Smithton Stp, Village Of
Smithton, IL · St. Clair County · Publicly Owned Treatment Works
- Average flow
- 0.45 MGD
- Design flow
- 2.85 MGD
- NPDES permit
- IL0020834
- Effective
- Permit expires
- August 2030
- Population served
- 3,684
- CWNS 2022
Smithton Stp, Village Of is a publicly owned wastewater treatment works in Smithton, St. Clair County, Illinois treating an average of 0.45 million gallons per day against a permitted design capacity of 2.85 MGD, serving about 3,684 residents. Treatment on site includes covered lagoons. It discharges under NPDES permit IL0020834 (effective), which expires in August 2030, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Covered lagoons
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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.
Key contacts
Decision-makers at Smithton Stp, Village Of.
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Freeburg · 4 mi away
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Belleville · 6 mi away
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Millstadt · 7 mi away
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Belleville · 7 mi away
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Hecker · 7 mi away
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Swansea · 8 mi away
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Waterloo · 9 mi away
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Smithton Stp, Village Of: 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 7, 2025.