Belfast Wastewater Treatment Facility
Belfast, ME · Waldo County · Publicly Owned Treatment Works
- Average flow
- 0.42 MGD
- Design flow
- 1.49 MGD
- NPDES permit
- ME0101532
- Expired
- Permit expires
- February 2021
- Population served
- 6,668
- CWNS 2022
Belfast Wastewater Treatment Facility is a publicly owned wastewater treatment works in Belfast, Waldo County, Maine treating an average of 0.42 million gallons per day against a permitted design capacity of 1.49 MGD, serving about 6,668 residents. Treatment on site includes biogas balloons, biosolids mechanical dewatering, dechlorination, disinfection, chlorine/ chloramine, primary clarification or sedimentation and other unit processes. It discharges under NPDES permit ME0101532 (expired), which expires in February 2021, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biogas balloons
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Biosolids Mechanical Dewatering
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processSuspended Growth, Aerobic
unit processUnlock 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
Decision-makers at Belfast Wastewater Treatment Facility.
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Nearby wastewater treatment plants in Maine
Searsport · 5 mi away
0.05 MGD
Castine · 11 mi away
0.03 MGD
Islesboro · 12 mi away
0.0024 MGD
Bucksport · 15 mi away
0.23 MGD
Camden · 15 mi away
0.32 MGD
Blue Hill · 21 mi away
0.04 MGD
North Haven · 22 mi away
0.0046 MGD
Unity · 22 mi away
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Belfast 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 April 3, 2025.