Pennington County, South Dakota, Air Pollution Sources

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Abstract: The Environmental Protection Agency (EPA) compiles data on emission tonnages of air pollutants for US counties.  US Air Quality Gradebook ("AirGrades") source sheets such as this one for Pennington County, South Dakota, and

Perkins County, South Dakota, give the percentage contributions from specific air pollution sources.  The Pennington County Seat is Rapid City, South Dakota, and the Perkins County Seat is Bison, South Dakota.