Indicates new for 2013-2014.
The United States EPA, NOAA, NPS, tribal, state, and local agencies developed the AIRNow website to provide the public with easy access to national air quality information. Easy-to-understand information on air quality terms such as "air quality index" and "particulate matter" are part of the general information section of the site. The website offers daily AQI forecasts as well as real-time AQI conditions for over 300 cities across the U.S., and provides links to more detailed state and local air quality websites.
Free; available online only