Show O3 8-hr NAA:
 Show PM10 AMA:
 Show CO AMA:
 Show O3 1-hr AMA:
 Show mandatory class 1 Federal areas:

This map returns an inventory of stationary sources of air pollution based on origin coordinates, radius, and pollutant. To learn more about using this product, and other features of this product, click the help [?] icon on the lower right corner of the map.

Enter Coordinates:      (Dec. Degrees, WGS84)
Y (Lat):   X (Long):   
Search Radius:   
Pollutant:   Min Threshold:

Search facilities for:
Search on any part of a facility's name
Match using: Facility Name AQS ID 

Searches take several seconds to complete.
Help - Sources of Air Pollution Query

Making a query

An air pollution query is made by defining the following:

  • Coordinates (of centroid)--by either clicking on the map or manually entering WGS84 in decimal degrees. Toggle the "map click" and "manual" coordinate method to switch between these entry modes.
  • Search radius--ranging from 5 km to 50 km.
  • Pollutant--criteria pollutants and VOCs.
  • Minimum threshold--ranging from greater than 0 to 100 TPY

Once submitted, the results are returned on a now populated map, an interactive grid view, and an optional raw CSV format. If no results are returned, increasing the search radius and/or reducing the minimum threshold of emissions may be helpful.

Widgets explained

Use the help widget (this) to learn more about interfacing with the queried sources of air pollution tool.

Use the search widget to find facilities by any portion of the facility name or by exact AQS ID ("###-####").

Use the basemap widget to select another basemap such as topographic or imagery.

Use the print widget to create a graphical version of the map output (try experimenting with zooming and panning to produce the desired layout). Once created, the resulting file can be downloaded and printed.

Coordinates and conversion

This map uses WGS84 coordinates in decimal degrees. Whether or not the specific coordinates of interest are available to you, it is good practice to zoom into the area of interest, and verify the coordinates being queried. Oftentimes individual stacks can be seen when zoomed into larger scale aerial imagery. Coordinates can be converted through several online tools including this one: