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Waterbody profile

Official Water Board record · 2026 cycle

San Simeon Creek

Waterbody ID (WBID)
CAR3101301220020124141805
County / counties
San Luis Obispo
Regional Water Board
Regional Board 3 - Central Coast Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (5)

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
ChlorideSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES108915Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
NitrateNutrients126785Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
Oxygen, DissolvedNutrients108934Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
SodiumSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES108940Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ToxicityTotal Toxics108942List 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
Aug 21, 2026, 12:44 AM UTC
Waterbody ID
CAR3101301220020124141805
CALWNUM
3310.130101, 3310.130102, 3310.130103
WBD code
180600060404, 180600060407
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
5.7 Miles

Derived facility associations

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

Derived
Cambria Rock and Sand LLC

Cambria · Notice of Intent · 0.07 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

Lux Bus America Co

San Simeon · No Exposure Certification

derived_watershed_association

Derived by California Stormwater Intelligence

Wajona Inc Cambria Mine

Cambria · Notice of Intent · 0.01 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.