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 McPherson County, Kansas, and

Meade County, Kansas, give the percentage contributions from specific air pollution sources.  The McPherson County Seat is McPherson, Kansas, and the Meade County Seat is Meade, Kansas.