Clean Water Atlanta Home Logo
CLEAN WATER ATLANTA OVERVIEW DRINKING WATER WASTE WATER
sub_main_top_right
sub_main_middle_left sub_main_middle_right
sub_main_bottom_left sub_main_bottom_right
consent decree program management
stormwater
wq monitoring
sanitary sewer overflow
combined sewer overflow
 
Advanced Search
 
 
Overview Heading
 
Help Heading
 

History

A 19-square mile area of Atlanta, with Downtown as its center, is served by a combined sewer system. In a combined system, a single large sewer pipe carries both sewage and stormwater to a water reclamation center for treatment. Combined sewers were built from the late-1800s until the mid-1900's in many major metropolitan areas. The practice has since largely been discontinued.

During heavy rains, storm flows often exceed the capacity of the combined sewer pipe. The Atlanta sewer system was upgraded so that combined flow is diverted to one of seven CSO control facilities. When the rains exceed the treatment capacity of the CSO control facilities, screened and disinfected flows are discharged to a nearby stream or creek.

The City currently operates four CSO treatment facilities on the West side of Atlanta and three on the East side. The East Area facilities, installed in the mid-1980s, currently use storage (a tunnel at the Custer Avenue facility and a vault at the McDaniel facility) and treatment designed to eliminate trash and disinfect all overflows to reduce bacteria. The West Area facilities, installed in the early 1990s, treat overflows using screening and disinfection also designed to remove trash and reduce bacteria.


 
Copyright 2003 City of Atlanta, Depart of Watershed Management. All rights reserved
legal statement
privacy
disclaimer
site statistics