Worst Air Quality Cities in the United States Today
Cities ranked by current air pollution conditions.
Cities With the Most Polluted Air Today
This ranking compares real-time Air Quality Index (AQI) readings to identify where air pollution levels are currently elevated across the United States.
Pollution levels may fluctuate throughout the day as atmospheric conditions and local emission sources shift.
[*] Note: Weather information applies only to cities currently available in our database.
We are continuously expanding and updating our coverage, but we do not yet provide weather data for all cities in the United States.