Mount Vernon WWTP
Mount Vernon, IN · Posey County · Publicly Owned Treatment Works
- Average flow
- 1.03 MGD
- Design flow
- 4.1 MGD
- NPDES permit
- IN0035696
- Effective
- Permit expires
- December 2030
- Population served
- 6,493
- CWNS 2022
Mount Vernon WWTP is a publicly owned wastewater treatment works in Mount Vernon, Posey County, Indiana treating an average of 1.03 million gallons per day against a permitted design capacity of 4.1 MGD, serving about 6,493 residents. Treatment on site includes clarifiers. It discharges under NPDES permit IN0035696 (effective), which expires in December 2030, with 84 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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Compliance snapshot (last 3 years)
- Total violations
- 84
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Mount Vernon WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Mount Vernon WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Indiana
Mount Vernon · 4 mi away
0.003 MGD
New Harmony · 14 mi away
0.05 MGD
Evansville · 16 mi away
10.6 MGD
Evansville · 19 mi away
9.8 MGD
Poseyville · 20 mi away
0.14 MGD
Owensville · 26 mi away
0.05 MGD
Haubstadt · 27 mi away
0.23 MGD
Fort Branch · 28 mi away
0.32 MGD
Mount Vernon WWTP: 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 March 2, 2025.