Walla Walla County, Washington, Air Pollution Sources A

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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

Walla Walla County, Washington, give the percentage contributions from specific air pollution sources.  The Walla Walla County Seat is Walla Walla, Washington.