Abstract: The Environmental Protection Agency (EPA) compiles data on emission tonnages of air pollutants for US counties.  US Air Quality Gradebook ("AirGrades") source sheets such as this one for Bandera County, Texas, and

Bastrop County, Texas, give the percentage contributions from specific air pollution sources.  The Bandera County Seat is Bandera, Texas, and the Bastrop County Seat is Bastrop, Texas.