Activated sludge and clarifiers: wastewater treatment plants in West Virginia
80 plants · 35% of the state · 87 MGD reported by 75 plants
Klarifi identifies 80 publicly owned wastewater treatment plants with activated sludge and clarifiers in West Virginia, 35% of the 228 plants in the state (87 MGD reported by 75 plants). The largest is Huntington WWTP in Huntington at 10.72 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 | 10.72 | WVL023159 | Dec 2030 | 72 |
| 2 | City Of Wheeling - Water Pollution Control Division | Wheeling | 6.65 | WV0023230 | Jun 2010 | 130 |
| 3 | Fairmont Wastewater Treatment Plant | Fairmont | 6.18 | WVL023353 | Dec 2030 | 52 |
| 4 | Clarksburg Sanitary Bd | Clarksburg | 5.7 | WV0023302 | Apr 2015 | 584 |
| 5 | Parkersburg Utility Board | Parkersburg | 5.53 | WVL023213 | Dec 2030 | 3 |
| 6 | South Charleston Wwtw | South Charleston | 4.7 | WV0023116 | Jan 2012 | 26 |
| 7 | Weirton, City Of | Weirton | 3.77 | WVL023108 | Dec 2030 | 84 |
| 8 | Princeton, City Of | Princeton | 3.64 | WVL023094 | Dec 2030 | 21 |
| 9 | Moorefield/hardy County Regional Wastewater | Moorefield | 2.79 | WV0106038 | May 2026 | 18 |
| 10 | Hurricane City Of | Hurricane | 2.7 | WVR030010 | Sep 2030 | 79 |
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 October 26, 2026.
Wastewater terms: Activated sludge · Biological nutrient removal · Equalization tank · POTW · MGD · all terms