Lewis County, Washington, 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 Lewis County, Washington, and

Lincoln County, Washington, give the percentage contributions from specific air pollution sources.  The Lewis County Seat is Chehalis, Washington, and the Lincoln County Seat is Davenport, Washington.