California Stormwater Intelligence

← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Santa Clara River Reach 6 (W Pier Hwy 99 to Bouquet Cyn Rd) (was named Santa Clara River Reach 8 on 2002 303(d) list)

Waterbody ID (WBID): CAR4035100019990204123459
County / counties: Los Angeles
Regional Water Board: Regional Board 4 - Los Angeles 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
Benthic Community EffectsOther Cause	151616	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
ChlorideSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES	137154	Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)	Revised	5B — Addressed by USEPA-approved TMDL	Santa Clara River Chloride (31)	—
ChlorpyrifosPesticides	137156	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
ToxicityTotal Toxics	137189	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: Sep 16, 2026, 10:56 PM UTC
Waterbody ID: CAR4035100019990204123459
CALWNUM: 4403.51
WBD code: 180701020107, 180701020202, 180701020401, 180701020403
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: 3.58 Miles

Derived facility associations

Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.

Derived

A&M Electronics

Valencia · No Exposure Certification · 0.82 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Advanced Bionics LLC

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Aero Engineering And Manufacturing

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Aerospace Dynamics International Inc

Valencia · Notice of Intent · 0.88 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Amazon com Services LLC CNO8

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Amazon com Services LLC HLA2

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Valencia · No Exposure Certification · 0.53 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

AVK Industrial Products

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Valencia · No Exposure Certification · 0.98 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Blue Barrel Disposal

Saugus · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Blue Cross Laboratories

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Bocchi Laboratories Inc

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Boston Scientic Neuromodulation

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

CERTIFIED THERMOPLASTICS CO LLC

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Chiquita Canyon Landfill

Castaic · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Chocolates a la Carte

Santa Clarita · No Exposure Certification · 0.13 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Classic Wire Cut Company Inc.

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Compression Source

Valencia · No Exposure Certification · 0.61 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Creative Graphic Services

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

CYPRESS MANUFACTURING LLC

Valencia · No Exposure Certification · 0.80 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Dangling Carrot Creative

Valencia · No Exposure Certification · 0.82 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Del Valle Field

Stevenson Ranch · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Eckert & Ziegler Isotope Products

Valencia · No Exposure Certification · 0.59 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Espana Fabricators

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Franmar Mfg Inc

Valencia · No Exposure Certification · 0.65 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Galaxy Bearing Co

Santa Clarita · No Exposure Certification · 0.62 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Hai Tech Lasers Inc

Santa Clarita · No Exposure Certification · 0.52 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Saugus · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

HOERBIGER Service Inc

Santa Clarita · No Exposure Certification · 0.47 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Holliday Rock Santa Clarita Plant 7

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

howard custom boats

Valencia · No Exposure Certification · 0.64 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Howard Custom Boats

Valencia · Notice of Intent · 0.63 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Hydra Electric Company

Burbank · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

IBG Holdings Inc

Valencia · No Exposure Certification · 0.73 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Indu Electric North America Inc

Santa Clarita · No Exposure Certification · 0.59 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

LANSAIR CORPORATON

Santa Clarita · No Exposure Certification · 0.22 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

LAS Precision Machine

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Lavi Industries

Valencia · No Exposure Certification · 0.76 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Lavi Industries

Valencia · No Exposure Certification · 0.64 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Leonards Molded Products

Santa Clarita · No Exposure Certification · 0.58 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Lockheed Martin Plant 2 Rye Canyon

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Lynette Lowe Dba Dans Precision Grinding

Valencia · No Exposure Certification · 0.95 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Magic Plastics Inc

Valencia · No Exposure Certification · 0.93 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Marathon Industries Inc.

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

MATO PLASTICS INC

Valencia · No Exposure Certification · 0.63 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Mikailian Meat Products

Valencia · No Exposure Certification · 0.81 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

MORGAN PRODUCTS INC

Valencia · No Exposure Certification · 0.93 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Valencia · No Exposure Certification · 0.49 km away

derived_receiving_water

Derived by California Stormwater Intelligence

MV Transportation Div 150

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

National Ready Mixed Concrete

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

National Technical Systems

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Ni Pro Plastics Inc

Valencia · No Exposure Certification · 0.52 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Valencia · Notice of Intent · 0.44 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Pacesetter Safety Inc

Santa Clarita · No Exposure Certification · 0.91 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Performance Machine Technologies Inc

Santa Clarita · No Exposure Certification · 0.96 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

PRC DESOTO INTERNATIONAL INC

Valencia · No Exposure Certification · 0.34 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Princeton Tool Inc dba Paragon Precision

Santa Clarita · No Exposure Certification · 0.75 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Professional Footcare International Inc

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

RAH Industries Incorperate

Valencia · No Exposure Certification · 0.52 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Romi Industries

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Saugus Industrial Ctr

Saugus · Notice of Intent · 0.93 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Saugus Union School District

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Saugus Water Reclamation Plant

Santa Clarita · Notice of Intent · 0.41 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Schrey Sons Mold Co Inc

Valencia · No Exposure Certification · 0.68 km away

derived_receiving_water

Derived by California Stormwater Intelligence

SGL Technic Inc

Valencia · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Shadow Wolf Energy LLC

Newhall · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

simplify optics

Santa Clarita · No Exposure Certification · 0.15 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Simplify Optics

Santa Clarita · No Exposure Certification · 0.15 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Simpson Labs LLC

Valencia · No Exposure Certification · 0.88 km away

derived_receiving_water

Derived by California Stormwater Intelligence

SoCal Diesel Inc

Valencia · No Exposure Certification · 0.21 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Canyon Country · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Soledad Rock Quarry

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Southern California Gas Company Honor Rancho

Valencia · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Specialty Polymers and Services Incorporated

Santa Clarita · No Exposure Certification · 0.71 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Valencia · No Exposure Certification · 0.56 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Stoll Metalcraft Inc

Santa Clarita · No Exposure Certification · 0.89 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Stratasys Direct Inc

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Sulphur Springs School Dist

Canyon Country · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Teague Custom Marine Inc

Valencia · Notice of Intent · 0.95 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Valencia · No Exposure Certification · 0.64 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

UltraViolet Devices Incorporated

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

UTAK Laboratories INC

Valencia · No Exposure Certification · 0.18 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Valencia Plastics

Santa Clarita · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Valencia Water Reclamation Plant

Valencia · Notice of Intent · 0.69 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Valley Syncom Circuits

Santa Clarita · No Exposure Certification · 0.61 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Western Filter A Division of Donaldson Company Inc

Valencia · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Whitmor Plastic Wire and Cable Corporation

Valencia · No Exposure Certification · 0.50 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

William S Hart Union High School District

Santa Clarita · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Woodward HRT Inc

Santa Clarita · Notice of Intent

derived_watershed_association

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.