California Stormwater Intelligence

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Waterbody profile

Official Water Board record · 2026 cycle

Temescal Creek, Reach 1a

Waterbody ID (WBID): CAR8012500020160915056358
County / counties: Riverside
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 (4)

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
CopperMetals	133738	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
IronMetals	133751	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
MalathionPesticides	154749	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Oil and GreaseNuisance	133757	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: CAR8012500020160915056358
CALWNUM: 4801.25
WBD code: 180702030606
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: 1.71 Miles

Facilities with an NAL exceedance for a listed pollutant (2)

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

MillworX Precision Machining Inc8 33I027347

Iron · most recent exceedance RY 2021 · association: derived nearby in watershed

Norco Truck & Auto Parts Towing Inc8 33I000029

Iron · most recent exceedance RY 2024 · 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

3V Fastners Co Inc

Corona · No Exposure Certification · 0.13 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

A One Apparel Printing

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

A&S CNC METAL WORKS

Corona · No Exposure Certification · 0.42 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Accurate Grinding & Mfg Corp

Corona · No Exposure Certification · 0.32 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.47 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Advanced Mounting and Design

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Advanced Paper Forming

Corona · No Exposure Certification · 0.16 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.46 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

AQUEOUS TECHNOLOGIES CORPORATION

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Arvinyl Laminates LP

Corona · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Aseptic Solution USA

Corona · Notice of Intent · 0.89 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

BIGMANN MOVING SERVICES

Corona · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Bimbo Bakeries USA Inc Corona Sales Center

Corona · Notice of Non-Applicability · 0.99 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

California Wire Products

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carpenter & Paterson

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Carven Exhaust INC

Corona · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

CMA Company LLC

Corona · No Exposure Certification · 0.91 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Com Tech Mechanical Solutions Inc

Corona · No Exposure Certification · 0.96 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Core Mark Int Inc

Corona · Notice of Intent · 0.33 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.97 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Cortek Test Solutions LLC

Corona · No Exposure Certification · 0.21 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Creative Machining Technology

Corona · No Exposure Certification · 0.36 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Crown Auto Salvage

Corona · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

David Engineering & Mfg Inc

Corona · No Exposure Certification · 0.75 km away

derived_receiving_water

Derived by California Stormwater Intelligence

DECRA Metal Roofing

Corona · No Exposure Certification · 0.98 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Diversified Aerospace Finishing

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

EJ Manufacturing

Corona · No Exposure Certification · 0.41 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

exterior cladding systems inc

Corona · No Exposure Certification · 0.18 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

First Student Inc 20414

Corona · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Fischer Mold Inc

Corona · Notice of Intent · 0.39 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Frutarom USA Inc

Corona · No Exposure Certification · 0.06 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Gilder Corporation

Corona · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

GLD Trucking INC

Norco · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Hand Air express

Corona · No Exposure Certification · 0.50 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Handbill Printers

Corona · No Exposure Certification · 0.57 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Hughes Aerospace

Corona · No Exposure Certification · 0.97 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Husk ITT Corporation

Norco · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

INFINITI MANUFACTURE LLC

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Jett Transportation

Corona · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Kobelco Compressors America Inc

Corona · Notice of Intent · 0.83 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Kurz Transfer Products LP

Corona · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.06 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Lucas Oil Products Inc

Corona · Notice of Intent · 0.80 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Marie Callenders Inc

Corona · No Exposure Certification · 0.39 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.94 km away

derived_receiving_water

Derived by California Stormwater Intelligence

MCCOY DOORS & MORE

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Merrick Engineering Inc

Corona · Notice of Intent · 0.81 km away

derived_receiving_water

Derived by California Stormwater Intelligence

MillworX Precision Machining Inc

Corona · Notice of Intent · 0.40 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Minka Lighting Inc

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

MV Transportation Div 581

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Norco Truck & Auto Parts Towing Inc

Norco · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Nord Gear Corporation

Corona · No Exposure Certification · 0.93 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

OmegaStar Trucking

Corona · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Oseda Industries Corporation

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Preferred Choice Printing

Corona · No Exposure Certification · 0.13 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.09 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Norco · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Quick Crete Products Corp

Norco · Notice of Intent · 0.67 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.18 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Republic Bag Inc

Corona · Notice of Intent · 0.28 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Sanchez Recycling Inc

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Corona · Notice of Non-Applicability · 0.09 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Signarama Corona

Corona · No Exposure Certification · 0.93 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Stark Venture United

Corona · No Exposure Certification · 0.98 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Corona · Notice of Intent · 0.05 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

T&T Enterprises Inc

Corona · No Exposure Certification · 0.95 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Talco Plastics Inc

Corona · Notice of Intent · 0.20 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Teklam Collins Aerospace

Corona · No Exposure Certification · 0.41 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Thoro Packaging

Corona · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

TNT Plastic Molding

Corona · Notice of Intent · 0.12 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Trimedyne Inc Corona

Corona · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Corona · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

United Metal Products

Corona · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.10 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.09 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Eastvale · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Water Reclamation Facility No 2

Corona · Notice of Intent · 0.03 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Norco · Notice of Intent · 0.48 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Westlake Royal Roofing LLC

Corona · Notice of Intent · 0.70 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Whosale Merchandiser

Corona · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.90 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Corona · No Exposure Certification · 0.48 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Facility records are official Industrial General Permit registrations, but the association between a facility and this waterbody is derived geographically (proximity or shared HUC12 subwatershed) and is not a Water Board receiving-water determination. Where a permit carries a Water Board-stated TMDL requirement naming this water, it is listed separately above.