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

Air Quality | Calumet Montana Refining

  • June 16 2025

The Department of Environmental Quality has prepared an Administrative Amendment for Montana Air Quality Permit #2161-40, for Calumet Montana Refining.

Location:

  • NE¼ of Section 1, Township 20 North, Range 3 East
  • Cascade County

Associated Materials:

Facility Appeal Period Ends: 

  • July 1, 2025 11:59PM

Contact: Craig Henrikson

Tags: Air and Public Notice