Seymour WPCF
Seymour, CT · New Haven County · Publicly Owned Treatment Works
- Average flow
- 0.89 MGD
- Design flow
- 2.93 MGD
- NPDES permit
- CT0100501
- Expired
- Permit expires
- March 2026
- Population served
- 19,233
- CWNS 2022
Seymour WPCF is a publicly owned wastewater treatment works in Seymour, New Haven County, Connecticut treating an average of 0.89 million gallons per day against a permitted design capacity of 2.93 MGD, serving about 19,233 residents. Treatment on site includes clarifiers. It discharges under NPDES permit CT0100501 (expired), which expires in March 2026, with 6 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
- 6
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Seymour WPCF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Seymour WPCF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Connecticut
Ansonia · 2 mi away
1.3 MGD
Shelton · 4 mi away
1.6 MGD
Beacon Falls · 5 mi away
0.28 MGD
Milford · 10 mi away
4.5 MGD
Newtown · 11 mi away
0.3 MGD
Stratford · 13 mi away
5.02 MGD
Bridgeport · 14 mi away
4.1 MGD
Bridgeport · 16 mi away
16.7 MGD
Seymour 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 27, 2025.