← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Boulder Creek

Waterbody ID (WBID)
CAR3041202019990223102514
County / counties
Santa Cruz
Regional Water Board
Regional Board 3 - Central Coast 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
Sedimentation/SiltationSediment100061Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Original5B — Addressed by USEPA-approved TMDLSan Lorenzo River Sediment—

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
CAR3041202019990223102514
CALWNUM
3304.120201, 3304.120203
WBD code
180600150201, 180600150202
Geometry
Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

Location

Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.

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Watershed
—
Assessed size
7.7 Miles

Derived facility associations

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

Derived
Big Basin Vineyards

Boulder Creek · No Exposure Certification · 0.95 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Clos de la Tech

La Honda · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Los Altos Rod and Gun Club

Los Gatos · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Lorenzo Vly School District

Ben Lomond · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Santa Cruz Cnty Ben Lomond Lan

Ben Lomond · 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.