Montana Department of Environmental Quality About Us Permitting & Operator Assistance Public Participation

Air Quality | United States Antimony Corporation – Thompson Falls Facility

  • December 05 2025

The Department of Environmental Quality has prepared a Department Decision for Montana Air Quality Permit #2973-05, for United States Antimony Corporation – Thompson Falls Facility.

Location:

  • Section 29, Township 21 North, Range 31 West
  • Sanders County

Associated Materials:

Facility Appeal Period Ends: 

  • December 22, 2025 11:59PM

Contact: John P. Proulx


Tags: MEPA, Air and Public Notice