Mansfield Wastewater Treatment Plant
Mansfield, OH · Richland County · Publicly Owned Treatment Works
- Average flow
- 6.67 MGD
- Design flow
- 24 MGD
- NPDES permit
- OH0026328
- Effective
- Permit expires
- March 2030
- Population served
- 53,150
- CWNS 2022
Mansfield Wastewater Treatment Plant is a publicly owned wastewater treatment works in Mansfield, Richland County, Ohio treating an average of 6.67 million gallons per day against a permitted design capacity of 24 MGD, serving about 53,150 residents. Treatment on site includes clarifiers, biogas silos, biogas balloons. It discharges under NPDES permit OH0026328 (effective), which expires in March 2030, with 428 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
- 428
- Effluent violations
- 28
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Mansfield 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 Mansfield Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Lucas · 5 mi away
0.07 MGD
Lexington · 7 mi away
0.47 MGD
Perrysville · 11 mi away
0.00037 MGD
Ashland · 11 mi away
0.0058 MGD
Butler · 11 mi away
0.25 MGD
Perrysville · 13 mi away
0.05 MGD
Ashland · 13 mi away
0.0095 MGD
Perrysville · 13 mi away
0.0022 MGD
Mansfield 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 April 24, 2025.