Neponset Stp, Village Of
Neponset, IL · Bureau County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- 0.43 MGD
- NPDES permit
- IL0076589
- Effective
- Permit expires
- March 2028
- Population served
- 471
- CWNS 2022
Neponset Stp, Village Of is a publicly owned wastewater treatment works in Neponset, Bureau County, Illinois treating an average of 0.05 million gallons per day against a permitted design capacity of 0.43 MGD, serving about 471 residents. Treatment on site includes aerated lagoons. It discharges under NPDES permit IL0076589 (effective), which expires in March 2028, with 20 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 20
- Effluent violations
- 18
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Neponset Stp, Village Of.
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Nearby wastewater treatment plants in Illinois
Sheffield · 6 mi away
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Buda · 6 mi away
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Kewanee · 7 mi away
1.71 MGD
Bradford · 10 mi away
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Annawan · 11 mi away
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Wyanet · 12 mi away
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Manlius · 13 mi away
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Toulon · 14 mi away
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Neponset 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 November 7, 2025.