Guidelines & Tools CMAQ Share SHARE Facebook share Twitter LinkedIn Copy URL Email Download Download cmaq en Added on: 20 May, 2025 Breadcrumb Home Resource Library CMAQ CMAQ (see-mak): 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.