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Web page with Air Quality System (AQS) ambient observation files
Ambient concentrations of most requested pollutants from the national ambient air quality monitoring networks stored in the Air Quality System (AQS). -
AirNow Real Time Air Quality KML File
A KML file with the location of all real time air quality monitors and the current conditions (air quality index). -
Clean Air Status and Trends Network (CASTNET): Visibility
Nephelometer data (conforms to IMPROVE network standards) from October 1993 to June 2002. This table is no longer updated. -
Clean Air Status and Trends Network (CASTNET) Download Data Module
The CASTNET Download Data module allows users to select, view, and download CASTNET data (Raw, Aggregate, Modeled & Factual Data) based on user selections. CASTNET sites are... -
KMZ files of EPA Ambient Monitors
KMZ files with the location of all the EPA ambient monitors with the ability to download data from within the description box. -
Web page with links to air quality and emissions data
A web page that describes and links to EPA systems for accessing and downloading ambient (outdoor) air quality and emissions data -
AirData AQS REST API
A REST web service API allowing the retrieval of historical air quality data from EPA. -
AirNow Real Time Air Quality REST API
A REST web service API allowing the retrieval of real time air quality index data from AirNow. -
Clean Air Status and Trends Network (CASTNET): Ozone
8-hour daily maximum ozone concentrations as measured by the Clean Air Status and Trends Network (CASTNET) -
Air Quality System (AQS) ambient observations: 2007 ozone
Ambient ozone concentrations for 2007 from the national ambient air quality monitoring networks stored in the Air Quality System (AQS).