San Antonio Creek

Waterbody ID (WBID): CAR8012100019991013144655
County / counties: Los Angeles, San Bernardino
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 (1)

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
pHOther Cause	150263	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low

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: CAR8012100019991013144655
CALWNUM: 4481.210000, 4481.220000, 4481.230100, 4481.230100, 4481.230100, 4481.230200, 4801.210000, 4801.230100, 4801.230100, 4801.230100, (Total Count: 11)
WBD code: 180702030701, 180702030701, 180702030701, 180702030701, 180702030702
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: 21.57 Miles

Facilities with an NAL exceedance for a listed pollutant (6)

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

Burrtec Pomona Yard4 19I018800

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

Cal Spas4 19I000929

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

FDS Manufacturing C4 19I022928

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

Inland Envelope Company4 19I025393

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

Royal Cabinets4 19I017814

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

Siemens Industry Inc4 19I027224

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

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

A Car Auto Wrecking Inc

Montclair · Notice of Intent · 0.03 km away

derived_nearby_in_watershed