Links To Historical Data

  • EPA's Air Quality System (AQS) Data Mart opens new window - The intended users of the AQS Data Mart are air quality data analysts in the regulatory, academic, and health research communities. It is useful for those who need to download large volumes of detailed technical data stored at EPA and does not provide any interactive analytical tools.
  • EPA's Air Data Website opens new window - The AirData website gives you access to air quality data collected at outdoor monitors across the United States, Puerto Rico, and the U. S. Virgin Islands. The data comes primarily from the AQS (Air Quality System) database. You can choose from several ways of looking at the data: download data into a file, output the data into one of AirData's standard reports, create graphical displays using one of the visualizations tools, and investigate monitor locations using an interactive map.