Abstract: The Environmental Protection Agency (EPA) compiles data on emission tonnages of air pollutants for US counties.  US Air Quality Gradebook ("AirGrades") source sheets such as this one for Rockdale County, Georgia, and

Schley County, Georgia, give the percentage contributions from specific air pollution sources.  The Rockdale County Seat is Conyers, Georgia, and the Schley County Seat is Ellaville, Georgia.