Agency details
- Jurisdiction
- state
- State or territory
- Montana — MT
- Agency type
- Environmental Regulator
- Verification status
- Verified
Back to Montana agencies
Montana Department of Environmental Quality Air Quality Bureau
state · Montana — MT · Environmental Regulator
Official contact information
- Website: Visit official website (opens in a new tab)
- Phone: 406-444-3490
- Email: deqair@mt.gov
- Address: Montana DEQ Air Quality Bureau, PO Box 200901, Helena, MT 59620-0901
Regulatory topics
- Environmental / Emissions
- Permitting
Official sources
- About Air (opens in a new tab)
guidance_page - confirmed Aug 13, 2026
- Air Permitting and Operator Assistance (opens in a new tab)
official_website - confirmed Aug 13, 2026
Source review
GCC provides directory information, not legal or regulatory advice.
Verified means GCC checked the agency identity and listed information against one or more official sources. It is not an endorsement.
Confirmation status
- Last confirmed
- Aug 13, 2026
- Reconfirmation status
- Current