United States
88 monitored cities
United States has 88 monitored cities. Fresno is the most polluted right now (AQI 153). 1 city is in the unhealthy range (AQI above 100).
Air quality snapshot
Median AQI
30
Good
72
Moderate
15
Unhealthy
1
Most Polluted Cities in United States
View All Most PollutedCleanest Cities in United States
View All CleanestUnderstanding Air Quality Index
Good
Air quality is satisfactory, and air pollution poses little or no risk.
Moderate
Air quality is acceptable. However, there may be a risk for some people.
Unhealthy for Sensitive Groups
Members of sensitive groups may experience health effects.
Unhealthy
Everyone may begin to experience health effects.
Very Unhealthy
Health alert: everyone may experience more serious health effects.
Hazardous
Health warnings of emergency conditions. The entire population is likely to be affected.
The Air Quality Index (AQI) is a scale from 0 to 500 that measures air pollution levels. Poor air quality can cause respiratory issues, cardiovascular problems, and other health concerns.
Source: US EPA Air Quality Index
Last updated: 22 Sep 09:11
