Chino Creek Reach 1B (Mill Creek confl to start of concrete lined channel)

Waterbody ID (WBID): CAR8012100020080715104015
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 (6)

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
BifenthrinPesticides	133192	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Chemical oxygen demand (COD)Other Cause	99809	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
Indicator BacteriaPathogens	149139	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Middle Santa Ana River Watershed Bacterial Indicator TMDLs	—
NutrientsNutrients	77154	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
PyrethroidsPesticides	133189	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
ToxicityTotal Toxics	133188	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: CAR8012100020080715104015
CALWNUM: 4801.21
WBD code: 180702030703, 180702030706
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.

Loading map…

Watershed: —
Assessed size: 5.62 Miles

Facilities with an NAL exceedance for a listed pollutant (7)

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

A 1 Recycling8 36I022586

Chemical oxygen demand (COD) · most recent exceedance RY 2015 · association: derived watershed association

Alltech Inc8 36I026444

Chemical oxygen demand (COD) · most recent exceedance RY 2022 · association: derived watershed association

Attan Recycling Corp8 36I025350

Chemical oxygen demand (COD) · most recent exceedance RY 2017 · association: derived watershed association

Envision Plastics8 36I024981

Chemical oxygen demand (COD) · most recent exceedance RY 2025 · association: derived watershed association

Main Street Fibers8 36MR000021

Chemical oxygen demand (COD) · most recent exceedance RY 2020 · association: derived watershed association

Main Street Recycling8 36I000936

Chemical oxygen demand (COD) · most recent exceedance RY 2022 · association: derived watershed association

Wetmore tool & engineering8 36I027071

Chemical oxygen demand (COD) · most recent exceedance RY 2019 · 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

4 Axis Industries

Upland · No Exposure Certification

derived_watershed_association