Historical Data

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 request access to query historical data with your own search criteria, please submit the request form below:  Once approved, access will allow you to query data with your own selected criteria. This is NOT an avenue to request specific data be generated and sent to you (ex. "Please send me meteorological data for the Atlanta area for June.") Please email your name, email, contact number, name of your organization, and a brief summary of the purpose of your request to Request Access to Query Historical Data.