For more than a decade, EPA and states have used EPA’s Community Multiscale Air Quality (CMAQ) Modeling System, a powerful computational tool for air quality management.

CMAQ brings together three kinds of models:

• Meteorological models to represent atmospheric and weather activities.
• Emission models to represent man-made and naturally-occurring contributions to the atmosphere.
• An air chemistry-transport model to predict the atmospheric fate of air pollutants under varying conditions.

Learn more about CMAQ by clicking on the link to our fact sheet below.

• CMAQ Fact Sheet (2 pp, 112 K, About PDF)