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NPDES Permit for Flathead Lake Biological Station Wastewater Treatment Facility in Montana

Under National Pollutant Discharge Elimination System permit number MT-0023388, the University of Montana is authorized to discharge from its Flathead Lake Biological Station wastewater treatment facility located on the Flathead Reservation in Lake County, Montana, to Flathead Lake.

Current Permit

MT0023388 Flathead Lake Biological Station WWTP Permit (pdf) (557.45 KB, August 18, 2026)
The NPDES discharge permit.
MT0023388 Flathead Lake Biological Station Statement of Basis (pdf) (1.4 MB, August 18, 2026)
The statement of basis for the NPDES discharge permit.