Client project details

Atlanta Regional Planning Commission (Water Supply Source Evaluation - Groundwater Resource Feasibility Review)

The Project

The Atlanta Regional Commission (ARC) is the regional planning and intergovernmental coordination agency for the 10-county area including Cherokee, Clayton, Cobb, DeKalb, Douglas, Fayette, Fulton, Gwinnett, Henry and Rockdale Counties, and the City of Atlanta.  In the mid-1990s, Georgia was experiencing rapid population growth and the ARC thought it prudent to evaluate the groundwater resources available in their region.


In the 10-county region surrounding Atlanta, Georgia, EGGI evaluated the Favorability for new groundwater development across a study area of roughly 8,000 km2. EGGI determined what regional areas were favorable based upon a detailed evaluation of rock type, geologic setting, presence of major contaminant threats, and other important hydrogeological factors. Land masses in each county that were deemed to be unfavorable for groundwater development were subsequently excluded from further consideration. Each county was objectively ranked in terms of its overall Favorability for new groundwater development. During later phases of investigation, Favorable sub-areas within each county were identified for specific groundwater development activities. At the time of EGGI’s investigation, the USGS and other industry “experts” argued that the sustainable development of material new groundwater supplies was not viable in or around the Atlanta region. However, EGGI’s regional investigation determined that over 100 million gallons per day (MGD) of previously undetected renewable groundwater resources could be sustainably developed within the 10-county region. EGGI has identified nearly 15 MGD of new groundwater resources at site specific locations within 3 of those Counties to-date and continues to consistently develop new groundwater resources within the region to this day.




Using published maps on the bedrock geology, databases on land uses that could threaten groundwater quality, and other factors, EGGI scientists developed groundwater development 'exclusion' maps.


P.O. Box 1578
56 Main Street
Meredith, NH 03253
T: (603) 279-4425
F: (603) 279-8717

“Data and research provide the underpinning for sound local water management decision-making that advances the well-being of the nation’s citizens, economy, and environment.”

- National Ground Water Association