Air Quality Modeling

The Georgia Air Protection Branch provides guidance documents and relevant data that may be used for permit modeling in Georgia.

Prevention of Significant Deterioration (PSD) Modeling

• PSD Basic Information
• Georgia EPD PSD Permit Application Guidance Document (Updated, February 3, 2017)
• Georgia Background Data (Updated, November 30, 2023)
• List of Minor Source Baseline Dates (Updated, May 2022)
• Georgia PSD Inventory Tool
• Georgia AERMET Data (Updated, January 4, 2024)
• Georgia ISC Meteorological Data
• Georgia MERPs Guidance (Updated, February 25, 2019)
• 1992 NLCD – Georgia (*.tif) (Updated, June 13, 2019)

Toxic Air Pollutants (TAP) Modeling

• Toxics Impact Assessment Guideline (Updated, May 2017)
• Factsheet
• Appendix A – list of TAP, AAC, and MER (updated Oct 2018)

Quarry Modeling (PM10)

• Guideline for Modeling PM10 Ambient Concentration in Areas Impacted by Quarry Operation Producing Crushed Stone (Updated, September 27, 2013)

EPA Dispersion Modeling Information

• Air Quality Dispersion Modeling
• 2017 Appendix W Final Rule - Guideline on Air Quality Models
• AERMOD Modeling System
• Clarification Memos for Dispersion Models

If you have any permit modeling related questions, please contact Permit Modeling of the Georgia EPD, Air Protection Branch at (470) 524-0734. Please visit Permitting Programs for any permitting related questions and contact information.