Return to Washington Air Pollution Sources Homepage
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 Thurston County, Washington, and |
Wahkiakum County, Washington, give the percentage contributions from specific air pollution sources. The Thurston County Seat is Olympia, Washington, and the Wahkiakum County Seat is Cathlamet, Washington. |