Ottawa WWTP
Ottawa, OH · Putnam County · Publicly Owned Treatment Works
- Average flow
- 0.79 MGD
- Design flow
- 3 MGD
- NPDES permit
- OH0026921
- Effective
- Permit expires
- February 2030
- Population served
- 5,401
- CWNS 2022
Ottawa WWTP is a publicly owned wastewater treatment works in Ottawa, Putnam County, Ohio treating an average of 0.79 million gallons per day against a permitted design capacity of 3 MGD, serving about 5,401 residents. Treatment on site includes clarifiers, aerated lagoons, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit OH0026921 (effective), which expires in February 2030, with 15 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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Carrousels / oxidation ditches
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Compliance snapshot (last 3 years)
- Total violations
- 15
- Effluent violations
- 7
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Ottawa WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Ottawa WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Pandora · 6 mi away
0.19 MGD
Miller City · 6 mi away
0.0067 MGD
Leipsic · 7 mi away
0.84 MGD
Ottawa · 8 mi away
0.01 MGD
Kalida · 9 mi away
0.11 MGD
Columbus Grove · 12 mi away
0.19 MGD
Bluffton · 13 mi away
0.44 MGD
Continental · 13 mi away
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Ottawa 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 19, 2026.