South Carolina wastewater permits expiring in 2027
10 NPDES permits · 19 MGD combined average flow
10 publicly owned wastewater treatment plants in South Carolina hold NPDES permits that expire during 2027, issued by South Carolina Department of Environmental Services. The table lists each plant with its permit number, expiry month, average flow, treatment technology and three-year violation count, in order of expiry.
An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.
| Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|
| Newberry Bush River WWTF | Newberry | 2.3 | SC0024490 | May 2027 | 2 |
| Hartsville WWTF | Hartsville | 1.11 | SC0021580 | Jun 2027 | 8 |
| Rewa Piedmont Regional WWTP | Piedmont | 1.6 | SC0048470 | Aug 2027 | 0 |
| Renewable Water Resources/geor | Greenville | 1.38 | SC0047309 | Aug 2027 | 5 |
| Dairy Street Wastewater Treatment Plant | Ware Shoals | 0.91 | SC0020214 | Sep 2027 | 2 |
| Williamston Big Creek WWTP | Williamston | 0.36 | SC0046841 | Sep 2027 | 78 |
| Leo Fisher Wastewater Treatment Plant (ducworth) | Belton | 0.31 | SC0045896 | Sep 2027 | 6 |
| Dorchester Co Lower Dorchester WWTP | Dorchester | 6.84 | SC0038822 | Nov 2027 | 16 |
| Gsw&sa/george R Vereen WWTP | Conway | 4.61 | SC0041696 | Nov 2027 | 31 |
| Town Of Jonesville | Jonesville | 0.02 | SC0024988 | Nov 2027 | 0 |
South Carolina permit renewals in 2027: questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026.
Wastewater terms: NPDES permit · POTW · Biological nutrient removal · Tertiary treatment · Anaerobic digester · MGD · all terms
Cite this page
Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.
Klarifi. “NPDES permits expiring in 2027: South Carolina plants.” Updated October 26, 2026. https://klarifi.io/facilities/south-carolina/permits-expiring/2027Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.