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United States Environmental Protection Agency
Technology Transfer Network
Support Center for Regulatory Air Models
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Support Center for Regulatory Air Models

       *******What'sNew*******

10/18/04 - A new model entitled HYROAD is now available.  Click HERE for more information.
10/14/04 - A proposal is being made to  remove certain models from the website.  Click HERE for more information.

9/9/04 - Updated versions of CAL3QHC and CAL3QHCR are now available.  Click HERE for more information.

 

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About This Website
This website is maintained by the Environmental Protection Agency.  It is a source of information on atmospheric dispersion (air quality) models that support regulatory programs required by the Clean Air Act.  Documentation and guidance for these computerized models are a major feature of this website.  The computer code, data and technical documents offered herein deal with mathematical modeling for the dispersion of air pollutants.

 
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