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 Whitley County, Kentucky, and

Wolfe County, Kentucky, give the percentage contributions from specific air pollution sources.  The Whitley County Seat is Williamsburg, Kentucky, and the Wolfe County Seat is Campton, Kentucky.