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 Stephens County, Georgia, and

Stewart County, Georgia, give the percentage contributions from specific air pollution sources.  The Stephens County Seat is Toccoa, Georgia, and the Stewart County Seat is Lumpkin, Georgia.