Cucamonga Creek Reach 2 (Mountain Reach)

Waterbody ID (WBID): CAR8012402019991013163906
County / counties: 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	132841	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: CAR8012402019991013163906
CALWNUM: 4801.240100, 4801.240200
WBD code: 180702030704
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: 7.07 Miles

Facilities with an NAL exceedance for a listed pollutant (14)

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

Aspire Bakeries LLC8 36I029502

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

Capitol Steel Products8 36I028998

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

Classic Containers Incorporated8 36I026552

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

Frito Lay Inc8 36I000937

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

Mizkan America Inc8 36I021504

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

Ontario International Airport8 36I026885

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

Parco Inc8 36I016866

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

R F White8 36I005818

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

Searing Ind Inc8 36I014189

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

Southwest Mobile Storage8 36I030139

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

Summit Machine LLC8 36I025122

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

Superior Tank Company Inc8 36I020462

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

Target Fufilment Center Ontario8 36I017808

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

Ventura Foods LLC8 36I021200

pH · most recent exceedance RY 2015 · 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

1652 S Sacramento Avenue

Ontario · Notice of Non-Applicability

derived_watershed_association