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

Stonewall County, Texas; Sutton County, Texas; and Swisher County, Texas.  The Stonewall County Seat is Aspermont, Texas; the Sutton County Seat is Sonora, Texas; and the Swisher County Seat is Tulia, Texas.