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 Blount County, Alabama, and

Bullock County, Alabama, give the percentage contributions from specific air pollution sources.  The Blount County Seat is Oneonta, Alabama, and the Bullock County Seat is Union Springs, Alabama.