Santa Clara River Reach 1 (Estuary to Hwy 101 Bridge)

Waterbody ID (WBID): CAR4031100019980917095027
County / counties: Ventura
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
Oxygen, DissolvedNutrients	85504	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
pHOther Cause	99143	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
ToxicityTotal Toxics	69370	Do Not Delist from 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low
TrashTrash	99197	List on 303(d) list (being addressed by action other than TMDL)	Original	5C — Addressed by action other than a TMDL	—	—

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: CAR4031100019980917095027
CALWNUM: 4403.100000, 4403.100000
WBD code: 180701020904, 180701020904
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: 3.56 Miles

Facilities with an NAL exceedance for a listed pollutant (6)

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

Allied Beverages4 56I028704

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

Pegasus Transportation4 56I024328

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

Reyes Coca Cola Bottling LLC4 56I027436

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

Saticoy Facility4 56I005204

pH · most recent exceedance RY 2015 · association: derived watershed association

Tri County Truck Co4 56I016719

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

Wiggins Lift Co4 56I017490

pH · most recent exceedance RY 2016 · 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

3D TEK CNC INC

Ventura · No Exposure Certification

derived_watershed_association