California Stormwater Intelligence
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Waterbody profile

Official Water Board record · 2026 cycle

Sespe Creek (Santa Clara River Reach 3 to Little Sespe Creek)

Waterbody ID (WBID)
CAR4033100020050918175233
County / counties
Ventura
Regional Water Board
Regional Board 4 - Los Angeles Region
Waterbody type
River & Stream
Condition category
Category 4b — Other control measures expected to attain standards
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 / stressorDecision IDFinal listing decisionDecision statusTMDL requirement statusTMDL projectTMDL priority
TrashTrash100295List on 303(d) list (being addressed by action other than TMDL)Original5C — 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
Sep 16, 2026, 10:57 PM UTC
Waterbody ID
CAR4033100020050918175233
CALWNUM
4403.31
WBD code
180701020706
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
2.75 Miles

Derived facility associations

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

Derived
Ameron Pole Prod

Fillmore · Notice of Intent · 0.28 km away

derived_receiving_water

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.