Community Multiscale Air Quality (CMAQ)

The primary goals for the Models-3/Community Multiscale Air Quality (CMAQ) modeling system are to improve 1) the environmental management community's ability to evaluate the impact of air quality management practices for multiple pollutants at multiple scales and 2) the scientist’s ability to better probe, understand, and simulate chemical and physical interactions in the atmosphere. The newest Models-3/CMAQ version 4.6 now available for download from the CMAS Website Exit EPA Disclaimer.

Information about the changes to the new model and release notes are available from the "Release Notes" link on the right side of this page.

Tutorial and Training course Exit EPA Disclaimerinformation for Model-3/CMAQ and related products can also be found on the CMAS website.

Atmospheric Sciences Modeling
Exposure Research | Research & Development

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