New Canaan Wastewater Treatment Plant
New Canaan, CT · Fairfield County · Publicly Owned Treatment Works
- Average flow
- 0.55 MGD
- Design flow
- 1.7 MGD
- NPDES permit
- CT0101273
- Expired
- Permit expires
- January 2026
- Population served
- 20,732
- CWNS 2022
New Canaan Wastewater Treatment Plant is a publicly owned wastewater treatment works in New Canaan, Fairfield County, Connecticut treating an average of 0.55 million gallons per day against a permitted design capacity of 1.7 MGD, serving about 20,732 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit CT0101273 (expired), which expires in January 2026, with 4 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
- 4
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for New Canaan Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at New Canaan Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Connecticut
East Norwalk · 4 mi away
9.4 MGD
Westport · 6 mi away
1.46 MGD
Stamford · 7 mi away
12.5 MGD
Redding · 8 mi away
0.03 MGD
Greenwich · 12 mi away
5.4 MGD
Fairfield · 12 mi away
5.9 MGD
Bridgeport · 14 mi away
16.7 MGD
Bridgeport · 16 mi away
4.1 MGD
New Canaan 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 August 3, 2026.