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Waterbody profile

Official Water Board record · 2026 cycle

Alamo River

Waterbody ID (WBID)
CAR7231000019990205093023
County / counties
Imperial
Regional Water Board
Regional Board 7 - Colorado River Basin Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (26)

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
AmmoniaNutrients170639Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
BifenthrinPesticides170740List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
ChlordanePesticides155768Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLImperial Valley Organochlorine Compounds and Organophosphate Pesticides TMDL—
ChlorideSALINITY/TOTAL DISSOLVED SOLIDS/CHLORIDES/SULFATES171877Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—High
ChlorpyrifosPesticides155772Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLImperial Valley Organochlorine Compounds and Organophosphate Pesticides TMDL—
CyfluthrinPesticides170741List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
Cyhalothrin, LambdaPesticides170742Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—High
CypermethrinPesticides169353Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—High
DDE (Dichlorodiphenyldichloroethylene)Pesticides170547Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLImperial Valley Organochlorine Compounds and Organophosphate Pesticides TMDL—
DDT (Dichlorodiphenyltrichloroethane)Pesticides170548Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLImperial Valley Organochlorine Compounds and Organophosphate Pesticides TMDL—
DiazinonPesticides155781Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLImperial Valley Organochlorine Compounds and Organophosphate Pesticides TMDL—
DieldrinPesticides155789Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLImperial Valley Organochlorine Compounds and Organophosphate Pesticides TMDL—
DimethoatePesticides155850List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
EnterococcusPathogens77366Do Not Delist from 303(d) list (TMDL required list)Original5A — TMDL still required—High
Escherichia coli (E. coli)Pathogens71481Do Not Delist from 303(d) list (TMDL required list)Original5A — TMDL still required—High
Esfenvalerate/FenvaleratePesticides170744List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
ImidaclopridPesticides171885List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
MalathionPesticides155808Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLImperial Valley Organochlorine Compounds and Organophosphate Pesticides TMDL—
PCBs (Polychlorinated biphenyls)Toxic Organics155828Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLImperial Valley Organochlorine Compounds and Organophosphate Pesticides TMDL—
PermethrinPesticides169355List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
PyrethroidsPesticides169352Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—High
Sedimentation/SiltationSediment68028Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Original5B — Addressed by USEPA-approved TMDLAlamo River Sediment TMDL—
SeleniumMetals159206Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—Low
ToxaphenePesticides155839Do Not Delist from 303(d) list (being addressed with USEPA approved TMDL)Revised5B — Addressed by USEPA-approved TMDLImperial Valley Organochlorine Compounds and Organophosphate Pesticides TMDL—
ToxicityTotal Toxics159207Do Not Delist from 303(d) list (TMDL required list)Revised5A — TMDL still required—High
TrifluralinPesticides171882List on 303(d) list (TMDL required list)Revised5A — TMDL still required—Low

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, 10:57 PM UTC
Waterbody ID
CAR7231000019990205093023
CALWNUM
10723.100000, 10728.000000
WBD code
181002040702, 181002040703, 181002040704, 181002040705, 181002040707
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
58.96 Miles

Derived facility associations

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

Derived
The Original Bradford Soap Works Inc

Calexico · No Exposure Certification · 0.90 km away

derived_receiving_water

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.