Union WWTP
120 North Randolph Street, Union, OH 45322 · Montgomery County · Publicly Owned Treatment Works
- Average flow
- 0.94 MGD
- Design flow
- 1 MGD
- NPDES permit
- OH0021644
- Effective
- Permit expires
- May 2029
- Population served
- 6,329
- CWNS 2022
Union WWTP is a publicly owned wastewater treatment works in Union, Montgomery County, Ohio treating an average of 0.94 million gallons per day against a permitted design capacity of 1 MGD, serving about 6,329 residents. It discharges under NPDES permit OH0021644 (effective), which expires in May 2029, with 100 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Union WWTP.
Available with a free Klarifi account
See the full treatment train at Union WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 100
- 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 Union WWTP.
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Nearby wastewater treatment plants in Ohio
Englewood · 3 mi away
2.46 MGD
West Milton · 4 mi away
0.72 MGD
Brookville · 8 mi away
1.07 MGD
Laura · 8 mi away
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Dayton · 10 mi away
11.24 MGD
Troy · 10 mi away
5.28 MGD
Pleasant Hill · 11 mi away
0.06 MGD
New Lebanon · 11 mi away
0.51 MGD
Union 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 16, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms