Oxidation ditches: wastewater treatment plants in South Carolina
25 plants · 20% of the state · 88 MGD combined
Klarifi identifies 25 publicly owned wastewater treatment plants with oxidation ditches in South Carolina, 20% of the 122 plants in the state (88 MGD combined). The largest is Gsw&sa Schwartz Myrtle Beach & Bucksport Reg Wwtps in Conway at 14.9 MGD.
Oxidation ditches are ring-shaped activated sludge reactors with long retention times, common at plants between 0.5 and 10 MGD. They are recognisable from the air by their looped channels and rely on surface aerators or brush rotors, which are frequent replacement and energy-efficiency projects.
The largest oxidation ditch plants in South Carolina
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Gsw&sa Schwartz Myrtle Beach & Bucksport Reg Wwtps | Conway | 14.9 | SC0037753 | Jul 2030 | 9 |
| 2 | Lower Berkeley Wastewater Treatment Plant | Goose Creek | 8.6 | SC0046060 | Apr 2024 | 1 |
| 3 | Pelham WWTP | Greer | 8.2 | SC0033804 | Dec 2023 | 1 |
| 4 | Rifle Range Wastewater Treatment Facility | Mount Pleasant | 7.3 | SC0040771 | Apr 2030 | 0 |
| 5 | Bjw&sa Cherry Point WWTP | Ridgeland | 7.12 | SC0047279 | Oct 2029 | 1 |
| 6 | Dorchester Co Lower Dorchester WWTP | Dorchester | 6.7 | SC0038822 | Nov 2027 | 20 |
| 7 | Summerville WWTF | Summerville | 4.8 | SC0037541 | Nov 2024 | 7 |
| 8 | Gsw&sa/george R Vereen WWTP | Conway | 4.75 | SC0041696 | Nov 2027 | 31 |
| 9 | Bjw&sa Port Royal Water Recl Fac | Port Royal | 4.44 | SC0048348 | Jan 2029 | 0 |
| 10 | Orangeburg WWTF | Orangeburg | 3.8 | SC0024481 | Sep 2020 | 0 |
| 11 | Gsw&sa/conway WWTP | Conway | 2.87 | SC0021733 | Mar 2028 | 29 |
| 12 | Bcw&sa Central Berkeley WWTP | Goose Creek | 2.78 | SC0039764 | Apr 2030 | 4 |
| 13 | Newberry Bush River WWTF | Newberry | 1.95 | SC0024490 | May 2027 | 2 |
| 14 | Dillon Little Pee Dee | Dillon | 1.46 | SC0021776 | Aug 2028 | 5 |
| 15 | Kingstree Wastewater Treatment Plant | Kingstree | 1.24 | SC0035971 | Apr 2030 | 5 |
| 16 | Murrells Inlet Wastewater Treatment Plant | Murrells Inlet | 1.12 | SC0040959 | Nov 2026 | 2 |
| 17 | Marion/s Main St WWTF | Marion | 1.06 | SC0046230 | May 2024 | 0 |
| 18 | Chapin Sewage System | Chapin | 0.97 | SC0040631 | Jun 2023 | 2 |
| 19 | Moncks Corner WWTF | Moncks Corner | 0.95 | SC0021598 | Dec 2025 | 25 |
| 20 | Batesburg-Leesville Waste Water Treatment Facility | Batesburg | 0.87 | SC0024465 | Sep 2026 | 2 |
| 21 | Bjw&sa Hardeeville Church Road | Hardeeville | 0.66 | SC0034584 | Dec 2021 | 0 |
| 22 | Sullivans Island WWTF | Sullivans Island | 0.38 | SC0020052 | Dec 2023 | 0 |
| 23 | Richland Co Eastover Reg WWTP | Eastover | 0.38 | SC0047911 | Nov 2026 | 6 |
| 24 | Combined Utility System | Easley | 0.33 | SC0023043 | Aug 2021 | 1 |
| 25 | Saluda Town Of | Saluda | 0.26 | SC0022381 | Jan 2026 | 147 |
Contacts and project signals for every plant on this list
Klarifi adds verified decision-maker contacts, permit limits, discharge monitoring data and the capital projects planned in each city, filterable by technology, size and compliance record.
Other technologies in South Carolina
Oxidation ditches in other states
Oxidation ditches in South Carolina: 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 September 11, 2026.