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 Echols County, Georgia, and

Effingham County, Georgia, give the percentage contributions from specific air pollution sources.  The Echols County Seat is Statenville, Georgia, and the Effingham County Seat is Springfield, Georgia.