The AirData Web site provides access to air pollution data for the entire United States. Users can discover the highest ozone levels in their state, where sources of air pollution are located, and much more. The Environmental Protection Agency offers annual summaries of air pollution data from two databases: Air Quality System (AQS) and the National Emission Inventory (NEI). Users can discover the chemicals whose emission levels are monitored as well as the chemicals that are created in the atmosphere. By selecting the desired factors, users can easily generate a map or report of air pollution data.