California Stormwater Intelligence
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Waterbody profile

Official Water Board record · 2026 cycle

Arroyo Del Valle

Waterbody ID (WBID)
CAR2043002319990218135233
County / counties
Alameda, Santa Clara
Regional Water Board
Regional Board 2 - San Francisco Bay Region
Waterbody type
River & Stream
Condition category
Category 4a — TMDL completed
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
DiazinonPesticides70712List on 303(d) list (being addressed by USEPA approved TMDL)Original5B — Addressed by USEPA-approved TMDLSan Francisco Bay Urban Creeks Diazinon—

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
CAR2043002319990218135233
CALWNUM
2204.300106, 2204.300107, 2204.300201, 2204.300202, 2204.300203, 2204.300204, 2204.300205, 2204.300805, 2204.300900
WBD code
180500040402, 180500040403, 180500040404, 180500040405, 180500040406, 180500040503
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
35.4 Miles

Derived facility associations

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

Derived
Cuda Ridge Wines

Livermore · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Dante Robere Winery

Livermore · No Exposure Certification · 0.21 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Fenestra Winery

Livermore · Notice of Intent · 0.01 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Las Positas Vineyards

Livermore · No Exposure Certification · 0.78 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Oldcastle Infrastructure

Pleasanton · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Pleasanton Garbage Service Inc

Pleasanton · Notice of Intent · 0.67 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Rubino Estates Winery

Pleasanton · No Exposure Certification · 0.74 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

TAEC Inc

Pleasanton · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Thermo Fisher Scientific

Pleasanton · 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.