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

Grant County, North Dakota; Griggs County, North Dakota; and Hettinger County, North Dakota.  The Grant County Seat is Carson, North Dakota; the Griggs County Seat is Cooperstown, North Dakota; and the Hettinger County Seat is Mott, North Dakota.