calabasas Eutrophications (17) and Trash (16)	—
pHOther Cause	77420	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Echo, Lincoln, Peck, Calabasas Eutrophications (17) and Trash (16)	—

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: CAL4051501020000228153407
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: 29.36 Acres

Facilities with an NAL exceedance for a listed pollutant (35)

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

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

Albert Industries LTD dba Superior Handforge4 19I027137

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

Amazon com Services Inc LAX58 30I027603

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

Arrowhead Products8 30I001207

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

Bodycote Thermal Processing4 19I023136

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

Bottling Group LLC8 30I018699

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

Bumble Bee Foods LLC4 19I018879

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

CA Army National Guard Los Alamitos8 30I013435

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

California Box Co4 19I022432

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

Cavotec USA8 30I024632

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

Continental Heat Treating Inc4 19I000552

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

Day Lee Foods Inc4 19I020476

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

Fortune Metal Inc of RI4 19I024809

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

Ganahl Lumber8 30I024055

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

Goodrich Corporation4 19I002692

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

Heraeus Precious Metals North America LLC4 19I015954

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

International Paper Norwalk Recycling4 19I021726

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

International Silicone Technologies Inc4 19I029786

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

Kelly Pipe Co4 19I006987

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

LACSD Puente Hills Landfill4 19I006191

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

MEC Manufacturing LLC4 19I030068

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

Miller Castings Inc4 19I024769

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

Miller Castings Inc4 19I022672

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

New Indy TriPAQ LLC4 19I028572

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

Philatron Wire Cable4 19I023391

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

Puente Hills Materials Recovery Facility4 19I019265

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

Robertsons Ready Mix Santa Fe Springs4 19I011157

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

Santa Fe Auto Salvage4 19I001451

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

Sika Corp SFS4 19I001199

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

Sun Chemical4 19I018246

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

T Hasegawa4 19I028432

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

TROJAN BATTERY COMPANY4 19I024324

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

Turbine Engine Components Tech4 19I016865

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

Votaw Precision Corp4 19I000642

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

Westmont Industries4 19I015520

Lead · 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

derived_watershed_association