Bangor Wastewater Treatment Facility
Bangor, ME · Penobscot County · Publicly Owned Treatment Works
- Average flow
- 4.38 MGD
- Design flow
- 18 MGD
- NPDES permit
- ME0100781
- Effective
- Permit expires
- July 2031
- Population served
- 38,856
- CWNS 2022
Bangor Wastewater Treatment Facility is a publicly owned wastewater treatment works in Bangor, Penobscot County, Maine treating an average of 4.38 million gallons per day against a permitted design capacity of 18 MGD, serving about 38,856 residents. Treatment on site includes clarifiers, attached growth, aerobic, biological treatment, other, biosolids mechanical dewatering, biosolids thickening and other unit processes. It discharges under NPDES permit ME0100781 (effective), which expires in July 2031, with 14 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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Attached Growth, Aerobic
unit processBiological Treatment, Other
unit processBiosolids Mechanical Dewatering
unit processBiosolids Thickening
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processSuspended Growth, Aerobic
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Compliance snapshot (last 3 years)
- Total violations
- 14
- Effluent violations
- 10
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Bangor 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 Bangor Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Maine
Veazie · 5 mi away
0.07 MGD
Old Town · 12 mi away
0.63 MGD
Old Town · 14 mi away
0.04 MGD
Bucksport · 15 mi away
0.23 MGD
Searsport · 23 mi away
0.05 MGD
Newport · 24 mi away
0.14 MGD
Castine · 27 mi away
0.03 MGD
Belfast · 27 mi away
0.42 MGD
Bangor 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 March 4, 2025.