← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

San Juan Creek

Waterbody ID (WBID)
CAR9012000020011025103828
County / counties
Orange, Riverside
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 (10)

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 Cause126462Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
BifenthrinPesticides111196List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
DDE (Dichlorodiphenyldichloroethylene)Pesticides127282Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Indicator BacteriaPathogens145389Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLBacteria Impaired Waters I (creeks and beach shorelines)
NitrogenNutrients127492Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Oxygen, DissolvedNutrients111182Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PhosphorusNutrients111185Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
PyrethroidsPesticides111194List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
SeleniumMetals111188Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ToxicityTotal Toxics111191Do 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
CAR9012000020011025103828
CALWNUM
4901.240000, 4901.250000, 4901.260000, 4901.270000, 4901.280000
WBD code
180703010101, 180703010102, 180703010104, 180703010302
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
23.13 Miles

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

Blenheim Facility Management9 30I027520

Phosphorus · most recent exceedance RY 2023 · association: derived nearby in watershed

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
Blenheim Facility Management

San Juan Capistrano · Notice of Intent · 0.17 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

CRR Inc San Juan Cap

San Juan Capistrano · Notice of Intent · 0.17 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

CT Organics

San Juan Capistrano · No Exposure Certification · 0.36 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Ewles Materials San Juan Cap

San Juan Capistrano · Notice of Intent · 0.24 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

FaceFirst

San Juan Capistrano · No Exposure Certification · 0.08 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Lapeyre Industrial Sands Inc

San Juan Capistrano · Notice of Intent · 0.28 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

MM Prima Deshecha Energy LLC

San Juan Capistrano · Notice of Intent · 0.42 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Olsen Pavingstone Inc

San Juan Capistrano · Notice of Intent · 0.26 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Pickering Properties LLC

Dana Point · Notice of Intent · 0.28 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Prime Fabrication

San Juan Capistrano · Notice of Intent · 0.32 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Santa Margarita Water Dist Chi

San Juan Capistrano · Notice of Intent · 0.23 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Shady Maples

San Juan Capistrano · Notice of Intent · 0.15 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Top Dead Center Brewery LLC

San Juan Capistrano · No Exposure Certification · 0.14 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.