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

Air

Effective January 2025, the Montana Stationary Source Permit Application has been updated to inform agency expectations and provide additional clarity regarding: 1. Emitting unit naming conventions (Section 2.0) and 2. Best Available Control Technology or BACT (Section 4.11).

Program Overview

The pages in this section inform you about the Air Program at Montana DEQ.

 

Air Quality Contacts

Air Quality Bureau Main Phone 
(406) 444-3490

FAX (Helena)
(406) 444-1499


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