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

Adams County, Nebraska; Antelope County, Nebraska; and Arthur County, Nebraska.  The Adams County Seat is Hastings, Nebraska; the Antelope County Seat is Neligh, Nebraska; and the Arthur County Seat is Arthur, Nebraska.