O Fallon STP
O Fallon, IL · St Clair County · Publicly Owned Treatment Works
- Average flow
- 2.64 MGD
- Design flow
- 14.6 MGD
- NPDES permit
- 3604871892
- Effective
- Permit expires
- March 2031
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in O Fallon
| Project | Budget | Years |
|---|---|---|
| South Cherry Street Rehabilitation | $4,000,000 | 2027–2027 |
| Watermain Replacement Program | $3,200,000 | 2026–2030 |
| Hickory and Walnut Street Rehabilitation | $3,150,000 | 2027–2028 |
| South Trunk Main Replacement Phase 3 | $2,100,000 | 2027–2028 |
| North Trunk Main Replacement Phase 2 | $2,100,000 | 2029–2030 |
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
21 verified contacts for O Fallon STP, with validated emails and direct phone numbers.
Unlock 21 verified contacts
Names, validated emails and direct phone numbers for decision-makers at O Fallon STP — plus full compliance history and discharge data.
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Data sourced from public EPA / NPDES records and Klarifi analysis. Last updated December 2024.