Thomaston WPCF
Thomaston, CT · Litchfield County · Publicly Owned Treatment Works
- Average flow
- 0.7 MGD
- Design flow
- 1.38 MGD
- NPDES permit
- CT0100781
- Administratively continued
- Permit expires
- June 2022
- Population served
- 7,453
- CWNS 2022
Thomaston WPCF is a publicly owned wastewater treatment works in Thomaston, Litchfield County, Connecticut treating an average of 0.7 million gallons per day against a permitted design capacity of 1.38 MGD, serving about 7,453 residents. Treatment on site includes biogas silos. It discharges under NPDES permit CT0100781 (administratively continued), which expires in June 2022, with 1 recorded violation in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biogas silos
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Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Thomaston WPCF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Thomaston WPCF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Connecticut
Torrington · 10 mi away
2.99 MGD
Bantam · 10 mi away
0.27 MGD
Southington (plantsville) · 12 mi away
3.67 MGD
Cheshire · 13 mi away
1.85 MGD
Canton · 14 mi away
0.49 MGD
Beacon Falls · 15 mi away
0.28 MGD
Meriden · 16 mi away
6.49 MGD
New Hartford · 17 mi away
0.04 MGD
Thomaston WPCF: 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 11, 2026.