AirData : Access to Air Pollution Data

	Reports and Maps	Queries	About	How To	Contacts

Purpose

The AirData Web site gives you access to air pollution data for the entire United States. Want to know the highest ozone level measured in your state last year? Ever wonder where air pollution monitoring sites are located? Are there sources of air pollution in your town?    You can find out here!    AirData produces reports and maps of air pollution data based on criteria that you specify.

Data

AirData presents annual summaries of air pollution data from two EPA databases:

• AQS (Air Quality System) database provides air monitoring data - ambient concentrations of criteria and hazardous air pollutants at monitoring sites, primarily in cities and towns.
• NEI (National Emission Inventory) database provides estimates of annual emissions of criteria and hazardous air pollutants from all types of sources. The NEI database in 2002 replaced two separate EPA databases for emissions of criteria air pollutants (National Emission Trends, or NET) and hazardous air pollutants (National Toxics Inventory, or NTI).

We extract data periodically from these databases for use in AirData. The database status page has details.

Features

Here are the types of information you can find at the AirData Web site:

		Reports and Maps display air pollution data in tabular and graphical formats. Each report or map has options for customizing its content, and each one can produce a data file that you may download to your computer. Reports and Maps are the primary focus of the AirData Web site
		The Monitor Data Queries section of the AirData Web site has more detailed descriptions of air monitors, and annual summary data for more pollutants and years than standard AirData reports and maps. Monitor Data Queries uses data extracted from the AQS database.
		About AirData describes the kinds of air pollution data included in AirData reports and maps, and the EPA databases from which we obtain the data.
		How To Select... explains how to choose selection criteria for AirData reports and maps.
		Contacts gives the names, addresses, and phone numbers of people in EPA and state environmental agencies to contact about air pollution data.

Limitations

The AirData Web site does have some limitations. It cannot tell you where the air is cleanest, and it does not include detailed hourly or daily measurements of air pollution. AirData has annual summary data only.

The capability to run Java applets and Flash™ movies in your browser is desirable, but not essential. These capabilities enable optional features of the AirData Web site.

Other considerations:
· Use of cookies - temporary cookies only, nothing saved on your computer
· Accessibility - maps are inherently visual, may be inaccessible to some