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

Boundary County, Idaho; Butte County, Idaho; and Camas County, Idaho.  The Boundary County Seat is Bonners Ferry, Idaho; the Butte County Seat is Arco, Idaho; and the Camas County Seat is Fairfield, Idaho.