California Stormwater Intelligence
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Waterbody profile

Official Water Board record · 2026 cycle

Unnamed Tributary to French Valley

Waterbody ID (WBID)
CAC9023300020190905045587
County / counties
Riverside
Regional Water Board
Regional Board 9 - San Diego Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (2)

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
NitrogenNutrients127349List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
PhosphorusNutrients114744List on 303(d) list (TMDL required list)Revised5A — 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, 10:57 PM UTC
Waterbody ID
CAC9023300020190905045587
CALWNUM
4902.33
WBD code
180703020401
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
3.91 Miles

Derived facility associations

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

Derived
Diamond Valley Lake Marina

Hemet · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

French Valley Airport

Murrieta · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

II VI Aerospace & Defense

Murrieta · Notice of Intent · 0.46 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Murrieta DC

Winchester · Notice of Intent · 0.24 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

REACH 027 - French Valley

Murrieta · Notice of Non-Applicability · 0.80 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Russ Wernimont Designs

Murrieta · No Exposure Certification · 0.57 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Temecula Hills Winery

Temecula · No Exposure Certification

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.