Indiana Air - General: What you need to know

Governing Law and Regulations

State implementation plan (SIP): 40 CFR 51 and 40 CFR 52.769 to 52.800

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Attainment status: 40 CFR 81.315 and 326 Indiana Administrative Code (IAC) 1-4-1

Air permits: 326 IAC 2-1.1-1 to 2-14-4

Hazardous air pollutants (HAPs): 40 CFR 61, 40 CFR 63, 326 IAC 14-1 to 14-10, and 326 IAC 20-1 to 20-95

New Source Performance Standards (NSPS): 40 CFR 60 and 326 IAC 12-1

Risk management program: 40 CFR 68 and 326 IAC 20-2-1

Pollutant transport:

Clean Air Interstate Rule (CAIR): 326 IAC 24-1 to 24-3

Cross-State Air Pollution Rule (CSAPR): 40 CFR 97.401 to 97.735

Regional haze: 326 IAC 26-1

Regulatory Agency

Indiana Department of Environmental Management (IDEM) Office of Air Quality

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. The Indiana Department of Environmental Management's (IDEM) Office of Air Quality is responsible for administering and enforcing Indiana's air pollution rules. Indiana's air program is shaped by its state implementation plan (SIP), which details 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. Indiana's air program is implemented and enforced by IDEM's Office of Air Quality.

State Requirements



Indiana's SIP was officially submitted to the EPA in January 1972 and is frequently amended to comply with the 1990 CAA amendments. The SIP focuses on permitting, nonattainment areas, hazardous air pollutants (HAPs), and numerous other air-related requirements.

Attainment Status

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More on this topic:

Governing Law and Regulations
Regulatory Agency
Comparison: State vs. Federal
State Requirements
Additional Guidance

State Requirements

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Indiana Air - General Resources

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