← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Upper San Leandro Reservoir

Waterbody ID (WBID)
CAL2042001120091208102529
County / counties
Alameda, Contra Costa
Regional Water Board
Regional Board 2 - San Francisco Bay 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
MercuryMetals151603Do 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
CAL2042001120091208102529
CALWNUM
2204.200101, 2204.200103
WBD code
180500040803
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
758.16 Acres

Derived facility associations

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

Derived
Acalanes Union High School Dist

Moraga · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Alameda Junk Collectors

San Leandro · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

B&G Express Delivery Inc

San Leandro · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Bigge Crane and Rigging Co

San Leandro · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

California Busses Express Inc

San Leandro · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

D R Trucking Inc

San Leandro · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

EBRPD Castro Valley Corp

Castro Valley · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Fulfill Manufacturing Inc

San Leandro · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Harsch Investmetn Properties

San Leandro · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Hidden Star Orchards

San Leandro · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

J & W SANCHEZ TRUCKING CO INC

San Leandro · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

LC Confidence Transit Inc

San Leandro · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

LC Confidence Transit Inc

San Leandro · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

M & V Hauling

San Leandro · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

McNeill Manufacturing

San Leandro · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Pitch It LLC

San Leandro · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Porifera Inc

San Lorenzo · 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.