Middletown Wastewater Treatment Plant
Middletown, OH · Butler County · Publicly Owned Treatment Works
- Average flow
- 11.69 MGD
- Design flow
- 26 MGD
- NPDES permit
- OH0026522
- Effective
- Permit expires
- December 2026
- Population served
- 51,033
- CWNS 2022
Middletown Wastewater Treatment Plant is a publicly owned wastewater treatment works in Middletown, Butler County, Ohio treating an average of 11.69 million gallons per day against a permitted design capacity of 26 MGD, serving about 51,033 residents. Treatment on site includes clarifiers, biogas silos, biogas balloons. It discharges under NPDES permit OH0026522 (effective), which expires in December 2026, with 82 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
- 82
- Effluent violations
- 14
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Middletown Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Middletown Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Hamilton · 3 mi away
7.64 MGD
Hamilton · 5 mi away
0.0014 MGD
Hamilton · 5 mi away
0.0087 MGD
New Miami · 7 mi away
0.16 MGD
Hamilton · 11 mi away
5.26 MGD
Fairfield · 11 mi away
3.88 MGD
Mason · 11 mi away
5.56 MGD
Springboro · 11 mi away
1.58 MGD
Middletown Wastewater Treatment Plant: 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 5, 2025.