Webthe dekalb county department of watershed management (dwm) was established in 1942. The department currently services over 5,000 miles of water and wastewater. Webuse our interactive map to view service status for your address or view detailed information about your water system, such as permits. Webthe chattahoochee river is the drinking water for dekalb county. The water is treated at the scott candler water filter plant and then distributed to dekalb county customers. Where can i get information about the quality of my water? Dekalb county ceo michael thurmond. Webjun…