Winter Harbor WWTF
Winter Harbor, ME · Hancock County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- 0.13 MGD
- NPDES permit
- ME0100731
- Administratively continued
- Permit expires
- January 2021
- Population served
- 276
- CWNS 2022
Winter Harbor WWTF is a publicly owned wastewater treatment works in Winter Harbor, Hancock County, Maine treating an average of 0.02 million gallons per day against a permitted design capacity of 0.13 MGD, serving about 276 residents. It discharges under NPDES permit ME0100731 (administratively continued), which expires in January 2021, with 4 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Winter Harbor WWTF.
No verified contacts on file yet
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Bar Harbor · 6 mi away
0.82 MGD
Bar Harbor · 9 mi away
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Bar Harbor · 9 mi away
0.0013 MGD
Seal Harbor · 10 mi away
0.05 MGD
Mount Desert · 12 mi away
0.01 MGD
Northeast Harbor · 12 mi away
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Milbridge · 14 mi away
0.01 MGD
Blue Hill · 25 mi away
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Winter Harbor WWTF: 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 September 24, 2025.