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

Mississippi County, Arkansas; Monroe County, Arkansas; and Montgomery County, Arkansas.  The Mississippi County Seat is Blytheville, Arkansas; the Monroe County Seat is Clarendon, Arkansas; and the Montgomery County Seat is Mount Ida, Arkansas.