Software Open Access
US EPA Office of Research and Development
The Community Multiscale Air Quality (CMAQ) model is an active open-source development project of the U.S. EPA that consists of a suite of programs for conducting air quality model simulations. CMAQ combines current knowledge in atmospheric science and air quality modeling, multi-processor computing techniques, and an open-source framework to deliver fast, technically sound estimates of ozone, particulates, toxics and acid deposition.
For further information please visit the EPA website for the CMAQ system: www.epa.gov/cmaq
CMAQv5.3.2 System Updates
CMAQv5.3.2 includes significant updates to the CMAQ Integrated Source Apportionment Method (ISAM) and multiple minor fixes to address issues identified in CMAQv5.3.1. The new CMAQ-ISAM version includes substantial updates to the gas-phase chemistry apportionment algorithms that improves both physical and numerical aspects of the method. Users of ISAM are strongly encouraged to update to CMAQv5.3.2.
CMAQv5.3 System Updates
New Features and Processes in v5.3
|All versions||This version|
|Data volume||22.4 GB||1.9 GB|