Upper Olentangy Water Reclamation Center
Delaware, OH · Delaware County · Publicly Owned Treatment Works
- Average flow
- 3.68 MGD
- Design flow
- 10 MGD
- NPDES permit
- OH0024911
- Effective
- Permit expires
- March 2028
- Population served
- 44,776
- CWNS 2022
Upper Olentangy Water Reclamation Center is a publicly owned wastewater treatment works in Delaware, Delaware County, Ohio treating an average of 3.68 million gallons per day against a permitted design capacity of 10 MGD, serving about 44,776 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit OH0024911 (effective), which expires in March 2028, with 2 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
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Delaware
Delaware's capital improvement plan lists 50 water, sewer and wastewater line items worth $92M starting 2025–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Delaware →
| Project | Budget | Years |
|---|---|---|
| Upground Reservoir | $39,000,000 | 2026–2029 |
| Northeast Olentangy Interceptor | $25,000,000 | 2027–2027 |
| South Industrial Loop Sewer | $5,000,000 | 2025–2025 |
| US 42 Sewer Extension | $2,600,000 | 2025–2025 |
| South Industrial Loop Watermain | $2,100,000 | 2025–2025 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
Decision-makers at Upper Olentangy Water Reclamation Center.
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Nearby wastewater treatment plants in Ohio
Ostrander · 8 mi away
0.04 MGD
Powell · 8 mi away
0.02 MGD
Ashley · 9 mi away
0.09 MGD
Powell · 10 mi away
3.41 MGD
Sunbury · 11 mi away
0.68 MGD
Prospect · 12 mi away
0.05 MGD
Galena · 13 mi away
0.0062 MGD
Marysville · 13 mi away
3.83 MGD
Upper Olentangy Water Reclamation Center: 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 May 24, 2025.