Mount Vernon Pws
Mount Vernon, MO · Lawrence County · Publicly Owned Treatment Works
- Average flow
- 0.59 MGD
- Design flow
- —
- NPDES permit
- MO0022381
- Effective
- Permit expires
- March 2023
- Population served
- 6,500
- CWNS 2022
Mount Vernon Pws is a publicly owned wastewater treatment plant in Mount Vernon, Lawrence County, Missouri treating an average of 0.59 million gallons per day, serving about 6,500 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches, biological treatment, other, biosolids aerobic digestion and other unit processes. It discharges under NPDES permit MO0022381 (effective), which expires in March 2023, with 7 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Uncovered lagoons
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Carrousels / oxidation ditches
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Biological Treatment, Other
unit processBiosolids Aerobic Digestion
unit processDisinfection, UV
unit processFlow Equalization
unit processScreening
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 7
- 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 Mount Vernon Pws.
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Nearby wastewater treatment plants in Missouri
Miller · 7 mi away
0.17 MGD
Verona · 10 mi away
0.09 MGD
Aurora · 10 mi away
0.79 MGD
Marionville · 11 mi away
0.31 MGD
Billings · 14 mi away
0.06 MGD
Monett · 14 mi away
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Pierce City · 15 mi away
0.25 MGD
Wentworth · 16 mi away
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Mount Vernon 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 April 24, 2025.