Flat Branch WWTP
11046 Twp Rd 157, East Liberty, OH 43319 · Logan County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- 0.1 MGD
- NPDES permit
- OH0047953
- Effective
- Permit expires
- June 2027
- Population served
- 766
- CWNS 2022
Flat Branch WWTP is a publicly owned wastewater treatment works in East Liberty, Logan County, Ohio treating an average of 0.05 million gallons per day against a permitted design capacity of 0.1 MGD, serving about 766 residents. It discharges under NPDES permit OH0047953 (effective), which expires in June 2027, with 5 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Flat Branch WWTP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Flat Branch WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Ohio
N Lewisburg · 3 mi away
0.14 MGD
Bellefontaine · 8 mi away
0.0049 MGD
Bellefontaine · 10 mi away
0.0012 MGD
Marysville · 11 mi away
0.01 MGD
West Liberty · 11 mi away
0.26 MGD
Milford Center · 12 mi away
0.0049 MGD
Bellefontaine · 13 mi away
2.68 MGD
Marysville · 14 mi away
0.06 MGD
Flat Branch 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 October 26, 2026; facility record last updated September 29, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms