← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Pyramid Lake

Waterbody ID (WBID)
CAL4034200020091208113257
County / counties
Los Angeles
Regional Water Board
Regional Board 4 - Los Angeles Region
Waterbody type
Lake & Reservoir
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (7)

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
DDT (Dichlorodiphenyltrichloroethane)Pesticides149783Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
DieldrinPesticides138961Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
MercuryMetals149784Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PCBs (Polychlorinated biphenyls)Toxic Organics138972Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
pHOther Cause138971List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
SodiumSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES138974List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Temperature, waterOther Cause138976List 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, 10:56 PM UTC
Waterbody ID
CAL4034200020091208113257
CALWNUM
4403.42
WBD code
180701020507, 180701020508, 180701020509, 180701020602
Geometry
Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

Location

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

Loading map…
Watershed
Assessed size
1177.48 Acres

Derived facility associations

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

Derived

No industrial stormwater facility is geographically associated with this waterbody.

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.