Mill Creek Estates WWTP
Marysville, OH · Union County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- 0.11 MGD
- NPDES permit
- OH0070815
- Effective
- Permit expires
- February 2027
- Population served
- 1,083
- CWNS 2022
Mill Creek Estates WWTP is a publicly owned wastewater treatment works in Marysville, Union County, Ohio treating an average of 0.02 million gallons per day against a permitted design capacity of 0.11 MGD, serving about 1,083 residents. It discharges under NPDES permit OH0070815 (effective), which expires in February 2027, with 0 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
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Mill Creek Estates WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Ohio
Marysville · 3 mi away
3.83 MGD
Marysville · 5 mi away
0.0091 MGD
Marysville · 5 mi away
0.005 MGD
Ostrander · 5 mi away
0.04 MGD
Plain City · 7 mi away
0.0012 MGD
Milford Center · 7 mi away
0.0059 MGD
Plain City · 9 mi away
0.7 MGD
Powell · 10 mi away
0.02 MGD
Mill Creek Estates 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 September 30, 2025.