Santa Ana River, Reach 4

Waterbody ID (WBID): CAR8012700019990211142130
County / counties: Riverside, 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 (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
DDT (Dichlorodiphenyltrichloroethane)Pesticides	149276	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Indicator BacteriaPathogens	149175	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Oil and GreaseNuisance	132875	List on 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: CAR8012700019990211142130
CALWNUM: 4801.270000, 4801.440000
WBD code: 180702030804
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: 7.42 Miles

Facilities with an NAL exceedance for a listed pollutant (8)

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

Americold Logistics LLC8 36I028754

Oil and Grease · most recent exceedance RY 2020 · association: derived watershed association

California Churros8 36I024211

Oil and Grease · most recent exceedance RY 2015 · association: derived receiving water

Continental Coating8 36I011617

Oil and Grease · most recent exceedance RY 2019 · association: derived watershed association

EquipmentShare8 36I029500

Oil and Grease · most recent exceedance RY 2023 · association: derived watershed association

Forged Metals8 36I007116

Oil and Grease · most recent exceedance RY 2015 · association: derived watershed association

Gerard Daniel Worldwide8 36I023390

Oil and Grease · most recent exceedance RY 2019 · association: derived watershed association

Walmart DC 70848 33I029937

Oil and Grease · most recent exceedance RY 2022 · association: derived watershed association

West Valley MRF8 36I013750

Oil and Grease · most recent exceedance RY 2022 · 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

101 Vertical Fabrication Inc

Fontana · Notice of Intent

derived_watershed_association