Support Center for Regulatory Atmospheric Modeling (SCRAM)

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Support Center for Regulatory Atmospheric Modeling (SCRAM)

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

Air Quality Models

Modeling Applications and Tools

Modeling Guidance and Support

Meteorological Data and Processors

Training and Resources

Announcements

05/22/2020 - An AERSURFACE (version 20060) stakeholder webinar is scheduled for June 15^th at 1pm EDT.

04/07/2020 - AERSURFACE (version 20060) is now available and replaces all previous versions, 13016 and 19039_DRFT.

03/16/2020 - The 2020 EPA Regional, State, and Local Modelers' Workshop scheduled for May 5-7, 2019 has been CANCELLED.

03/16/2020 - The DRAFT Guidance for Ozone and Fine Particulate Matter Permit Modeling is available for review and comment. The comment period is now extended to Friday, April 17, 2020.

03/12/2020 - The DRAFT Guidance for Ozone and Fine Particulate Matter Permit Modeling webinar presentation from March 12, 2020 is now avaialable.

01/13/2020 - The Draft Guidance on CAA 179B Demonstrations is now available for review.

12/06/2019 - A Model Clearinghouse Concurrence Memorandum to Region 6 regarding the use of AERCOARE-AERMOD as an alternative model in the Gulf of Mexico (SPOT DWP) has been added to the MCHISRS database.

11/13/2019 - The MERPs VIEW Qlik applications are now available.

11/08/2019 - SMAT-CE Version 1.6 is now available and is being released as a replacement for the MATS tool.

10/31/2019 - The Evaluating Reduced-Form Tools for Estimating Air Quality Benefits final report is now available.

10/25/2019 - The presentations, transcripts, and audio recordings from the Twelfth Conference on Air Quality Modeling are now available.

09/17/2019 - An informational webinar to review the 19191 AERMOD/AERMET release will be conducted on Wednesday, Sept 25, 2019 from 3:00-4:00p EDT.

08/28/2019 - The AERMOD Implementation Guide has been updated to include a new section that provides information on known model implementation issues, including two issues pertaining to the BUOYLINE source and processing site-specific data in AERMET.

08/21/2019 - An updated version of AERMOD Modeling System (dated 19191) is now available. Specifically, the AERMET and AERMOD executables, source code, documentation, and test cases have been revised.

08/21/2019 - A draft BPIPPRM (version 19191_DRFT) is now available for review and comment. This draft version is being released simultaneously with AERMOD version 19191 to facilitate testing and evaluation of the APHA options in AERMOD related to building downwash.

06/13/2019 - The final MERPs Guidance webinar presentation from June 13th is now available.

06/11/2010 - MMIF has been updated to version 3.4.1 to support a new choice for cloud cover data, as well as to correct a bug for CALPUFF and SCICHEM modes when a user is providing MM5 output.

5/30/2019 - The final version of the Fine Particulate Matter (PM_2.5) Precursor Demonstration Guidance is now available.

04/30/2019 - The final Guidance on the Development of Modeled Emission Rates for Precursors (MERPs) as a Tier 1 Demonstration Tool for Ozone and PM_2.5 under the PSD Permitting Program (74 pp, 3.1 MB, About PDF) is now available. A spreadsheet (224 K) with the underlying maximum impact and MERPs information for each hypothetical source is also available for download.

04/04/19 - A Clarification Memo on additional Methods, Determinations, and Analyses to Modify Air Quality Beyond Exceptional Events is now available.

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