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

St. Croix Island, Virgin Islands; St. John Island, Virgin Islands; and St. Thomas Island, Virgin Islands.  Christiansted, Virgin Islands, is on St. Croix Island; Cruz Bay, Virgin Islands, is on St. John Island; and Charlotte Amalie, Virgin Islands, is on St. Thomas Island.