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 |
|---|---|---|---|---|---|---|
| AmmoniaNutrients | 126543 | 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 | — |
| BifenthrinPesticides | 109548 | 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 | — |
| ChlorpyrifosPesticides | 109527 | 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 | — |
| DDE (Dichlorodiphenyldichloroethylene)Pesticides | 130093 | 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 | — |
| DiazinonPesticides | 109529 | 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 | — |
| NitrateNutrients | 121615 | 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 | — |
| PermethrinPesticides | 109564 | 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 | — |
| pHOther Cause | 109539 | Do Not Delist from 303(d) list (TMDL required list) | Revised | 5A — TMDL still required | — | Low |
| Temperature, waterOther Cause | 126168 | Do Not Delist from 303(d) list (TMDL required list) | Revised | 5A — TMDL still required | — | Low |
| ToxicityTotal Toxics | 109543 | 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 | — |
| TurbiditySediment | 109544 | Do Not Delist from 303(d) list (TMDL required list) | Revised | 5A — TMDL still required | — | Low |
Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.
Geographically associated industrial stormwater facilities whose reported results exceeded an Industrial General Permit Numeric Action Level for a pollutant this waterbody is listed for.
Simplot Grower Solutions Guadalupe3 42I026775
pH · most recent exceedance RY 2018 · association: derived watershed association
Taylor Farms Retail Inc3 42I030002
pH · most recent exceedance RY 2022 · association: derived watershed association
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.
Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.
Nipomo · No Exposure Certification · 0.43 km away
Derived by California Stormwater Intelligence
Guadalupe · Notice of Intent
Derived by California Stormwater Intelligence
Nipomo · Notice of Intent · 0.16 km away
Derived by California Stormwater Intelligence
Santa Maria · Notice of Intent
Derived by California Stormwater Intelligence
Nipomo · Notice of Intent · 0.34 km away
Derived by California Stormwater Intelligence
Nipomo · Notice of Intent · 0.35 km away
Derived by California Stormwater Intelligence
Nipomo · Notice of Intent · 0.24 km away
Derived by California Stormwater Intelligence
Guadalupe · Notice of Intent
Derived by California Stormwater Intelligence
Santa Maria · No Exposure Certification
Derived by California Stormwater Intelligence
Guadalupe · Notice of Intent
Derived by California Stormwater Intelligence
Nipomo · Notice of Intent · 0.47 km away
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.