EMFAC2025 Technical Documentation#
EMission FACtor (EMFAC) is a model that estimates the official emissions inventories of on-road mobile sources in California. It is developed by the Mobile Source Analysis Branch in Air Quality, Science, and Planning Division at California Air Resources Board.
This web document provides EMFAC2025 Technical Documentation, a comprehensive resource that provides detailed information about the updates and changes made in EMFAC2025, including the model’s structure, methodologies, and data sources. It is intended for users seeking a comprehensive understanding of the model’s functionalities and the scientific basis behind its calculations.
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EMFAC2025 Technical Documentation is available in PDF format at the following links:
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The EMFAC Web Platform provides all the functionalities of the EMFAC2025 PC Application, utilizing pre-generated EMFAC2025 outputs for convenient access and use. Additionally, it offers access to outputs from previous versions of EMFAC, including EMFAC2021 and EMFAC2017.