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IDEM > Monitoring > Air Monitoring > Attainment and Redesignations > National Ambient Air Quality Standards for Fine Particulate Matter PM2.5 National Ambient Air Quality Standards for Fine Particulate Matter PM2.5

Fine particles (PM2.5) are one of six criteria pollutants addressed by the Clean Air Act and regulated by the United States Environmental Protection Agency (U.S. EPA). These pollutants have been identified as being particularly harmful to humans and the environment.

Fine Particulate Matter (PM 2.5)

Fact Sheets

Educational Materials

Indiana PM 2.5 Designations

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