Montana Air - General: What you need to know

Governing Law and Regulations

State implementation plan (SIP): 40 CFR 51 and 40 CFR 52.1370 to 52.1394

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Attainment status: 40 CFR 81.327 and Administrative Rules of Montana (ARM) 17.8.201 to 17.8.230

Air permits: ARM 17.8.501 to 17.8.515, ARM 17.8.611 to 17.8.614, ARM 17.8.740 to 17.8.772, ARM 17.8.801 to 17.8.828, ARM 17.8.901 to 17.8.906, ARM 17.8.1001 to 17.8.1007, and ARM 17.8.1201 to 17.8.1234

Hazardous air pollutants (HAPs): ARM 17.8.302

New source performance standards (NSPS): ARM 17.8.302, ARM 17.8.802, ARM 17.8.902, and ARM 17.8.1002

Risk management program: 40 CFR 68

Regional haze: ARM 17.8.221 and ARM 17.8.1101 to 17.8.1111

Regulatory Agency

Montana Department of Environmental Quality (DEQ) Permitting and Compliance Division Air Resources Management Bureau

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Montana's air program is shaped by its SIP, which sets forth basic strategies for implementation, maintenance, and enforcement of the National Ambient Air Quality Standards (NAAQS). As mandated by the federal Clean Air Act (CAA), each state must adopt and submit a SIP to the U.S. Environmental Protection Agency (EPA) for approval.

Administration and enforcement. DEQ's Air Resources Management Bureau is responsible for administering and enforcing Montana's air pollution rules.

State Requirements



Montana's SIP was officially submitted to EPA in March 1972 and is frequently amended to comply with the 1990 CAA amendments. The SIP focuses on permitting, nonattainment areas, HAPs, NSPS, and numerous other air-related requirements.

Attainment Status

Areas of the state ...

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State Requirements

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Montana Air - General Resources

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