Montpelier Wastewater Treatment Facility
Montpelier, VT · Washington County · Publicly Owned Treatment Works
- Average flow
- 1.22 MGD
- Design flow
- —
- NPDES permit
- VT0100196
- Administratively continued
- Permit expires
- September 2022
- Population served
- 10,429
- CWNS 2022
Montpelier Wastewater Treatment Facility is a publicly owned wastewater treatment works in Montpelier, Washington County, Vermont treating an average of 1.22 million gallons per day, serving about 10,429 residents. Treatment on site includes clarifiers, biogas silos, biogas balloons, biological treatment, other, biosolids anaerobic digestion with energy recovery and other unit processes. It discharges under NPDES permit VT0100196 (administratively continued), which expires in September 2022, with 0 recorded violations in the last three years. Planned upgrades on record: biosolids anaerobic digestion with energy recovery, biosolids drying.
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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Biogas balloons
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Biological Treatment, Other
unit processBiosolids Anaerobic Digestion with Energy Recovery
unit processBiosolids Mechanical Dewatering
unit processChemical Addition, Alum
unit processDisinfection, UV
unit processFlow Equalization
unit processScreening
unit processSludge Blanket, Anaerobic
unit processBiosolids Anaerobic Digestion with Energy Recovery
planned upgradeBiosolids Drying
planned upgradeUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Montpelier Wastewater Treatment Facility, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Montpelier Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Vermont
Northfield · 7 mi away
0.33 MGD
Plainfield · 9 mi away
0.03 MGD
Williamstown · 9 mi away
0.07 MGD
Waterbury · 10 mi away
0.39 MGD
Marshfield · 14 mi away
0.02 MGD
Stowe · 15 mi away
0.28 MGD
Cabot · 16 mi away
0.02 MGD
Morrisville · 21 mi away
0.23 MGD
Montpelier 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 May 29, 2025.