← Impaired waters

Waterbody profile

Official Water Board record · 2026 cycle

Main Drain (Kern County)

Waterbody ID (WBID)
CAR5587000020101114140120
County / counties
Kern
Regional Water Board
Regional Board 5 - Central Valley Region
Waterbody type
River & Stream
Condition category
Category 5 — 303(d) listed, TMDL required
Integrated Report cycle
2026

303(d) listings (4)

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
BoronMetals91726List on 303(d) list (TMDL required list)Original5A TMDL still requiredLow
DiuronPesticides93300List on 303(d) list (being addressed by action other than TMDL)Original5C Addressed by action other than a TMDL
Oxygen, DissolvedNutrients91783List on 303(d) list (TMDL required list)Original5A TMDL still requiredLow
ToxicityTotal Toxics95911List on 303(d) list (TMDL required list)Original5A 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, 10:57 PM UTC
Waterbody ID
CAR5587000020101114140120
CALWNUM
55870000
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
30.62 Miles

Derived facility associations

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

Derived
BWC Aggator Spray Yard

Buttonwillow · No Exposure Certification · 0.20 km away

derived_receiving_water

Derived by California Stormwater Intelligence

BWC Buttonwillow

Buttonwillow · No Exposure Certification · 0.58 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.