Piacenti Wastewater Treatment Plant
New London, CT · New London County · Publicly Owned Treatment Works
- Average flow
- 4.66 MGD
- Design flow
- 10 MGD
- NPDES permit
- CT0100382
- Effective
- Permit expires
- April 2027
- Population served
- 64,095
- CWNS 2022
Piacenti Wastewater Treatment Plant is a publicly owned wastewater treatment works in New London, New London County, Connecticut treating an average of 4.66 million gallons per day against a permitted design capacity of 10 MGD, serving about 64,095 residents. Treatment on site includes clarifiers, aerated lagoons, biogas silos. It discharges under NPDES permit CT0100382 (effective), which expires in April 2027, with 8 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 8
- Effluent violations
- 8
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Piacenti Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Piacenti Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Connecticut
Montville (uncasville) · 7 mi away
0.75 MGD
Mystic · 7 mi away
0.42 MGD
Ledyard · 9 mi away
0.08 MGD
Stonington · 10 mi away
0.21 MGD
Deep River · 18 mi away
0.18 MGD
Baltic · 19 mi away
0.07 MGD
East Haddam · 20 mi away
0.01 MGD
Plainfield · 24 mi away
0.27 MGD
Piacenti Wastewater Treatment Plant: 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 27, 2025.