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

Caribou County, Idaho; Cassia County, Idaho; and Clark County, Idaho.  The Caribou County Seat is Soda Springs, Idaho; the Cassia County Seat is Burley, Idaho; and the Clark County Seat is Dubois, Idaho.