Particulate Matter (PM) Pollution
Most PM particles form in the atmosphere as a result of chemical reactions between pollutants.
1/6/2023 - EPA announces proposed decision to revise primary annual air quality standard for fine particle pollution (PM2.5)
Setting and Reviewing the Standards
Air Quality Where You Live
- View current and forecasted air quality conditions across the U.S.
- Explore current locations of wildfires
- Review data from air quality monitors across the world