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 Pleasants County, West Virginia, and

Pocahontas County, West Virginia, give the percentage contributions from specific air pollution sources.  The Pleasants County Seat is Saint Marys, West Virginia, and the Pocahontas County Seat is Marlinton, West Virginia.