Imperial County, California, 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 Imperial County, California, and

Inyo County, California, give the percentage contributions from specific air pollution sources.  The Imperial County Seat is El Centro, California, and the Inyo County Seat is Independence, California.