Total Maximum Daily Load Documents

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https://dc.statelibrary.sc.gov/handle/10827/58584
The federal Clean Water Act (CWA) directs each state to review the quality of its waters every two years to determine if water quality standards are being met. A Total Maximum Daily Load (TMDL) is a written plan and analysis to determine the maximum pollutant load a waterbody can receive and still meet applicable water quality standards. These plans are released by DES's Bureau of Water.

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    Fecal Coliform Bacteria Total Maximum Daily Loads for Shellfish Monitoring Stations in Leadenwah Creek Shellfish Management Area 12B HUC 030502060403
    (South Carolina State Library, 2024-11) Varlik, Banu; South Carolina Department of Environmental Services, Bureau of Water
    §303(d) of the Clean Water Act (CWA) and EPA’s Water Quality Planning and Management Regulations require states to develop total maximum daily loads (TMDLs) for water bodies that are included on the §303(d) list of impaired waters. A TMDL is the maximum amount of pollutant a waterbody can assimilate while meeting water quality standards (WQS) for the pollutant of concern. All TMDLs include a waste load allocation (WLA) for any National Pollutant Discharge Elimination System (NPDES) permitted dischargers, a load allocation (LA) for all nonpoint sources, and an explicit and/or implicit margin of safety (MOS). This technical report describes the development of fecal coliform (FC) TMDLs for impaired shellfish monitoring stations 12B-55 and 12B-56 in Leadenwah Creek in Charleston County, South Carolina. These stations have been included in South Carolina’s combined 2020 and 2022 303(d) list of impaired waters for exceeding FC WQS for shellfish harvesting. South Carolina Department of Transportation (SCDOT) is a national pollutant discharge elimination system (NPDES) permitted transportation separate storm sewer (TS4), and Charleston County is an NPDES permitted Municipal Separate Storm Sewer (MS4) entity in this watershed, and both entities have been allocated a WLA.
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    Total Maximum Daily Load Document for E. coli Impairments at Myers Creek, Cedar Creek, Toms Creek, and Tributaries Within Hydrological Unit Codes 030501100310, 03050110305, 030501100306, 030501100307 and 030501100401
    (South Carolina State Library, 2024-10-28) Balogh, Erika; South Carolina Department of Environmental Services, Bureau of Water
    §303(d) of the Clean Water Act and EPA’s Water Quality Planning and Management Regulations (40 CFR - Protection of Environment 2017) require states to develop total maximum daily loads (TMDLs) for water bodies that are included on the §303(d) list of impaired waters. A TMDL is the maximum amount of pollutant a waterbody can assimilate while meeting water quality standards (WQS) for the pollutant of concern. All TMDLs include a waste load allocation (WLA) for any National Pollutant Discharge Elimination System (NPDES)-permitted dischargers, a load allocation (LA) for all nonpoint sources, and an explicit and/or implicit margin of safety (MOS). This technical report describes the development of Escherichia coli (E. coli) recreational use TMDLs for impaired water quality monitoring (WQM) stations in the Myers Creek, Cedar Creek, Toms Creek and its tributaries. These stations are C-075, C-077, C-076, C-072, S-950, and are located in Richland County, South Carolina. All 5 stations have been included in South Carolina’s draft 2024 303(d) list for exceeding the E. coli WQS for recreational use and have been prioritized for restoration.