Abstract: The Environmental Protection Agency (EPA) compiles data on emission tonnages of air pollutants for US counties.  US Air Quality Gradebook ("AirGrades") source sheets give the percentage contributions from specific air pollution sources.  This source sheet is for

DeKalb County, Missouri; Dent County, Missouri; and Douglas County, Missouri.  The DeKalb County Seat is Maysville, Missouri; the Dent County Seat is Salem, Missouri; and the Douglas County Seat is Ava, Missouri.