Norwalk WPCF
East Norwalk, CT · Fairfield County · Publicly Owned Treatment Works
- Average flow
- 9.4 MGD
- Design flow
- 18 MGD
- NPDES permit
- CT0101249
- Expired
- Permit expires
- March 2026
- Population served
- 109,654
- CWNS 2022
Norwalk WPCF is a publicly owned wastewater treatment works in East Norwalk, Fairfield County, Connecticut treating an average of 9.4 million gallons per day against a permitted design capacity of 18 MGD, serving about 109,654 residents. Treatment on site includes clarifiers. It discharges under NPDES permit CT0101249 (expired), which expires in March 2026, with 9 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 9
- Effluent violations
- 9
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in East Norwalk
East Norwalk's capital improvement plan lists 2 water, sewer and wastewater line items worth $80M starting 2025–2025. The largest budgeted items are shown here.
| Project | Budget | Years |
|---|---|---|
| Collections System Rehabilitation | $50,000,000 | 2025–2030 |
| WWTP Rehabilitation/Improvement | $30,000,000 | 2025–2027 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
4 verified contacts for Norwalk WPCF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Norwalk WPCF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Connecticut
Westport · 3 mi away
1.46 MGD
New Canaan · 4 mi away
0.55 MGD
Stamford · 7 mi away
12.5 MGD
Fairfield · 9 mi away
5.9 MGD
Redding · 11 mi away
0.03 MGD
Bridgeport · 11 mi away
16.7 MGD
Greenwich · 13 mi away
5.4 MGD
Bridgeport · 13 mi away
4.1 MGD
Norwalk 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 February 16, 2025.