AirNow

Your one-stop shop for information on air quality is AirNow. A recently updated website prioritizes local air quality while also giving data on state, national, and global air quality. You may even zoom out to see the big picture on a new interactive map or drill down to examine statistics for a single air quality meter.

The official U.S. Air Quality Measure (AQI), a color-coded measure used to indicate whether the air is healthy or unhealthy for you, is used by AirNow to report air quality. Knowing the AQI in your location allows you to take precautions for your health. The official U.S. Air Quality Index is used by AIRNow, an official partner of the U.S. Environmental Protection Agency, NASA, NOAA, and other air quality agencies, to provide the user with air quality information.

State, municipal, or tribal monitoring organizations take measurements using federal reference or comparable monitoring techniques that have been approved by the EPA. AirNow's data are not fully validated before being submitted to and certified in the EPA's regulatory database, the Air Quality System (AQS), despite preliminary data quality evaluations being completed.

Website: https://www.airnow.gov/