Northfield Wastewater Treatment Facility
Northfield, VT · Washington County · Publicly Owned Treatment Works
- Average flow
- 0.33 MGD
- Design flow
- —
- NPDES permit
- VT0100242
- Expired
- Permit expires
- September 2025
- Population served
- 4,424
- CWNS 2022
Northfield Wastewater Treatment Facility is a publicly owned wastewater treatment works in Northfield, Washington County, Vermont treating an average of 0.33 million gallons per day, serving about 4,424 residents. Treatment on site includes biogas silos, biological treatment, other, biosolids aerobic digestion, biosolids mechanical dewatering, chemical addition, alum and other unit processes. It discharges under NPDES permit VT0100242 (expired), which expires in September 2025, with 18 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biogas silos
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Biological Treatment, Other
unit processBiosolids Aerobic Digestion
unit processBiosolids Mechanical Dewatering
unit processChemical Addition, Alum
unit processChemical P Removal
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processScreening
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 18
- Effluent violations
- 18
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Northfield Wastewater Treatment Facility.
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Nearby wastewater treatment plants in Vermont
Williamstown · 7 mi away
0.07 MGD
Montpelier · 7 mi away
1.22 MGD
Plainfield · 14 mi away
0.03 MGD
Waterbury · 14 mi away
0.39 MGD
Randolph · 16 mi away
0.17 MGD
Marshfield · 20 mi away
0.02 MGD
Stowe · 21 mi away
0.28 MGD
Cabot · 23 mi away
0.02 MGD
Northfield Wastewater Treatment Facility: 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 January 26, 2025.