Air Quality

These are the air quality topics that we believe might be of most interest to you as a businessperson in Illinois. For even more information, visit our main air quality page, as well as our forms, permits, and fees page.

• Air Quality Fact Sheets
• Air Permits
• Air Forms
• Outdoor Air Data (Air Quality Index, daily ozone highs, PM2.5 averages)
• Ambient Air Monitoring Network Plan
• Alternative Fuels
• Asbestos
• Clean Air Interstate Rule (CAIR) NO _x Trading Program
• Climate Change
• Emissions Reduction Market System (ERMS)
• Mercury Reduction
• Mobile Sources
• Open Burning
• Air Quality Reports
• Vehicle Emissions Testing
• Air Quality (main page)
• Forms, permits, and fees