Waterbody profile
Official Water Board record · 2026 cycleEach row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.
| Pollutant / stressor | Decision ID | Final listing decision | Decision status | TMDL requirement status | TMDL project | TMDL priority |
|---|---|---|---|---|---|---|
| ChlordanePesticides | 106321 | List on 303(d) list (being addressed by USEPA approved TMDL) | Revised | 5B — Addressed by USEPA-approved TMDL | Santa Maria River Watershed Toxicity and Pesticides TMDL | — |
| Chlorophyll-aNutrients | 106322 | List on 303(d) list (TMDL required list) | Original | 5A — TMDL still required | — | Low |
| DDT (Dichlorodiphenyltrichloroethane)Pesticides | 154730 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | 5B — Addressed by USEPA-approved TMDL | Santa Maria River Watershed Toxicity and Pesticides TMDL | — |
| DieldrinPesticides | 106326 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | 5B — Addressed by USEPA-approved TMDL | Santa Maria River Watershed Toxicity and Pesticides TMDL | — |
| EndrinPesticides | 106330 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | 5B — Addressed by USEPA-approved TMDL | Santa Maria River Watershed Toxicity and Pesticides TMDL | — |
| Escherichia coli (E. coli)Pathogens | 125812 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | 5B — Addressed by USEPA-approved TMDL | Santa Maria River Watershed Fecal Indicator Bacteria TMDL | — |
| Heptachlor epoxidePesticides | 106333 | List on 303(d) list (TMDL required list) | Revised | 5A — TMDL still required | — | Low |
| MercuryMetals | 131074 | Do Not Delist from 303(d) list (TMDL required list) | Revised | 5A — TMDL still required | — | Low |
| NitrateNutrients | 127248 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | 5B — Addressed by USEPA-approved TMDL | Santa Maria River Watershed Nitrogen Compounds and Orthophosphate TMDL | — |
| Oxygen, DissolvedNutrients | 106341 | Do Not Delist from 303(d) list (TMDL required list) | Revised | 5A — TMDL still required | — | Low |
| PCBs (Polychlorinated biphenyls)Toxic Organics | 106343 | List on 303(d) list (TMDL required list) | Revised | 5A — TMDL still required | — | Low |
| ToxicityTotal Toxics | 106347 | Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL) | Revised | 5B — Addressed by USEPA-approved TMDL | Santa Maria River Watershed Toxicity and Pesticides TMDL | — |
Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.
Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.
Arroyo Grande · Notice of Intent
Derived by California Stormwater Intelligence
Arroyo Grande · Notice of Intent
Derived by California Stormwater Intelligence
Arroyo Grande · Notice of Non-Applicability
Derived by California Stormwater Intelligence
San Luis Obispo · Notice of Intent
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.