A multi-scale photochemical modeling system for gas and particulate air pollution

Version 7.40 posted July 30, 2026

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Comprehensive Air Quality Model with Extensions

Why CAMx

Simulate air quality over many geographic scales
Treat a variety of inert and chemically active pollutants - photochemical gases, particulates, mercury and toxics
Conduct source attribution, sensitivity, and process analyses
Apply distributed- and shared-memory parallelization

CAMx Publications

Overview presentation of features and formulation

Visit our on-line library of papers and reports.

- - - - (2024) CAMx Formulation and Evaluation over the US
      - (2024) Improved modeling of OA from organic emissions