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

Brown County, Wisconsin; Buffalo County, Wisconsin; and Burnett County, Wisconsin.  The Brown County Seat is Green Bay, Wisconsin; the Buffalo County Seat is Alma, Wisconsin; and the Burnett County Seat is Siren, Wisconsin.