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

McMullen County, Texas; Medina County, Texas; and Menard County, Texas.  The McMullen County Seat is Tilden, Texas; the Medina County Seat is Hondo, Texas; and the Menard County Seat is Menard, Texas.