Union City WWTP
Union City, OH · Darke County · Publicly Owned Treatment Works
- Average flow
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- Design flow
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- NPDES permit
- OH0022454
- Expired
- Permit expires
- March 2026
- Population served
- 4,410
- CWNS 2022
Union City WWTP is a publicly owned wastewater treatment works in Union City, Darke County, Ohio, serving about 4,410 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit OH0022454 (expired), which expires in March 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.
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
1 verified contact for Union City WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Union City WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Ohio
Ansonia · 8 mi away
0.05 MGD
Greenville · 9 mi away
0.0076 MGD
Greenville · 11 mi away
1.19 MGD
Versailles · 15 mi away
0.36 MGD
Ft Recovery · 15 mi away
0.09 MGD
New Madison · 16 mi away
0.08 MGD
St Henry · 18 mi away
0.09 MGD
Celina · 19 mi away
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Union City 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 September 11, 2026; facility record last updated August 14, 2026.