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

Pierce County, North Dakota; Ramsey County, North Dakota; and Ransom County, North Dakota.  The Pierce County Seat is Rugby, North Dakota; the Ramsey County Seat is Devils Lake, North Dakota; and the Ransom County Seat is Lisbon, North Dakota.