Fairmont Wastewater Treatment Plant
Fairmont, WV · Marion County · Publicly Owned Treatment Works
- Average flow
- 4.4 MGD
- Design flow
- —
- NPDES permit
- WVL023353
- Effective
- Permit expires
- December 2030
- Population served
- 35,181
- CWNS 2022
Fairmont Wastewater Treatment Plant is a publicly owned wastewater treatment works in Fairmont, Marion County, West Virginia treating an average of 4.4 million gallons per day, serving about 35,181 residents. Treatment on site includes clarifiers, biogas silos, attached growth, anaerobic, biosolids aerobic digestion, biosolids mechanical dewatering and other unit processes. It discharges under NPDES permit WVL023353 (effective), which expires in December 2030, with 52 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Biogas silos
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Attached Growth, Anaerobic
unit processBiosolids Aerobic Digestion
unit processBiosolids Mechanical Dewatering
unit processBiosolids Thickening
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 52
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Fairmont Wastewater Treatment Plant.
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Carolina · 8 mi away
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Grafton · 11 mi away
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Mannington · 11 mi away
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Shinnston · 11 mi away
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Mannington · 12 mi away
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Lumberport · 14 mi away
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Fairmont Wastewater Treatment Plant: frequently asked 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; facility record last updated August 5, 2026.