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Support Center for Regulatory Atmospheric Modeling (SCRAM)

  • The Guideline on Air Quality Models provides the requirements and recommendations for regulatory air quality modeling

  • Photochemical and Dispersion models are critical components of regulatory compliance demonstrations

  • Air quality modeling projects the impacts of air emissions to ensure regulatory compliance

  • Air quality modeling supports regulatory programs required by the Clean Air Act

This website provides access to air quality models and other mathematical simulation techniques used in assessing control strategies and source impacts. 

Training and Resources

Announcements

06/27/2022 - An updated version of AERMOD Modeling System (dated 22112) is now available, including new versions of AERMOD, AERMET, and MMIF (v4.0).  A series of release presentations will be given during the first day of the upcoming EPA Regional, State, and Local (RSL) Dispersion Modelers' Workshop.

05/06/2022 - Save the Dates - 2022 EPA Regional, State, and Local (RSL) Dispersion Modelers' Workshop - July 12-14, 2022.

01/28/2022 - A Model Clearinghouse Concurrence Memorandum to Region 1 regarding the use of AERCOARE-AERMOD as an alternative model for an Outer Continental Shelf permitting effort (Park City Wind project) has been added to the MCHISRS database.

10/26/2021 - The AERMOD System Bugs, Errata, and Related Guidance and the AERMOD Modeling System Data Resources documents are now available.

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Last updated on June 27, 2022