Plain City WWTP
Plain City, OH · Madison County · Publicly Owned Treatment Works
- Average flow
- 0.7 MGD
- Design flow
- 1.25 MGD
- NPDES permit
- OH0027057
- Effective
- Permit expires
- September 2027
- Population served
- 4,167
- CWNS 2022
Plain City WWTP is a publicly owned wastewater treatment works in Plain City, Madison County, Ohio treating an average of 0.7 million gallons per day against a permitted design capacity of 1.25 MGD, serving about 4,167 residents. It discharges under NPDES permit OH0027057 (effective), which expires in September 2027, with 158 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
- 158
- Effluent violations
- 158
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Plain City WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Ohio
Plain City · 2 mi away
0.0012 MGD
Plain City · 3 mi away
0.0082 MGD
Dublin · 4 mi away
0.01 MGD
Marysville · 5 mi away
0.005 MGD
Marysville · 6 mi away
3.83 MGD
Amlin · 6 mi away
0.0094 MGD
Milford Center · 8 mi away
0.0059 MGD
Powell · 9 mi away
0.02 MGD
Plain City WWTP: 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 23, 2025.