CMAQ: The Community Multiscale Air Quality Modeling System

Expanded analysis capabilities with AMETv1.5
- The Atmospheric Model Evaluation Tool (AMET) is a suite of software for evaluation of meteorological and air quality models.
- Version 1.5 includes:
  
  New evaluation plots and plotting options
  
  New evaluation options for real or near-real-time modeling
  
  Streamlined batch and wrapper scripts for creating many plots at once
CMAQ SOA used to inform cardiorespiratory mortality analysis
- Learn more about a new study in Nature Communications
Explore global-to-local chemical transport modeling
- The Advanced Air Quality Modeling System (AAQMS) is used to simulate influences of global emissions and meteorology on regional and local air quality.
- Learn more about a new study in JGR Atmospheres
Latest Release: CMAQv5.3.3
- Learn about new features in our latest release
- CMAQ source code and User's Guide available on GitHub
- Watch the CMAQv5.3 webinar on Enhanced Capabilities to Analyze Emissions Scenarios

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.