Oxidation ditches: wastewater treatment plants in Virginia
29 plants · 13% of the state · 20 MGD reported by 28 plants
Klarifi identifies 29 publicly owned wastewater treatment plants with oxidation ditches in Virginia, 13% of the 223 plants in the state (20 MGD reported by 28 plants). The largest is Middle River Regional WWTP in Verona at 3.03 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 Virginia
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Middle River Regional WWTP | Verona | 3.03 | VA0064793 | Feb 2031 | 0 |
| 2 | Fredericksburg Wastewater Treatment Facility | Fredericksburg | 2.33 | VAL025127 | Dec 2030 | 12 |
| 3 | Parkins Mills Wastewater Treat | Winchester | 1.96 | VAL075191 | Dec 2030 | 43 |
| 4 | Big Stone Gap Regional WWTP | Big Stone Gap | 1.71 | VAL020940 | Dec 2030 | 4 |
| 5 | Town Of Luray | Luray | 1.22 | VA0062642 | Mar 2031 | 9 |
| 6 | Lexington-Rockbridge Regional Wqcf | Lexington | 0.96 | VAL088161 | Dec 2030 | 0 |
| 7 | Wilderness Wastewater Treatment Plant | Locust Grove | 0.87 | VA0083411 | Sep 2027 | 2 |
| 8 | Rocky Mount Town Sewage Treatment Plant | Rocky Mount | 0.77 | VAL085952 | Dec 2030 | 0 |
| 9 | South Hill WWTP | South Hill | 0.74 | VA0069337 | Aug 2028 | 0 |
| 10 | Lawrenceville STP | Lawrenceville | 0.74 | VA0020354 | Aug 2030 | 0 |
| 11 | Strasburg STP | Strasburg | 0.65 | VA0020311 | Apr 2028 | 0 |
| 12 | Parham Landing WWTP | West Point | 0.57 | VA0088331 | Sep 2030 | 2 |
| 13 | Caroline County Regional Sewage Treatment Plant | Ruther Glen | 0.5 | VA0073504 | Apr 2029 | 5 |
| 14 | Woodstock STP | Woodstock | 0.5 | VA0026468 | Feb 2031 | 26 |
| 15 | Scott County Psa - Holston Regional WWTP | Weber City | 0.47 | VA0067351 | Apr 2029 | 0 |
| 16 | Town Of Tappahannock Wastewater Treatment Plant | Tappahannock | 0.42 | VA0071471 | May 2028 | 0 |
| 17 | Washington Cnty Service Authority -Hall Creek WWTP | Glade Spring | 0.4 | VA0087378 | Jan 2023 | 3 |
| 18 | Hillsville WWTP | Hillsville | 0.36 | VA0089443 | Oct 2030 | 5 |
| 19 | Chilhowie Regional Wastewater Treatment Plant | Chilhowie | 0.32 | VA0026379 | May 2026 | 1 |
| 20 | Pennington Gap STP | Pennington Gap | 0.29 | VA0029599 | Aug 2030 | 1 |
| 21 | Rutledge Creek WWTP | Amherst | 0.26 | VA0031321 | Nov 2029 | 26 |
| 22 | Claypool Hill Wastewater Treatment Plant | Cedar Bluff | 0.2 | VA0064271 | Jun 2026 | 0 |
| 23 | Rapidan WWTP | Ruckersville | 0.19 | VA0090948 | Nov 2027 | 45 |
| 24 | Boydton WWTP | Boydton | 0.15 | VA0026247 | May 2031 | 0 |
| 25 | Stanley STP | Stanley | 0.12 | VA0064394 | Sep 2026 | 0 |
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 Virginia
Oxidation ditches in other states
Oxidation ditches in 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 September 11, 2026.