Union Pws
Highway O, Union, MO 63084 · Franklin County · Publicly Owned Treatment Works
- Average flow
- 1.05 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 1.05 million gallons per day, serving about 11,931 residents. It discharges under NPDES permit MO0025283 (administratively continued), which expires in June 2025, with 0 recorded violations in the last three years.
Treatment technology
4 treatment structures and unit processes identified at Union Pws.
Available with a free Klarifi account
See the full treatment train at Union Pws: structures, unit processes and planned upgrades, with exact unit counts.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Union Pws in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 2
- latest Feb 2025
No formal federal enforcement case is on record for this plant.
Full case history with a free Klarifi account
Every action against Union Pws with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
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
0.0017 MGD
Union · 3 mi away
0.33 MGD
Union · 3 mi away
0.02 MGD
Washington · 5 mi away
0.0093 MGD
Villa Ridge · 5 mi away
0.002 MGD
St. Clair · 5 mi away
0.75 MGD
Villa Ridge · 5 mi away
—
Villa Ridge · 6 mi away
0.03 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 October 12, 2026; facility record last updated August 11, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms