Abstract: The Environmental Protection Agency (EPA) compiles data on emission tonnages of air pollutants for US counties.  US Air Quality Gradebook ("AirGrades") source sheets give the percentage contributions from specific air pollution sources.  This source sheet is for

Skagway-Hoonah-Angoon Census Area, Alaska; Southeast Fairbanks Census Area, Alaska; and Valdez-Cordova Census Area, Alaska.  Skagway, Alaska, is in the Skagway-Hoonah-Angoon Census Area; Delta Junction, Alaska, is in the Southeast Fairbanks Census Area; and Valdez, Alaska, is in the Valdez-Cordova Census Area.