Millersport STP
Millersport, OH · Fairfield County · Publicly Owned Treatment Works
- Average flow
- 0.1 MGD
- Design flow
- 0.3 MGD
- NPDES permit
- OH0026531
- Effective
- Permit expires
- November 2027
- Population served
- 978
- CWNS 2022
Millersport STP is a publicly owned wastewater treatment works in Millersport, Fairfield County, Ohio treating an average of 0.1 million gallons per day against a permitted design capacity of 0.3 MGD, serving about 978 residents. It discharges under NPDES permit OH0026531 (effective), which expires in November 2027, with 3 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Millersport STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Ohio
Buckeye Lake · 3 mi away
0.52 MGD
Kirkersville · 5 mi away
0.04 MGD
Hebron · 5 mi away
1.87 MGD
Baltimore · 6 mi away
0.12 MGD
Thornville · 6 mi away
0.11 MGD
Hebron · 6 mi away
0.44 MGD
Heath · 7 mi away
0.0098 MGD
Baltimore · 7 mi away
0.33 MGD
Millersport 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 May 24, 2025.