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Waterbody profile

Official Water Board record · 2026 cycle

Bridgeport Reservoir

Waterbody ID (WBID)
CAL6303005019980806102128
County / counties
Mono
Regional Water Board
Regional Board 6 - Lahontan Region
Waterbody type
Lake & Reservoir
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (4)

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
MercuryMetals170268Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredMedium
NitrogenNutrients69088List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PhosphorusNutrients70629List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Sedimentation/SiltationSediment68876List on 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
Sep 16, 2026, 10:57 PM UTC
Waterbody ID
CAL6303005019980806102128
CALWNUM
8630.100103, 8630.300100, 8630.300301, 8630.300302, 8630.300403, 8630.300500
WBD code
160503010109, 160503010110
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
2556.92 Acres

Derived facility associations

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

Derived
Bridgeport Landfill

Bridgeport · Notice of Intent · 0.20 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Bryant Field

Bridgeport · Notice of Non-Applicability · 0.34 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

US Marine Corps

Bridgeport · Notice of Intent · 0.59 km away

derived_nearby_in_watershed

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.