Olentangy Environmental Control Center
Powell, OH · Delaware County · Publicly Owned Treatment Works
- Average flow
- 3.41 MGD
- Design flow
- 6 MGD
- NPDES permit
- OH0054399
- Effective
- Permit expires
- July 2028
- Population served
- 41,894
- CWNS 2022
Olentangy Environmental Control Center is a publicly owned wastewater treatment plant in Powell, Delaware County, Ohio treating an average of 3.41 million gallons per day against a permitted design capacity of 6 MGD, serving about 41,894 residents. Treatment on site includes clarifiers, uncovered lagoons. It discharges under NPDES permit OH0054399 (effective), which expires in July 2028, with 49 recorded violations 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
- 49
- Effluent violations
- 25
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Olentangy Environmental Control Center, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Olentangy Environmental Control Center, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Powell · 5 mi away
0.02 MGD
Westerville · 7 mi away
0.56 MGD
Amlin · 9 mi away
0.0094 MGD
Dublin · 9 mi away
0.01 MGD
Galena · 10 mi away
0.0062 MGD
Delaware · 10 mi away
3.68 MGD
Sunbury · 11 mi away
0.68 MGD
Plain City · 11 mi away
0.0012 MGD
Olentangy Environmental Control 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 April 6, 2025.