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 Buchanan County, Virginia, and

Buckingham County, Virginia, give the percentage contributions from specific air pollution sources.  The Buchanan County Seat is Grundy, Virginia, and the Buckingham County Seat is Buckingham, Virginia.