South Carolina wastewater permits expiring in 2026
16 NPDES permits · 19 MGD combined average flow
16 publicly owned wastewater treatment plants in South Carolina hold NPDES permits that expire during 2026, 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) |
|---|---|---|---|---|---|
| Blacksburg Canoe Creek (new) | Blacksburg | 0.14 | SC0047457 | Jan 2026 | 0 |
| Saluda Town Of | Saluda | — | SC0022381 | Jan 2026 | 147 |
| Sumter Pocataligo River WWTP | Sumter | 9.19 | SC0027707 | Mar 2026 | 49 |
| Pendleton-Clemson Reg WWTF | Pendleton | 1.02 | SC0035700 | Mar 2026 | 41 |
| Gsw And Sa Loris Waste Water Treatment Facility | Loris | 0.24 | SC0025348 | Apr 2026 | 0 |
| Florence City Of Timmonsville WWTP | Timmonsville | 0.87 | SC0025356 | Jun 2026 | 50 |
| York Fishing Creek WWTF | York | 0.69 | SC0038156 | Jun 2026 | 13 |
| Chester Lando-Manetta Plant | Chester | 0.26 | SC0001741 | Jul 2026 | 7 |
| Walterboro City Of WWTP | Walterboro | 1.25 | SC0040436 | Sep 2026 | 35 |
| Batesburg-Leesville Waste Water Treatment Facility | Batesburg | 0.8 | SC0024465 | Sep 2026 | 2 |
| Dorchester Co Upper Dorchester Co WWTP | Saint George | 0.37 | SC0025844 | Sep 2026 | 0 |
| N Myrtle Beach Ocean Drive | North Myrtle Beach | 1.68 | SC0022152 | Oct 2026 | 0 |
| Cresent Beach WWTP | North Myrtle Beach | 1.08 | SC0022161 | Oct 2026 | 0 |
| Murrells Inlet Wastewater Treatment Plant | Murrells Inlet | 1.12 | SC0040959 | Nov 2026 | 2 |
| Richland Co Eastover Reg WWTP | Eastover | 0.4 | SC0047911 | Nov 2026 | 5 |
| Isle Of Palms Forest Trail Sd | Isle Of Palms | 0.08 | SC0025283 | Nov 2026 | 2 |
South Carolina permit renewals in 2026: 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 · Oxidation ditch · Anaerobic digester · 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 2026: South Carolina plants.” Updated October 26, 2026. https://klarifi.io/facilities/south-carolina/permits-expiring/2026Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.