From the EPA:
New Database: AirCompare from the EPA
AirCompare, a new EPA-developed air quality tool, provides local air quality information to help people make informed decisions about moving, vacationing or living in different areas of the country.
“From people getting ready to retire to vacationers or those changing jobs, Americans are increasingly considering air quality as they make their plans,” said Bill Wehrum, EPA’s acting assistant administrator for Air and Radiation. “AirCompare helps answer those questions in a way that’s simple to understand.”
AirCompare uses EPA’s popular Air Quality Index (AQI) to explain air quality from a health perspective.
A person with asthma, for example, can use AirCompare to select up to 10 counties across the country — and with the click of a button, find out how many days the air was unhealthy for asthmatics last year. Or someone planning a trip can find out the best time of year to visit a particular area, based on concerns about asthma, heart disease, outdoor activity, or just general interest.