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

Crowley County, Colorado; Custer County, Colorado; and Delta County, Colorado.  The Crowley County Seat is Ordway, Colorado; the Custer County Seat is Westcliffe, Colorado; and the Delta County Seat is Delta, Colorado.