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Waterbody profile

Official Water Board record · 2026 cycle

Chorro Creek

Waterbody ID (WBID)
CAR3102201219980825120817
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 (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 Cause131911Do Not Delist from 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
ChlorideSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES80989List on 303(d) list (TMDL required list)Original5A TMDL still requiredLow
ChromiumMetals109096List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
NickelMetals109057List on 303(d) list (TMDL required list)Revised5A TMDL still requiredLow
NutrientsNutrients129382Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B Addressed by USEPA-approved TMDLChorro Creek Nutrients and Dissolved Oxygen
Sedimentation/SiltationSediment68427List on 303(d) list (being addressed by USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLMorro Bay Sediment
SodiumSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES81036List on 303(d) list (being addressed by USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLChorro Creek Nutrients and Dissolved Oxygen
Total Dissolved SolidsSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES81037List on 303(d) list (being addressed by USEPA approved TMDL)Original5B Addressed by USEPA-approved TMDLChorro Creek Nutrients and Dissolved Oxygen
ToxicityTotal Toxics109074Do 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, 10:56 PM UTC
Waterbody ID
CAR3102201219980825120817
CALWNUM
3310.220001, 3310.220002, 3310.220003, 3310.270000
WBD code
180600060502
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
14.86 Miles

Derived facility associations

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

Derived
CA Army National Guard Caev 17

San Luis Obispo · Notice of Intent · 0.05 km away

derived_nearby_in_watershed

Derived by California Stormwater Intelligence

CA Dept Corrections Mens Colony

San Luis Obispo · Notice of Intent · 0.31 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.