Earnhart Hill Regional W & Sd WWTP #2
Circleville, OH · Pickaway County · Publicly Owned Treatment Works
- Average flow
- 0.19 MGD
- Design flow
- 0.3 MGD
- NPDES permit
- OH0121371
- Effective
- Permit expires
- October 2029
- Population served
- 715
- CWNS 2022
Earnhart Hill Regional W & Sd WWTP #2 is a publicly owned wastewater treatment works in Circleville, Pickaway County, Ohio treating an average of 0.19 million gallons per day against a permitted design capacity of 0.3 MGD, serving about 715 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches, cooling towers. It discharges under NPDES permit OH0121371 (effective), which expires in October 2029, with 0 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
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Earnhart Hill Regional W & Sd WWTP #2.
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Nearby wastewater treatment plants in Ohio
Kingston · 3 mi away
0.06 MGD
Circleville · 6 mi away
0.0044 MGD
Circleville · 6 mi away
1.17 MGD
Chillicothe · 7 mi away
0.0003 MGD
Circleville · 8 mi away
0.0056 MGD
Williamsport · 9 mi away
0.12 MGD
Circleville · 9 mi away
0.0064 MGD
Clarksburg · 9 mi away
0.03 MGD
Earnhart Hill Regional W & Sd WWTP #2: 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 January 25, 2025.