A sanitary sewer overflow, or SSO, is a discharge of raw sewage that overflows from a sewer onto the ground or into local streams and rivers. SSOs have many different causes, including: clogs, pipes breaking, power failures, undersized infrastructure, rain water entering leaky pipes, inadequate sewer capacity, sewer defects that allow stormwater and groundwater to overload the system, lapses in sewer system operation and maintenance, and vandalism. For more information click here or to report a suspected SSO call (803) 545-3300.