Meriden Water Pollution Control Facility
226 Evansville Avenue, Meriden, CT 06451 · New Haven County · Publicly Owned Treatment Works
- Average flow
- 9.93 MGD
- Design flow
- 11.6 MGD
- NPDES permit
- CT0100315
- Expired
- Permit expires
- December 2023
- Population served
- 61,647
- CWNS 2022
Meriden Water Pollution Control Facility is a publicly owned wastewater treatment works in Meriden, New Haven County, Connecticut treating an average of 9.93 million gallons per day against a permitted design capacity of 11.6 MGD, serving about 61,647 residents. It discharges under NPDES permit CT0100315 (expired), which expires in December 2023, with 10 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in September 2018.
Treatment technology
3 treatment structures and unit processes identified at Meriden Water Pollution Control Facility.
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See the full treatment train at Meriden Water Pollution Control Facility: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 10
- Effluent violations
- 10
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 Meriden Water Pollution Control Facility in EPA's ICIS system.
- Formal actions
- 3
- 0 since FY2020
- Penalties assessed
- $16,000
- all cases
- Compliance actions
- $15,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Sep 2018
CITY OF MERIDEN WATER POLLUTION CONTROL FACILITY
Administrative order · CWA, NPDES Permit Violations · Final Order No Penalty · Compliance actions $10,000
EPA's description of the case:
“On September 08, 2018, the Region issued an Administrative Order ( Order ) to the City of Meriden, Connecticut. The Order addresses the City's unauthorized discharges of sewage from its sanitary…”
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Source: EPA ECHO, civil enforcement case 01-2018-2025.
Full case history with a free Klarifi account
Every action against Meriden Water Pollution Control Facility with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
2 verified contacts for Meriden Water Pollution Control Facility, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Meriden Water Pollution Control Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Connecticut
Cheshire · 3 mi away
2.51 MGD
Southington (plantsville) · 5 mi away
4.5 MGD
Portland · 10 mi away
0.36 MGD
Beacon Falls · 14 mi away
0.34 MGD
East Hampton · 15 mi away
1.4 MGD
Thomaston · 16 mi away
0.92 MGD
Seymour · 17 mi away
1.12 MGD
Branford · 17 mi away
3.44 MGD
Meriden Water Pollution Control Facility: 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 March 27, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms