City of Aiken Watersheds/TMDLs (Total Maximum Daily Load)
It is required that the City of Aiken (City) determine whether stormwater discharges from any part of the MS4 contribute directly or indirectly to a water body considered impaired by the SCDHEC 303(d) list. The City of Aiken discharges to Horse Creek via the Sand River outfall. There is a Total Maximum Daily Load (TMDL) established for the Horse Creek Watershed for Fecal Coliform (FC). The TMDL requires a 47% reduction in FC. At a minimum, the City must describe how implementation of the SWMP will provide reasonable assurance that discharges will not cause or contribute to violations of water quality standards.
In order to do this, the City employs efforts such as Illicit Discharge Detection and Elimination (IDDE) procedures, review of sanitary sewer system in order to attempt elimination or reduction of sanitary sewer overflows (SSOs), and public outreach and education awareness. In addition, the City has developed a TMDL Monitoring and Assessment Plan to strategically implement these efforts via watershed and prioritized need. Below are links to the City’s watershed maps and TMDL plans.