Wentzville Pws
Wentzville, MO · St Charles County · Publicly Owned Treatment Works
- Average flow
- 4.34 MGD
- Design flow
- —
- NPDES permit
- MO0093599
- Administratively continued
- Permit expires
- March 2024
- Population served
- 41,342
- CWNS 2022
Wentzville Pws is a publicly owned wastewater treatment plant in Wentzville, St Charles County, Missouri treating an average of 4.34 million gallons per day, serving about 41,342 residents. Treatment on site includes clarifiers, biological treatment, other, biosolids aerobic digestion, flow equalization, screening. It discharges under NPDES permit MO0093599 (administratively continued), which expires in March 2024, with 4 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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Biological Treatment, Other
unit processBiosolids Aerobic Digestion
unit processFlow Equalization
unit processScreening
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Wentzville
Wentzville's capital improvement plan lists 57 water, sewer and wastewater line items worth $54M starting 2025–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Wentzville →
| Project | Budget | Years |
|---|---|---|
| Waterline Extensions and Replacement | $13,450,000 | 2025–2028 |
| Deep Aquifer Water Well and Storage | $12,000,000 | 2025–2026 |
| New Water Storage Tank with Water Main Improvements | $9,000,000 | 2025–2026 |
| 2-MG GM Ground Storage Tank Coating Interior and Booster Pump Rebuild | $3,400,000 | 2025–2026 |
| Bypass Trunk Relief | $2,300,000 | 2025–2026 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
2 verified contacts for Wentzville Pws, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Wentzville Pws, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Missouri
Moscow Mills · 5 mi away
0.25 MGD
Wentzville · 5 mi away
0.0093 MGD
Foristell · 6 mi away
0.01 MGD
Wentzville · 6 mi away
0.03 MGD
O'Fallon · 7 mi away
0.1 MGD
Old Monroe · 7 mi away
0.05 MGD
Moscow Mills · 8 mi away
0.002 MGD
Troy · 8 mi away
1.16 MGD
Wentzville 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 August 3, 2026.