Greenwich WPCF
Shore Road, Greenwich, CT 06830 · Fairfield County · Publicly Owned Treatment Works
- Average flow
- 6.44 MGD
- Design flow
- 12.5 MGD
- NPDES permit
- CT0100234
- Administratively continued
- Permit expires
- July 2024
- Population served
- 63,514
- CWNS 2022
Greenwich WPCF is a publicly owned wastewater treatment works in Greenwich, Fairfield County, Connecticut treating an average of 6.44 million gallons per day against a permitted design capacity of 12.5 MGD, serving about 63,514 residents. It discharges under NPDES permit CT0100234 (administratively continued), which expires in July 2024, with 4 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in March 2023.
Treatment technology
2 treatment structures and unit processes identified at Greenwich WPCF.
Available with a free Klarifi account
See the full treatment train at Greenwich WPCF: structures, unit processes and planned upgrades, with exact unit counts.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Greenwich WPCF in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Penalties assessed
- $535,000
- all cases
- Compliance actions
- $12M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Mar 2023
GREENWICH WPCF
Judicial case · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $250,000 · Compliance actions $11M
EPA's description of the case:
“Region I transmitted to OECA a Consent Decree that the Town of Greenwich, Connecticut (Town) has executed to resolve claims for violations of the Clean Water Act and the Town=s NPDES permit. On…”
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Source: EPA ECHO, civil enforcement case 01-2009-2031.
Full case history with a free Klarifi account
Every action against Greenwich WPCF with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Greenwich
Greenwich's capital improvement plan lists 12 water, sewer and wastewater line items worth $277M starting 2025–2030. The largest budgeted items are shown here.
All water and sewer capital projects in Greenwich →
| Project | Budget | Years |
|---|---|---|
| Grass Island Wastewater Treatment Plant - Asset Management | $118,950,000 | 2025–2040 |
| Sewer Rehab | $63,600,000 | 2026–2040 |
| OG Pump Station | $32,000,000 | 2025–2030 |
| Pump Station Rehabilitation | $23,070,000 | 2030–2040 |
| Chapel Lane Pump Station | $14,500,000 | 2028–2030 |
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
1 verified contact for Greenwich WPCF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Greenwich WPCF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Connecticut
Stamford · 5 mi away
13.83 MGD
New Canaan · 12 mi away
0.87 MGD
East Norwalk · 13 mi away
11.32 MGD
Westport · 15 mi away
1.84 MGD
Redding · 20 mi away
0.03 MGD
Fairfield · 21 mi away
7.87 MGD
Bridgeport · 24 mi away
17.54 MGD
Bridgeport · 26 mi away
5.24 MGD
Greenwich 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 April 23, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms