Union Pws
Union, MO · Franklin County · Publicly Owned Treatment Works
- Average flow
- 0.65 MGD
- Design flow
- —
- NPDES permit
- MO0025283
- Administratively continued
- Permit expires
- June 2025
- Population served
- 11,931
- CWNS 2022
Union Pws is a publicly owned wastewater treatment plant in Union, Franklin County, Missouri treating an average of 0.65 million gallons per day, serving about 11,931 residents. Treatment on site includes uncovered lagoons, biological treatment, other, disinfection, uv, screening. It discharges under NPDES permit MO0025283 (administratively continued), which expires in June 2025, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Biological Treatment, Other
unit processDisinfection, UV
unit processScreening
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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 Union Pws.
No verified contacts on file yet
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Nearby wastewater treatment plants in Missouri
Union · 1 mi away
0.001 MGD
Union · 3 mi away
0.23 MGD
Union · 3 mi away
0.01 MGD
Washington · 5 mi away
0.009 MGD
Villa Ridge · 5 mi away
0.002 MGD
St. Clair · 5 mi away
0.44 MGD
Villa Ridge · 5 mi away
0.009 MGD
Washington · 6 mi away
0.006 MGD
Union Pws: 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 11, 2026.