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The Air
Quality Index (AQI) ranks daily air quality from good to hazardous
for five major air pollutants, and provides practical information on their
effects on people's health.
Air Quality Where You Live 
The states of New Jersey and New York and the Commonwealth of Puerto Rico monitor air quality around the clock and provide the results on-line. Air quality data for the U.S. Virgin islands is not currently available on-line. For information about air quality in the U.S. Virgin Islands, please call the EPA Air Programs Branch at 212-637-4249.
Air Quality Across the Nation
The AIRNow Web site, developed by EPA with federal, state, tribal and local partners, provides easy access to national air quality information. It offers daily AQI forecasts, displays real-time conditions for over 300 cities, and provides links to more detailed state and local information.
