← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Chesbro Reservoir

Waterbody ID (WBID)
CAL3052001420020124162255
County / counties
Santa Clara
Regional Water Board
Regional Board 3 - Central Coast Region
Waterbody type
Lake & Reservoir
Condition category
Category 5 — 303(d) listed, TMDL required
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
MercuryMetals131322Do 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
CAL3052001420020124162255
CALWNUM
3305.200104, 3305.300200
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
235.15 Acres

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.