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Waterbody profile

Official Water Board record · 2026 cycle

Los Penasquitos Creek

Waterbody ID (WBID)
CAR9061000020011025112826
County / counties
San Diego
Regional Water Board
Regional Board 9 - San Diego Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (13)

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
Benthic Community EffectsOther Cause145050Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
BifenthrinPesticides111726Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
CyfluthrinPesticides111733List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Cyhalothrin, LambdaPesticides111735List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
CypermethrinPesticides144946List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Indicator BacteriaPathogens127888Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
NitrogenNutrients132042Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PermethrinPesticides130377List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PhosphateNutrients69190List on 303(d) list (TMDL required list)Original5A TMDL still requiredLow
PhosphorusNutrients111715List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PyrethroidsPesticides144945List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Total Dissolved SolidsSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES111720Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ToxicityTotal Toxics111721Do 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
CAR9061000020011025112826
CALWNUM
90610000
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
11.76 Miles

Derived facility associations

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

Derived
Ajinomoto Althea

San Diego · No Exposure Certification · 0.20 km away

derived_receiving_water

Derived by California Stormwater Intelligence

BD Biosciences

San Diego · No Exposure Certification · 0.78 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Becton Dickinson and Co

San Diego · No Exposure Certification · 0.76 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Brammer Bio LLC

San Diego · No Exposure Certification · 0.97 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Canseco, Adriana

Poway · Notice of Non-Applicability · 0.41 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Codex DNA

San Diego · No Exposure Certification · 0.39 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Integrated Microwave Corp

San Diego · No Exposure Certification · 0.22 km away

derived_receiving_water

Derived by California Stormwater Intelligence

New English Brewing Company Incorporated

San Diego · No Exposure Certification · 0.36 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Pall Filtration Separations

San Diego · No Exposure Certification · 0.21 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Precision Engine Controls

San Diego · Notice of Intent · 0.27 km away

derived_receiving_water

Derived by California Stormwater Intelligence

QuidelOrtho

San Diego · No Exposure Certification · 0.91 km away

derived_receiving_water

Derived by California Stormwater Intelligence

Sorrento Valley Self Storage LLC

San Diego · No Exposure Certification · 1.00 km away

derived_receiving_water

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.