Grand Isle WWTF
Grand Isle, ME · Aroostook County · Publicly Owned Treatment Works
- Average flow
- 0.0052 MGD
- Design flow
- —
- NPDES permit
- ME0102318
- Effective
- Permit expires
- January 2027
- Population served
- 432
- CWNS 2022
Grand Isle WWTF is a publicly owned wastewater treatment works in Grand Isle, Aroostook County, Maine treating an average of 0.0052 million gallons per day, serving about 432 residents. It discharges under NPDES permit ME0102318 (effective), which expires in January 2027, with 58 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
- 58
- Effluent violations
- 11
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Grand Isle WWTF.
No verified contacts on file yet
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Nearby wastewater treatment plants in Maine
Madawaska · 10 mi away
0.23 MGD
Frenchville · 13 mi away
0.04 MGD
Fort Kent · 23 mi away
0.15 MGD
Wallagrass · 27 mi away
0.0012 MGD
Washburn · 36 mi away
0.05 MGD
Fort Fairfield · 37 mi away
0.16 MGD
Ashland · 47 mi away
0.04 MGD
Danforth · 112 mi away
0.02 MGD
Grand Isle 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.