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



Supplementary resources including documents, reports, frequently asked questions, and guidance. For additional information please visit the specific DEQ program page. To obtain records that are not available on the DEQ website please visit the Public Records Center.


You’ll also find information on public participation, contacts for Air Quality programs, and a link to check real-time air quality data.

The Board of Environmental Review has approved multiple county-level air quality programs. These programs give counties the authority to implement a wide variety of air quality related control programs, including facility permitting, open burning programs, and wood-stove
regulations. Each county program is different. Click on a county for contact and website information. If you have questions about county programs or are interested in having one of these programs in your county, call 406-444-3490.

Butte-Silver Bow County Environmental Health

Office Phone: 406-497-5020
Hot-Line: 406-7239218

Cascade City-County Environmental Health

Office Phone: 406-454-6950

Flathead County Environmental Health

Office Phone: 406-751-8130
Hot-Line: 406-751-8144

Lewis & Clark Public Health

Office Phone: 406-447-8351
Hot-line: 406- 447-1644

Lincoln County Environmental Health

Current air quality alerts:
Office Phone: 406-283-2442
Hot-line: 406 293-5644

Missoula County Environmental Health

Current air quality alerts:
Office Phone: 406 258-4755
Hot-line: 406 258-3600

RiverStone Health (Yellowstone County)

Office Phone: 406-256-2770

Advisory Councils

What is CAAAC?

The Clean Air Act Advisory Committee (CAAAC) is a stakeholder advisory group formed to enhance communication between the Montana Department of Environmental Quality (DEQ) and a diverse range of air quality stakeholders by developing working relationships centered on a two-way exchange of information. CAAAC advises DEQ on a wide range of air quality issues not limited to establishment and implementation of laws and rules; program funding; compliance assistance; and regional air quality issues, impacts, and challenges. Through regular meetings and email correspondence, DEQ presents information to and solicits feedback from members of CAAAC.

Upcoming Meetings 

Next Meeting: TBD


Recent Meetings

CAAAC Meeting 4/4/202
CAAAC Meeting 11/8/2023
CAAAC Meeting 10/27/2022
CAAAC Meeting 6/21/2022
CAAAC Meeting 2/22/2022




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