Clark 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 Clark County, South Dakota, and

Clay County, South Dakota, give the percentage contributions from specific air pollution sources.  The Clark County Seat is Clark, South Dakota, and the Clay County Seat is Vermillion, South Dakota.