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 pollution
Citizens Guide to Air Permits
Permits specify how facilities must operate, monitor and report emissions
Cross-State Air Pollution Rule (CSAPR)
Emission trading for sulfur dioxide and nitrogen dioxide
State Planning
State plans to protect Missouri's air quality
Air Monitoring
How we measure and analyze air pollution
Air Pollutants and Sources
Find weekly, monthly and quarterly air monitoring data available for six pollutants
Volkswagen Trust Funds
Vehicle/engine replacement program to reduce nitrogen dioxide emissions
Diesel Emissions Reduction Act (DERA)
Grants to reduce emissions from diesel fleets
Technical Assistance
Information and resources to help businesses and municipalities stay in compliance
Air Program Advisory Forum
Working together to improve Missouri's air quality
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