What We're Showing
This map ranks all 50 states by average particle pollution, based on EPA data from the America’s Health Rankings 2025 report.
Key Takeaways
- Wyoming has the cleanest air in the U.S., with average particle pollution of just 4 µg/m³.
- California ranks worst, at 11.7 µg/m³, partly due to frequent wildfires.
- Nearly half of Americans live in areas with unhealthy air pollution levels.
