The Comprehensive Air quality Model with extensions (CAMx) is a publicly available open-source computer modeling system for the integrated assessment of gaseous and particulate air pollution. CAMx is designed to simulate air quality over many geographic scales, treat a wide variety of inert and chemically active pollutants (e.g. Ozone, inorganic and organic PM2.5/PM10, mercury and toxics), provide source-receptor, sensitivity, and process analyses, and be computationally efficient and easy to use.

The U.S. EPA has approved the use of CAMx for numerous ozone and PM State Implementation Plans throughout the U.S, and has used this model to evaluate regional mitigation strategies.

For additional information about CAMx you can visit the Environ CAMx web site:

Source: The Atmospheric Studies Group. 2011. The CALPUFF Modeling System. Accessed on 9 September 2013. Available at