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Recent Additions
1/31/12 The Federal Register Notice announcing the 10th Conference on Air Quality Models has been published.
1/30/12 A brief update on the 2012 EPA Regional, State, and Local Modelers' Workshop is now available.
1/24/12 An informational web page for the 10th Conference on Air Quality Models is now available. The Conference is scheduled for March 13-15, 2012 at the EPA Campus in RTP, NC.
12/21/11 An updated version of AERMOD, dated 11353, has been posted on the AERMOD webpage. This update corrects a significant bug related to use of the MAXDCONT option with urban sources, as well as a few other minor bugs. Model Change Bulletin #6 (MCB#6) provides a summary of changes incorporated into version 11353 of AERMOD.
12/21/11 A limited update to AERMINUTE (dated 11325, 11/21/2011) is now available. A summary of AERMINUTE changes is provided in MCB#1.
10/24/11 A Model Clearinghouse memo, "Model Clearinghouse Review of Equivalent Building Dimensions for AERMOD" is now available.
10/19/11 The Draft SO2 NAAQS Implementation Guidance webinar presentation is available.
8/25/11 An updated version of the lead post-processing tool, LEADPOST has been posted to SCRAM. Version 11237 now outputs the final averages in exponential format with 6 significant figures.
7/21/11 A memo regarding a"Revised Policy to Address Reconsideration of Interpollutant Trading Provisions for Fine Particles (PM2.5)" is now available. The memo announces a change in the policy concerning the development and adoption of interpollutant trading (offset) provisions for PM2.5.
7/5/11 The presentations from the 2011 EPA Regional, State, and Local Dispersion Modeling Workshop in Atlanta, GA are now available.
6/28/11 An "Update to the 24 Hour PM2.5 NAAQS Modeled Attainment Test" is now available. This new version replaces section 5.2 of the 2007 PM2.5 modeling guidance.
5/6/11 A Model Clearinghouse memo, "Model Clearinghouse Review of AERMOD-COARE as an Alternative Model for Application in an Arctic Marine Ice Free Environment," is now available.
5/6/11 Limited updates to AERSCREEN (version 11126) are now available. A summary of changes can be found in MCB #3.
4/14/11 A limited update to AERMAP (dated 11103, 04/13/2011) is now available. A summary of AERMAP changes is provided in MCB#3.
4/11/11 A clarification memo regarding status of AERSCREEN as EPA recommended screening model has been released. AERSCREEN (Version 11076) was released on 3/17/11 including updated MAKEMET (Version 09183) with documentation and test cases.
4/8/11 The updated AERMET files (version 11059) is available on the AERMET page. Model Change Bulletin #2 (MCB#2) provides a summary of changes incorporated into version 11059 of AERMET.
3/25/11 A guidance memo regarding "Area Designations for the 2010 Revised Primary Sulfur Dioxide National Ambient Air Quality Standards" is now available.
3/1/11 A clarification memo regarding "Additional Clarification Regarding Applicability of Appendix W Modeling Guidance for the 1-hour NO2 NAAQS" has been issued to assist in PSD permit modeling for NO2 with applicability to SO2 NAAQS as well.
This website is maintained by EPA's Air Quality Modeling Group (AQMG). The AQMG conducts modeling analyses to support policy and regulatory decisions in the Office of Air and Radiation (OAR) and provides leadership and direction on the full range of air quality models and other mathematical simulation techniques used in assessing control strategies and source impacts. Documentation and guidance for these air quality models can be found on this website, including downloadable computer code, input data, and model processors.
You will need Adobe Acrobat Reader to view the Adobe PDF files on this site. See EPA's PDF page for more information about getting and using the free Acrobat Reader.
This site contains the following sections.
Air Quality Models - Provides descriptions and documentation for three types of air quality models: dispersion, photochemical, and receptor models. Also provided with the dispersion modeling section are source code and associated user's guides and documentation for preferred/recommended models, screening models, and alternative models.
Modeling Applications and Tools - Provides more detailed information on modeling analyses AQMG has conducted to support policy and regulatory decisions in OAR including assessment of control strategies and source culpability. In addition, this site provides access to EPA developed tools for use in State Implementation Plan (SIP) demonstrations and other air quality modeling assessments.
Modeling Guidance & Support - Provides current guidance for applying air quality models for regulatory applications for both State Implementation Plans (SIP) demonstrations and revisions, as well as permit applications for new source reviews including Prevention of Significant Deterioration (PSD) regulations. Included is the Model Clearinghouse which is designed to help record the interpretation of modeling guidance for specific regulatory applications. Also included in this area are links to modeling contacts within the EPA Regional Offices and State environmental agencies.
Meteorological Data & Processors - Provides information on Meteorological data used in air quality models as derived from both ambient measurements and meteorological models. Processors based on these two main sources of meteorological data are also provided.
Conferences & Workshops - Provides announcements and related information for upcoming meetings, conferences, and workshops including agendas, review materials, and links.
Reports & Journal Articles - Provides access to reports developed by AQMG staff as well as a bibliographic listing of journal articles they have authored or co-authored.
Related Links --- Provides website links of interest to air quality modelers and policy analysts.
About AQMG -Provides a link to the group's website with background information, principle roles/responsibilities, staff names and contact information.
Employment Opportunities: AQMG currently has no open positions to fill. As positions become open, AQMG will update this website with details. In addition, job announcements can be found on the internet at the Office of Personnel Management website. The easiest way to find the announcement is to look for openings located in Research Triangle Park, North Carolina.
If you would like to be notified when we have a position for which you may be interested in applying, you may send a resume to Tyler Fox, Group Leader at: Fox.Tyler@epa.gov.