Middleport STP
Middleport, NY · Niagara County · Publicly Owned Treatment Works
- Average flow
- 0.18 MGD
- Design flow
- 0.7 MGD
- NPDES permit
- NY0022331
- Administratively continued
- Permit expires
- January 2020
- Population served
- 1,940
- CWNS 2022
Middleport STP is a publicly owned wastewater treatment works in Middleport, Niagara County, New York treating an average of 0.18 million gallons per day against a permitted design capacity of 0.7 MGD, serving about 1,940 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit NY0022331 (administratively continued), which expires in January 2020, with 13 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
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.
Key contacts
Decision-makers at Middleport STP.
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Nearby wastewater treatment plants in New York
Gasport · 4 mi away
0.05 MGD
Medina · 4 mi away
0.8 MGD
Lyndonville · 8 mi away
0.04 MGD
Lockport · 12 mi away
6.55 MGD
Olcott · 13 mi away
0.36 MGD
Akron · 14 mi away
0.27 MGD
Oakfield · 15 mi away
0.09 MGD
Albion · 16 mi away
0.77 MGD
Middleport STP: 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 March 2, 2025.