Marysville WRF
Marysville, OH · Union County · Publicly Owned Treatment Works
- Average flow
- 3.83 MGD
- Design flow
- 8 MGD
- NPDES permit
- OH0136271
- Effective
- Permit expires
- June 2028
- Population served
- 26,558
- CWNS 2022
Marysville WRF is a publicly owned wastewater treatment works in Marysville, Union County, Ohio treating an average of 3.83 million gallons per day against a permitted design capacity of 8 MGD, serving about 26,558 residents. Treatment on site includes clarifiers, aerated lagoons. It discharges under NPDES permit OH0136271 (effective), which expires in June 2028, with 7 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
- 7
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
4 verified contacts for Marysville WRF, with validated emails and direct phone numbers.
Unlock 4 verified contacts (1 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Marysville WRF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Marysville · 3 mi away
0.02 MGD
Marysville · 3 mi away
0.005 MGD
Plain City · 4 mi away
0.0012 MGD
Ostrander · 5 mi away
0.04 MGD
Plain City · 6 mi away
0.7 MGD
Milford Center · 7 mi away
0.0059 MGD
Powell · 8 mi away
0.02 MGD
Marysville · 8 mi away
0.0091 MGD
Marysville WRF: 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 August 4, 2026.