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 Pasquotank County, North Carolina, and

Pender County, North Carolina, give the percentage contributions from specific air pollution sources.  The Pasquotank County Seat is Elizabeth City, North Carolina, and the Pender County Seat is Burgaw, North Carolina.