Potosi Pws
Potosi, MO · Washington County · Publicly Owned Treatment Works
- Average flow
- 0.48 MGD
- Design flow
- —
- NPDES permit
- MO0099431
- Administratively continued
- Permit expires
- June 2023
- Population served
- 2,956
- CWNS 2022
Potosi Pws is a publicly owned wastewater treatment plant in Potosi, Washington County, Missouri treating an average of 0.48 million gallons per day, serving about 2,956 residents. Treatment on site includes biological treatment, other, biosolids aerobic digestion, disinfection, uv, screening. It discharges under NPDES permit MO0099431 (administratively continued), which expires in June 2023, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biological Treatment, Other
unit processBiosolids Aerobic Digestion
unit processDisinfection, UV
unit processScreening
unit processUnlock 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.
Key contacts
Decision-makers at Potosi Pws.
No verified contacts on file yet
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Nearby wastewater treatment plants in Missouri
Potosi · 4 mi away
0.05 MGD
Potosi · 4 mi away
0.09 MGD
Leadwood · 13 mi away
0.07 MGD
Caledonia · 13 mi away
—
Bonne Terre · 14 mi away
0.23 MGD
Bismarck · 16 mi away
0.08 MGD
Bonne Terre · 16 mi away
0.24 MGD
Desoto · 17 mi away
0.02 MGD
Potosi 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 14, 2024.