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

Boone County, Arkansas; Bradley County, Arkansas; and Calhoun County, Arkansas.  The Boone County Seat is Harrison, Arkansas; the Bradley County Seat is Warren, Arkansas; and the Calhoun County Seat is Hampton, Arkansas.