Activated sludge and clarifiers: wastewater treatment plants in West Virginia
81 plants · 35% of the state · 71 MGD reported by 74 plants
Klarifi identifies 81 publicly owned wastewater treatment plants with activated sludge and clarifiers in West Virginia, 35% of the 232 plants in the state (71 MGD reported by 74 plants). The largest is Huntington WWTP in Huntington at 9.5 MGD.
Activated sludge is the standard mechanical process for cities: aeration basins where bacteria consume organic matter, followed by clarifiers that settle the biomass out. These plants are identified by their circular or rectangular clarifiers and by the suspended-growth process code, and they are the main market for blowers, diffusers, clarifier mechanisms and instrumentation.
The largest activated sludge plants in West Virginia
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Huntington WWTP | Huntington | 9.5 | WVL023159 | Dec 2030 | 72 |
| 2 | The Sanitary Board Of The City Of Charleston, West Virginia | Charleston | 6.28 | WVL023205 | Dec 2030 | 6 |
| 3 | City Of Wheeling - Water Pollution Control Division | Wheeling | 4.8 | WV0023230 | Jun 2010 | 130 |
| 4 | Fairmont Wastewater Treatment Plant | Fairmont | 4.4 | WVL023353 | Dec 2030 | 52 |
| 5 | Parkersburg Utility Board | Parkersburg | 4.25 | WVL023213 | Dec 2030 | 3 |
| 6 | South Charleston Wwtw | South Charleston | 4 | WV0023116 | Jan 2012 | 27 |
| 7 | Clarksburg Sanitary Bd | Clarksburg | 3.99 | WV0023302 | Apr 2015 | 592 |
| 8 | Princeton, City Of | Princeton | 2.9 | WVL023094 | Dec 2030 | 21 |
| 9 | Moorefield/hardy County Regional Wastewater | Moorefield | 2.79 | WV0106038 | Jun 2021 | 18 |
| 10 | Weirton, City Of | Weirton | 2.41 | WVL023108 | Dec 2030 | 84 |
| 11 | Hurricane City Of | Hurricane | 2.2 | WVR030010 | Sep 2030 | 75 |
| 12 | Bridgeport Wastewater Treatment Plant | Bridgeport | 1.34 | WV0025461 | Jun 2010 | 93 |
| 13 | Martinsburg City Of WWTP | Martinsburg | 1.28 | WV0023167 | Dec 2012 | 59 |
| 14 | Rocky Fork Wastewater Plant | Cross Lanes | 1.13 | WVL037486 | Dec 2030 | 15 |
| 15 | City Of Ronceverte | Ronceverte | 1.1 | WV0024236 | Mar 2014 | 199 |
| 16 | City Of St. Albans | Saint Albans | 1.03 | WVL023175 | Dec 2030 | 1 |
| 17 | Sanitary Board | Barboursville | 0.89 | WV0024481 | Dec 2012 | 82 |
| 18 | Grafton City Of | Grafton | 0.83 | WVL021822 | Dec 2030 | 90 |
| 19 | Pea Ridge Public Svc | Barboursville | 0.8 | WV0027413 | Jun 2013 | 79 |
| 20 | Shady Spring Psd | Beaver | 0.76 | WV0080403 | Jun 2009 | 51 |
| 21 | Malden Public Service District | Charleston | 0.68 | WVL050610 | Dec 2030 | 0 |
| 22 | Weston City Of | Weston | 0.68 | WV0028088 | Jun 2015 | 252 |
| 23 | Welch City Of | Welch | 0.67 | WVL024589 | Dec 2030 | 197 |
| 24 | Buckhannon Sewer Plant | Buckhannon | 0.63 | WV0032336 | May 2012 | 61 |
| 25 | Philippi City Of | Philippi | 0.63 | WV0021857 | Jun 2017 | 32 |
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
Activated sludge and clarifiers in other states
Activated sludge and clarifiers 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 September 11, 2026.