Williamsville Pws
Williamsville, MO · Wayne County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- —
- NPDES permit
- MO0090654
- Administratively continued
- Permit expires
- March 2025
- Population served
- 336
- CWNS 2022
Williamsville Pws is a publicly owned wastewater treatment plant in Williamsville, Wayne County, Missouri treating an average of 0.05 million gallons per day, serving about 336 residents. Treatment on site includes disinfection, uv, flow equalization, lagoon, aerobic, lagoon, anaerobic. It discharges under NPDES permit MO0090654 (administratively continued), which expires in March 2025, with 42 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Disinfection, UV
unit processFlow Equalization
unit processLagoon, Aerobic
unit processLagoon, Anaerobic
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 42
- Effluent violations
- 42
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Williamsville Pws.
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Williamsville 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 September 6, 2024.