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

Garfield County, Montana; Glacier County, Montana; and Golden Valley County, Montana.  The Garfield County Seat is Jordan, Montana; the Glacier County Seat is Cut Bank, Montana; and the Golden Valley County Seat is Ryegate, Montana.