Norwalk WPCF
60 South Smith Street, East Norwalk, CT 06855 · Fairfield County · Publicly Owned Treatment Works
- Average flow
- 11.32 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 11.32 million gallons per day against a permitted design capacity of 18 MGD, serving about 109,654 residents. It discharges under NPDES permit CT0101249 (expired), which expires in March 2026, with 13 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in September 2022.
Treatment technology
One treatment structure or unit process identified at Norwalk WPCF.
Available with a free Klarifi account
See the full treatment train at Norwalk WPCF: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 13
- Effluent violations
- 13
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Norwalk WPCF in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Compliance actions
- $10M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Sep 2022
NORWALK CITY OF PUBLICALLY OWNED TREATMENT WORKS
Administrative order · CWA, NPDES Discharge without a Permit · Final Order No Penalty · Compliance actions $10M
EPA's description of the case:
“The Order addresses the City's unauthorized discharges of sewage from its sanitary sewer collection system ('Collection System') to waters of the United States and certain discharges from the…”
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Source: EPA ECHO, civil enforcement case 01-2017-2018.
Full case history with a free Klarifi account
Every action against Norwalk WPCF with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
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.
Unlock 4 verified contacts (1 more than shown)
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
1.84 MGD
New Canaan · 4 mi away
0.87 MGD
Stamford · 7 mi away
13.83 MGD
Fairfield · 9 mi away
7.87 MGD
Redding · 11 mi away
0.03 MGD
Bridgeport · 11 mi away
17.54 MGD
Greenwich · 13 mi away
6.44 MGD
Bridgeport · 13 mi away
5.24 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 October 26, 2026; facility record last updated February 16, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms