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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

03/08/2023 - Save the dates of June 28-29 for the 2023 Regional, State, and Local Dispersion Modelers' Workshop. It will be a hybrid event (in-person at EPA Region 7 and virtual) for our co-regulatory partners.

12/15/2022 - 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 (Beacon Wind project) has been added to the MCHISRS database.

12/13/2022 - 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 (Mayflower Wind project) has been added to the MCHISRS database.

11/23/2022 - A Model Clearinghouse Concurrence Memorandum to Region 3 regarding the use of AERCOARE-AERMOD as an alternative model for an Outer Continental Shelf permitting effort (CVOW-C project) has been added to the MCHISRS database.

10/14/2022 - A Model Clearinghouse Concurrence Memorandum to Region 2 regarding the use of two case-specific alternative model approaches for a modeled attainment demonstration of the 2010 SO2 NAAQS for the Alcoa Massena aluminum smelter has been added to the MCHISRS database.

08/03/2022 - An updated version of SMAT-CE (v2.0) is now available.

07/29/2022 - The final Guidance for Ozone and Fine Particulate Matter Permit Modeling is now available. A release webinar was held on Thursday, August 11.

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).

See Historical Announcements

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Last updated on March 8, 2023