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

Warren County, Missouri; Washington County, Missouri; and Wayne County, Missouri.  The Warren County Seat is Warrenton, Missouri; the Washington County Seat is Potosi, Missouri; and the Wayne County Seat is Greenville, Missouri.