The Best and Worst U.S. States for Air Quality 🌬️

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.