New Windsor Stp, Village Of
New Windsor, IL · Mercer County · Publicly Owned Treatment Works
- Average flow
- 0.009 MGD
- Design flow
- 0.38 MGD
- NPDES permit
- IL0079162
- Effective
- Permit expires
- March 2027
- Population served
- —
- CWNS 2022
New Windsor Stp, Village Of is a publicly owned wastewater treatment works in New Windsor, Mercer County, Illinois treating an average of 0.009 million gallons per day against a permitted design capacity of 0.38 MGD. Treatment on site includes covered lagoons. It discharges under NPDES permit IL0079162 (effective), which expires in March 2027, with 97 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
- 97
- Effluent violations
- 27
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at New Windsor Stp, Village Of.
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Nearby wastewater treatment plants in Illinois
Alpha · 3 mi away
0.005 MGD
Viola · 7 mi away
0.03 MGD
Woodhull · 8 mi away
0.09 MGD
Sherrard · 8 mi away
0.05 MGD
Matherville · 9 mi away
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Orion · 11 mi away
0.3 MGD
Alexis · 12 mi away
0.04 MGD
Cambridge · 14 mi away
0.37 MGD
New Windsor 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 August 19, 2026.