Atlanta Regional CouncilThe Atlanta Regional Commission (ARC) is the regional planning and intergovernmental coordination agency for the 10-county Atlanta area, including Cherokee, Clayton, Cobb, DeKalb, Douglas, Fayette, Fulton, Gwinnett, Henry and Rockdale counties, as well as the City of Atlanta.
ARC also produces and collects data for a larger, 20-county area for air quality purposes. These include the 10 counties above, plus Barrow, Bartow, Carroll, Coweta, Forsyth, Hall, Newton, Paulding, Spalding and Wa