Fenwick Marina
Oak Harbor, OH · Ottawa County · Publicly Owned Treatment Works
- Average flow
- 0.0061 MGD
- Design flow
- —
- NPDES permit
- OH0125784
- Effective
- Permit expires
- October 2026
- Population served
- —
- CWNS 2022
Fenwick Marina is a publicly owned wastewater treatment plant in Oak Harbor, Ottawa County, Ohio treating an average of 0.0061 million gallons per day. Treatment on site includes uncovered lagoons. It discharges under NPDES permit OH0125784 (effective), which expires in October 2026, with 25 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 25
- Effluent violations
- 25
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Fenwick Marina.
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Oak Harbor · 6 mi away
0.42 MGD
Oak Harbor · 6 mi away
0.0066 MGD
Port Clinton · 9 mi away
1.15 MGD
Elmore · 12 mi away
0.07 MGD
Lindsey · 13 mi away
0.02 MGD
Port Clinton · 13 mi away
0.45 MGD
Genoa · 14 mi away
0.24 MGD
Port Clinton · 15 mi away
0.76 MGD
Fenwick Marina: 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 5, 2025.