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 Barber County, Kansas, and

Barton County, Kansas, give the percentage contributions from specific air pollution sources.  The Barber County Seat is Medicine Lodge, Kansas, and the Barton County Seat is Great Bend, Kansas.