Community Multiscale Air Quality Model (CMAQ)

The Community Multiscale Air Quality Model (CMAQ) is a computer tool that simulates how air pollutants—like ozone, particle matter, and smog—form, move, and impact air quality over regions ranging from local communities to entire continents. It uses weather data, emission sources, and chemical reactions to predict air pollution levels, helping policymakers understand pollution sources and develop strategies to improve air quality and protect public health.