Defiance Water Pollution Control Plant
Defiance, OH · Defiance County · Publicly Owned Treatment Works
- Average flow
- 2.07 MGD
- Design flow
- 12 MGD
- NPDES permit
- OH0024899
- Effective
- Permit expires
- February 2029
- Population served
- 19,733
- CWNS 2022
Defiance Water Pollution Control Plant is a publicly owned wastewater treatment works in Defiance, Defiance County, Ohio treating an average of 2.07 million gallons per day against a permitted design capacity of 12 MGD, serving about 19,733 residents. Treatment on site includes clarifiers, aerated lagoons, uncovered lagoons, biogas balloons. It discharges under NPDES permit OH0024899 (effective), which expires in February 2029, with 30 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Aerated lagoons
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Uncovered lagoons
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Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 30
- Effluent violations
- 18
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Defiance Water Pollution Control Plant, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Defiance Water Pollution Control Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Defiance · 6 mi away
0.001 MGD
Holgate · 9 mi away
—
Evansport · 10 mi away
0.02 MGD
Sherwood · 12 mi away
—
Continental · 12 mi away
—
Napoleon · 13 mi away
1.08 MGD
Oakwood · 15 mi away
—
Archbold · 15 mi away
1.42 MGD
Defiance Water Pollution Control 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 March 16, 2025.