Potosi Wastewater Treatment Plant #3
Potosi, MO · Washington County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- —
- NPDES permit
- MO0127566
- Effective
- Permit expires
- December 2029
- Population served
- 2,500
- CWNS 2022
Potosi Wastewater Treatment Plant #3 is a publicly owned wastewater treatment works in Potosi, Washington County, Missouri treating an average of 0.05 million gallons per day, serving about 2,500 residents. Treatment on site includes biological treatment, other, biosolids aerobic digestion, disinfection, uv. It discharges under NPDES permit MO0127566 (effective), which expires in December 2029, with 5 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 processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Potosi Wastewater Treatment Plant #3.
No verified contacts on file yet
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Nearby wastewater treatment plants in Missouri
Potosi · 1 mi away
0.09 MGD
Potosi · 4 mi away
0.48 MGD
Leadwood · 10 mi away
0.07 MGD
Bonne Terre · 10 mi away
0.23 MGD
Bonne Terre · 12 mi away
0.24 MGD
Caledonia · 12 mi away
—
Bismarck · 12 mi away
0.08 MGD
Bonne Terre · 13 mi away
1.14 MGD
Potosi Wastewater Treatment Plant #3: 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 February 27, 2025.