The South Cobb Water Reclamation Facility (WRF) is an award-winning wastewater treatment facility located in Austell. For over 50 years, the South Cobb WRF has been treating wastewater in the southwest corner of Cobb County.
The original South Cobb Water Reclamation Facility was constructed in 1963. Situated on 18 acres in the 18th District on the Chattahoochee River, the plant was sized originally to treat 2 million gallons per day (mgd). In 1973, the liquid process train was expanded to treat 8 mgd. A second liquid process train was added in 1976, allowing the plant to process 24 mgd. A sludge pelletization plant was installed for solids handling. Improvements were made in 1989 to increase the plant capacity to 28 mgd. A ferrous chloride feed facility was constructed in 1990.
In 1992, the sludge gravity thickeners were converted to a dissolved air flotation thickener system. 1998, the two liquid process trains were combined into one, and plant capacity was increased to 40 mgd. Belt presses replaced the pelletization system in the solids handling facility. Improvements were made in 2004, with the addition of a bar screen and an odor control system at the headworks.
A new chlorination/dechlorination system was constructed in 2005. The plant was further upgraded in 2011 with the addition of a fifth clarifier, effluent filters, a reuse pumping station, and a plant recycle station. In 2015, dewatering centrifuges replaced the belt presses. In the chlorine system, sodium hypochlorite pumps and sodium bisulfite pumps were replaced. The influent lift station was placed into service in 2016. This pump station is 200 feet below ground and is the terminus of the 24-foot diameter South Cobb Tunnel.
490 Lee Industrial Blvd
Austell, GA 30168
770-819-3204
Capacity: 40 million gallons per day.
Serves: South Cobb, portions of West Cobb, Austell, Powder Springs and Mableton