Montpelier WWTP
Montpelier, OH · Williams County · Publicly Owned Treatment Works
- Average flow
- 0.53 MGD
- Design flow
- 1 MGD
- NPDES permit
- OH0021831
- Effective
- Permit expires
- November 2027
- Population served
- 4,099
- CWNS 2022
Montpelier WWTP is a publicly owned wastewater treatment works in Montpelier, Williams County, Ohio treating an average of 0.53 million gallons per day against a permitted design capacity of 1 MGD, serving about 4,099 residents. Treatment on site includes clarifiers, uncovered lagoons, biogas balloons. It discharges under NPDES permit OH0021831 (effective), which expires in November 2027, with 1 recorded violation 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
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Montpelier WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Montpelier WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Bryan · 6 mi away
0.02 MGD
Pioneer · 7 mi away
0.00036 MGD
Bryan · 7 mi away
0.02 MGD
Edon · 7 mi away
0.04 MGD
Pioneer · 8 mi away
—
Pioneer · 8 mi away
0.23 MGD
Bryan · 10 mi away
0.84 MGD
Bryan · 10 mi away
0.01 MGD
Montpelier 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 August 7, 2026.