Quality of Air Means Quality of Life

AIRNow Home

AirCompare Home
County Comparisons
State Summaries
Monthly Averages
Basic Information
Health Concerns Affect the Comparison
About the Data
Frequently Asked Questions
Contact Us
Privacy and Security Notice
AirCompare - County Comparisons

Want to know how the air quality in your county compares with other counties? Compare the air quality of up to 10 counties within one state or multiple 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).

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

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

Use the map below to select up to 10 counties to compare. To begin, click on a state from the map (or list) to see a map of that state's counties. To select a county, click on the map or choose from the list of available counties. To compare counties from another state, choose "Select a Different State" near the upper right corner of the map.

Need help with the map?

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

On the state maps, counties without monitoring data appear gray. Note that some of these counties could be part of a nonattainment area, even though they lack monitoring data. For a list of nonattainment counties by pollutant, visit EPA's Greenbook. The red lines on the state maps indicate major highways.

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.
Begin Site Footer


AIRNow Home