Know the Air You Breathe
Real-time air quality data for every US city and ZIP code.
Make informed decisions about your outdoor activities.
Why monitoring matters
Everything you need to stay safe
We aggregate data from thousands of official EPA monitoring stations to give you the most accurate local air quality reading possible.
Real-time Updates
Data is refreshed hourly directly from EPA AirNow API sources, ensuring you always have current information.
Hyper-local Accuracy
We track air quality down to the ZIP code level, because air quality can vary significantly even within the same city.
Historical Trends
See 30-day history for every location to understand long-term patterns and seasonal changes.
Major Cities
View all citiesNew York City
New York
Los Angeles
California
Chicago
Illinois
Brooklyn
New York
Houston
Texas
Queens
New York
Philadelphia
Pennsylvania
Phoenix
Arizona
Manhattan
New York
San Antonio
Texas
San Diego
California
The Bronx
New York
Understanding the Air Quality Index
Good
Air quality is satisfactory, and air pollution poses little or no risk.
100
Moderate
Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
150
Unhealthy for
Sensitive Groups
Members of sensitive groups may experience health effects. The general public is less likely to be affected.
200
Unhealthy
Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.
300
Very Unhealthy
Health alert: The risk of health effects is increased for everyone.
Hazardous
Health warning of emergency conditions: everyone is more likely to be affected.