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

Dawson County, Montana; Deer Lodge County, Montana; and Fallon County, Montana.  The Dawson County Seat is Glendive, Montana; the Deer Lodge County Seat is Anaconda, Montana; and the Fallon County Seat is Baker, Montana.