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

Hamilton County, Texas; Hansford County, Texas; and Hardeman County, Texas.  The Hamilton County Seat is Hamilton, Texas; the Hansford County Seat is Spearman, Texas; and the Hardeman County Seat is Quanah, Texas.