Compare by state | Air Compare | AIRNow

AirCompare - State Summaries

Want to see how air quality compares among counties within a state? See the number of unhealthy air quality days among the counties of one state or up to three states.

Step 1: Select a health concern

You can generate reports based on specific health concerns or activity level. The default report provides information for the general population (with no specific health concern).

Asthma or other lung disease
Heart disease
Older adults and children (with no specific health concern)
Active Outdoors (with no specific health concern)
General Population (with no specific health concern)

Not sure which health concern to choose? Understand how health concerns affect the comparison.

Step 2: Select a state(s) from the map below

Use the map or list below to select a state of interest, or select up to 3 states to compare.

Need help with the map?

To use the state selection map, your browser must be able to display a Flash movie.


AIRNow is a government-backed program. Through AIRNow, EPA, NOAA, NPS, news media, tribal, state, and local agencies work together to report conditions for ozone and particle pollution. State, Local and Tribal Partners.



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