Waterbody profile

Official Water Board record · 2026 cycle

Peters Canyon Wash (Orange County)

Waterbody ID (WBID): CAR8011100020050602204221
County / counties: Orange
Regional Water Board: Regional Board 8 - Santa Ana Region
Waterbody type: River & Stream
Condition category: Category 5 — 303(d) listed, TMDL required
Integrated Report cycle: 2026

303(d) listings (9)

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
Benthic Community EffectsOther Cause	153775	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
CopperMetals	132695	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
DDT (Dichlorodiphenyltrichloroethane)Pesticides	149253	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Newport Bay Watershed Organochlorine Compounds TMDL	—
Indicator BacteriaPathogens	149168	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
MalathionPesticides	154751	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
pHOther Cause	132708	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
SeleniumMetals	132710	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	TMDLs for Selenium in Freshwater, Newport Bay Watershed	—
ToxaphenePesticides	68189	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Newport Bay Watershed Organochlorine Compounds TMDL	—
ToxicityTotal Toxics	132712	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Medium

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: CAR8011100020050602204221
CALWNUM: 4801.11
WBD code: 180702040101, 180702040103
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: 6.77 Miles

Facilities with an NAL exceedance for a listed pollutant (34)

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

ACD LLC8 30I027856

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

Active Plating Inc8 30I025244

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

Aerospace Engineering8 30I030063

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

Aluminum Precision Products8 30I004913

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

Avon Protection Systems Inc8 30I028539

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

Bowerman Power LFG LLC8 30I026433

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

Brasstech Inc8 30I018580

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

Brasstech Inc8 30I029279

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

Bruce Metal Salvage Inc8 30MR000029

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

Chromadora Inc8 30I025590

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

Durabag Co Inc8 30I022631

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

Electrolurgy Inc8 30I009573

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

Embee Processing8 30I027584

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

GCP Applied Technologies Inc8 30I026390

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

Graphic Packaging International Inc8 30I021957

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

Imuraya USA inc8 30I027304

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

Integrity Metal Inc8 30MR000082

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

Interplex Nascal Inc8 30I024652

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

JWC ENVIRONMENTAL INC8 30I028134

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

LGM Pharma Solutions LLC8 30I028907

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

Markland Manufacturing Inc8 30I012125

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

Maruchan Inc8 30I025984

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

Metal Improvement Co LLC8 30I014808

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

Mitsubishi Chemical Carbon Fiber and Composites Inc8 30I009877

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

OC John Wayne Airport8 30I005741

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

OCTA Construction Circle8 30I021186

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

Parker Hannifin Corp8 30I005869

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

PCC Rollmet Inc8 30I023346

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

Precious Metal Plating Co8 30I004149

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

Sanmina Corp8 30I017804

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

Schick Moving Storage Co8 30I002813

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

Secure Communication Systems Inc8 30I029948

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

Tibbetts Newport Corp8 30I023452

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

Toyota Racing Development USA Inc8 30I016707

Copper, pH · most recent exceedance RY 2018 · 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

3M Irvine Dental

Irvine · Notice of Intent

derived_watershed_association