St Mary Sew Treatmnt Fac
St Mary, MO · Ste. Genevieve County · Publicly Owned Treatment Works
- Average flow
- 0.02 MGD
- Design flow
- —
- NPDES permit
- MO0100731
- Administratively continued
- Permit expires
- March 2024
- Population served
- 1,015
- CWNS 2022
St Mary Sew Treatmnt Fac is a publicly owned wastewater treatment plant in St Mary, Ste. Genevieve County, Missouri treating an average of 0.02 million gallons per day, serving about 1,015 residents. Treatment on site includes biological treatment, other, biosolids aerobic digestion, disinfection, uv. It discharges under NPDES permit MO0100731 (administratively continued), which expires in March 2024, with 16 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
- 16
- 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 St Mary Sew Treatmnt Fac.
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Nearby wastewater treatment plants in Missouri
Perryville · 12 mi away
0.9 MGD
Ste. Genevieve · 16 mi away
0.04 MGD
Bloomsdale · 17 mi away
0.06 MGD
Altenburg · 25 mi away
0.02 MGD
Farmington · 26 mi away
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Crystal City · 28 mi away
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Oak Ridge · 28 mi away
0.01 MGD
Farmington · 28 mi away
0.98 MGD
St Mary Sew Treatmnt Fac: 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.