← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Llagas Creek (above Chesbro Reservoir)

Waterbody ID (WBID)
CAR3052001419980826100148
County / counties
Santa Clara
Regional Water Board
Regional Board 3 - Central Coast 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
pHOther Cause107228Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Temperature, waterOther Cause126115Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow

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
CAR3052001419980826100148
CALWNUM
3305.200103, 3305.200104
WBD code
180600020302
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
9.44 Miles

Derived facility associations

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

Derived
Calstone Company

San Martin · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Martin Airport

San Martin · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Martin Transfer Station

San Martin · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

South Bay Water Trucks LLC

Morgan Hill · Notice of Non-Applicability

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.