These links are refreshed every day with data for the major air quality index pollutants (ozone and PM) for each monitoring
site as a separate page. You may click to view or right-click to download a PDF.
Note that during the late fall and winter seasons, most ozone monitoring sites are inactive.
To query historical data older than six months, please visit EPA public database. The AQS Data Mart contains every measured value the EPA has collected via the national ambient air monitoring program.
To request access to query data collected within the last six months, please click the link below – include your name, email, contact number, name of your organization, and brief summary of purpose. If approved, access will allow querying data with your own selected criteria. The link is NOT for use in requesting specific data be generated for and sent to you (ex. “Please send me meteorological data for the Atlanta area for June”). Request Access to Query Historical Data
