Oxidation ditches: wastewater treatment plants in West Virginia
37 plants · 16% of the state · 18 MGD reported by 33 plants
Klarifi identifies 37 publicly owned wastewater treatment plants with oxidation ditches in West Virginia, 16% of the 228 plants in the state (18 MGD reported by 33 plants). The largest is Moorefield/hardy County Regional Wastewater in Moorefield at 2.79 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 West Virginia
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Moorefield/hardy County Regional Wastewater | Moorefield | 2.79 | WV0106038 | May 2026 | 18 |
| 2 | Bridgeport Wastewater Treatment Plant | Bridgeport | 1.87 | WV0025461 | Jun 2010 | 95 |
| 3 | Buckhannon Sewer Plant | Buckhannon | 1.17 | WV0032336 | May 2012 | 60 |
| 4 | Philippi City Of | Philippi | 1.02 | WV0021857 | Jun 2017 | 32 |
| 5 | Salt Rock Sewer Psd | Ona | 1 | WV0084450 | Apr 2013 | 29 |
| 6 | Green Valley-Glenwood Psd | Princeton | 0.96 | WVL082627 | Dec 2030 | 15 |
| 7 | Crab Orchard/macarthur Psd | Macarthur | 0.92 | WVL082309 | Dec 2030 | 9 |
| 8 | City Of New Martinsville | New Martinsville | 0.87 | WVL027472 | Dec 2030 | 2 |
| 9 | Welch City Of | Welch | 0.79 | WVL024589 | Dec 2030 | 207 |
| 10 | White Oak Psd | Scarbro | 0.7 | WV0044041 | Feb 2014 | 3 |
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 West Virginia
Oxidation ditches in other states
Oxidation ditches in West Virginia: 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: Oxidation ditch · Activated sludge · Biological nutrient removal · FOG · Equalization tank · all terms