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Waterbody profile

Official Water Board record · 2026 cycle

Pinto Lake

Waterbody ID (WBID)
CAL3051003020020124122807
County / counties
Santa Cruz
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 (9)

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
AmmoniaNutrients145048Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLPinto Lake total phosphorus TMDL to address cyanobacteria blooms
Chlorophyll-aNutrients145046Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLPinto Lake total phosphorus TMDL to address cyanobacteria blooms
DDT (Dichlorodiphenyltrichloroethane)Pesticides84312List on 303(d) list (TMDL required list)Original5A TMDL still requiredLow
DieldrinPesticides106220List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
MercuryMetals131339List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
MicrocystinsOther Cause145044Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLPinto Lake total phosphorus TMDL to address cyanobacteria blooms
Oxygen, DissolvedNutrients145045Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLPinto Lake total phosphorus TMDL to address cyanobacteria blooms
pHOther Cause106230Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Scum/Foam-unnaturalNuisance145047Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLPinto Lake total phosphorus TMDL to address cyanobacteria blooms

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
CAL3051003020020124122807
CALWNUM
3305.100301
WBD code
180600020803
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
104.51 Acres

Facilities with an NAL exceedance for a listed pollutant (1)

Geographically associated industrial stormwater facilities whose reported results exceeded an Industrial General Permit Numeric Action Level for a pollutant this waterbody is listed for.

Derived

PVUSD Transportation Yard3 44I026418

pH · most recent exceedance RY 2023 · association: derived watershed association

This is derived co-occurrence between a calculated NAL comparison and the official 303(d) listing for this waterbody. An NAL exceedance triggers Exceedance Response Actions under the permit; it is not a violation and does not establish that any facility caused or contributed to this impairment.

Derived facility associations

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

Derived
PVUSD Transportation Yard

Watsonville · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

San Benito Supply

Watsonville · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Sunland Garden Product Inc

Watsonville · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

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.