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NPDES Permit for Charlo Wastewater Treatment Facility in Montana

Under National Pollutant Discharge Elimination System permit number MT-0022551, the Charlo Wastewater Treatment Facility is authorized to discharge from its publicly owned treatment works located on the Flathead Reservation in Lake County, Montana , to an unnamed tributary to Dublin Gulch.

MT0022551 Charlo Wastewater Treatment Facility NPDES Permit (pdf) (506.02 KB, December 30, 2025)
The NPDES discharge permit.
MT0022551 Charlo Wastewater Treatment Facility Statement of Basis (pdf) (972.77 KB, December 30, 2025)
The statement of basis for the NPDES discharge permit.