Mount Vernon Pws
North Highway 39, Mount Vernon, MO 65712 · Lawrence County · Publicly Owned Treatment Works
- Average flow
- 0.79 MGD
- Design flow
- —
- NPDES permit
- MO0022381
- Administratively continued
- 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 0.79 million gallons per day, serving about 6,500 residents. It discharges under NPDES permit MO0022381 (administratively continued), which expires in March 2023, with 7 recorded violations in the last three years.
Treatment technology
8 treatment structures and unit processes identified at Mount Vernon Pws.
Available with a free Klarifi account
See the full treatment train at Mount Vernon Pws: structures, unit processes and planned upgrades, with 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
0.21 MGD
Verona · 10 mi away
0.14 MGD
Aurora · 10 mi away
1.25 MGD
Marionville · 11 mi away
0.25 MGD
Billings · 14 mi away
0.1 MGD
Monett · 14 mi away
2.77 MGD
Pierce City · 15 mi away
—
Wentworth · 16 mi away
0.01 MGD
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 October 26, 2026; facility record last updated April 24, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms