The department works in many ways to protect, improve and maintain Missouri’s air quality as directed by the Missouri Air Conservation Law and the federal Clean Air Act. We issue permits, inspect sources of air pollution, evaluate locations for air monitoring equipment and analyze data collected from these monitors. The department provides financial and compliance assistance and, when necessary, enforcement action to address violations of air regulations. We find ways to reduce emissions across the state and develop state plans to meet federal standards. Learn more about what the department is doing to reduce air pollution and protect the health of Missouri's citizens and its visitors. 

Citizens Guide to Air Rules and Regulations
Federal and state regulations written to address air quality
Citizens Guide to Air Permits
Permits specify how facilities must operate, monitor and report emissions
Air Financial Assistance Opportunities
Funding to help businesses finance projects to improve air quality
Cross-State Air Pollution Rule (CSAPR) Trading Program
Emission trading for sulfur dioxide and nitrogen oxides
Climate Pollution Reduction Grants (CPRG) Program
Developing climate action plans and implement projects to reduce greenhouse gas emissions
Diesel Emissions Reduction Act (DERA)
Projects to reduce diesel emissions from diesel fleets
Volkswagen Trust Funds
Projects to reduce emissions of nitrogen dioxide emissions from mobile sources
State Planning
State implementation plans to meet federal pollutant standards
Air Monitoring
Measure, analyze and track Missouri's air quality
Technical Assistance
Information and resources to help businesses and municipalities stay in compliance
Public Notices
Provide input on draft permits, plans or rules on public notice
Success Stories
What we're doing with businesses and communities to improve our air
Find a meeting, hearing or event near you
Document Search
Search all department documents in one location for easy access
Laws, Rules and Regulations
State and federal rules governing air; rules in development