Thomaston Waste Water Treatment Facility
33 Clark Street, Thomaston, ME 04861 · Knox County · Publicly Owned Treatment Works
- Average flow
- 0.01 MGD
- Design flow
- 0.46 MGD
- NPDES permit
- ME0100668
- Administratively continued
- Permit expires
- September 2023
- Population served
- 2,739
- CWNS 2022
Thomaston Waste Water Treatment Facility is a publicly owned wastewater treatment works in Thomaston, Knox County, Maine treating an average of 0.01 million gallons per day against a permitted design capacity of 0.46 MGD, serving about 2,739 residents. It discharges under NPDES permit ME0100668 (administratively continued), which expires in September 2023, with 3 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Thomaston Waste Water Treatment Facility.
Available with a free Klarifi account
See the full treatment train at Thomaston Waste Water Treatment Facility: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Thomaston Waste Water Treatment Facility.
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Nearby wastewater treatment plants in Maine
Warren · 1 mi away
0.14 MGD
Rockland · 5 mi away
0.1 MGD
Camden · 11 mi away
0.67 MGD
Nobleboro · 16 mi away
0.0061 MGD
North Haven · 17 mi away
0.01 MGD
North Haven · 17 mi away
0.00072 MGD
Vinalhaven · 18 mi away
0.01 MGD
Islesboro · 18 mi away
0.02 MGD
Thomaston Waste Water 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 October 26, 2026; facility record last updated February 3, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms