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

Potter County, South Dakota; Roberts County, South Dakota; and Sanborn County, South Dakota.  The Potter County Seat is Gettysburg, South Dakota; the Roberts County Seat is Sisseton, South Dakota; and the Sanborn County Seat is Woonsocket, South Dakota.