Learn about CMAQ

Learn about CMAQ's purpose, history and design, as well as the scientists involved in developing and evaluating the model. You can also view a sample of CMAQ applications. 

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CMAQ's Purpose

Read about CMAQ's purpose, history, and capabilities including specialized models for meteorology-chemistry coupling and pollutant source attribution.

CMAQ 25th Anniversary

Celebrate 25 years of CMAQ history by reading highlights of how its integrity and complexity contribute to air quality management decision-making.

Overview of Science Processes

Discover how CMAQ brings together meteorological, emissions and air chemistry-transport phenomena to provide a holistic picture of Earth's atmosphere and its complex nature.

CMAQ Applications

Learn about the different ways the CMAQ model is applied to help communities, states and countries improve human health and the environment on global to local scales.