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

Lemhi County, Idaho; Lewis County, Idaho; and Lincoln County, Idaho.  The Lemhi County Seat is Salmon, Idaho; the Lewis County Seat is Nezperce, Idaho; and the Lincoln County Seat is Shoshone, Idaho.