Thomson Stp, Village Of
Thomson, IL · Carroll County · Publicly Owned Treatment Works
- Average flow
- 0.24 MGD
- Design flow
- 2.64 MGD
- NPDES permit
- IL0073890
- Effective
- Permit expires
- March 2028
- Population served
- —
- CWNS 2022
Thomson Stp, Village Of is a publicly owned wastewater treatment works in Thomson, Carroll County, Illinois treating an average of 0.24 million gallons per day against a permitted design capacity of 2.64 MGD. Treatment on site includes biogas balloons. It discharges under NPDES permit IL0073890 (effective), which expires in March 2028, with 19 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 19
- Effluent violations
- 19
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Thomson Stp, Village Of.
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Nearby wastewater treatment plants in Illinois
Fulton · 8 mi away
0.42 MGD
Mt. Carroll · 11 mi away
0.12 MGD
Chadwick · 12 mi away
0.04 MGD
Albany · 13 mi away
0.04 MGD
Lanark · 17 mi away
0.31 MGD
Milledgeville · 18 mi away
0.09 MGD
Savanna · 19 mi away
0.02 MGD
Hanover · 21 mi away
0.09 MGD
Thomson 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 5, 2025.