Pennington County, Minnesota, 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, Minnesota, and

Pine County, Minnesota, give the percentage contributions from specific air pollution sources.  The Pennington County Seat is Thief River Falls, Minnesota, and the Pine County Seat is Pine City, Minnesota.