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 Giles County, Tennessee, and

Grainger County, Tennessee, give the percentage contributions from specific air pollution sources.  The Giles County Seat is Pulaski, Tennessee, and the Grainger County Seat is Rutledge, Tennessee.