← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

San Dieguito River

Waterbody ID (WBID)
CAR9051100020080825090830
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 (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
Benthic Community EffectsOther Cause126460Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
BifenthrinPesticides170612List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ChlorideSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES113312List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
NitrogenNutrients127371Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Oxygen, DissolvedNutrients113328List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PhosphorusNutrients113333Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PyrethroidsPesticides150003List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Total Dissolved SolidsSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES113338Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ToxicityTotal Toxics113339Do 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
Sep 16, 2026, 10:57 PM UTC
Waterbody ID
CAR9051100020080825090830
CALWNUM
4905.11
WBD code
180703040301, 180703040302
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
9.84 Miles

Derived facility associations

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

Derived
Amazon com Services LLC DSD9

San Diego · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Amazon com Services LLC SCA4

San Diego · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Amazon com Services LLC SCA4

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Baker Iron Works Inc

Solana Beach · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Bernardo Winery Incorporated

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

CubeSmart 151

San Diego · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Cymer LLC

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Del Mar Fairgrounds Racetrack

Del Mar · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

DRS Daylight Solutions

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Environmental Lights

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

General Atomics EMS

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Grifols Diagnostic Solutions Inc

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Grifols Diagnostic Solutions Incorporated

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Highland Valley Vineyards

Escondido · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

HP Inc

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Manzanita Roasting Company

Poway · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

North County Self Storage LLC

Escondido · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Northrop Grumman Aeronautics Systems

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Northrop Grumman Systems Corporation

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Price Industries

San Diego · Notice of Intent

derived_watershed_association

Derived by California Stormwater Intelligence

Rancho Bernardo Self Storage

San Diego · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

San Marcos Self Storage LLC

San Marcos · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

SMART Self Storage of Solana Beach

Solana Beach · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Veruca

Poway · Notice of Non-Applicability

derived_watershed_association

Derived by California Stormwater Intelligence

Zoetis LLC

San Diego · 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.