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

Davis County, Utah; Duchesne County, Utah; and Emery County, Utah.  The Davis County Seat is Farmington, Utah; the Duchesne County Seat is Duchesne, Utah; and the Emery County Seat is Castle Dale, Utah.