Wenona Municipal Sewage Treatment Facility
Wenona, IL · Marshall County · Publicly Owned Treatment Works
- Average flow
- 0.14 MGD
- Design flow
- 0.48 MGD
- NPDES permit
- IL0021792
- Effective
- Permit expires
- August 2029
- Population served
- 1,103
- CWNS 2022
Wenona Municipal Sewage Treatment Facility is a publicly owned wastewater treatment works in Wenona, Marshall County, Illinois treating an average of 0.14 million gallons per day against a permitted design capacity of 0.48 MGD, serving about 1,103 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit IL0021792 (effective), which expires in August 2029, with 51 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 51
- Effluent violations
- 21
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Wenona Municipal Sewage Treatment Facility, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Wenona Municipal Sewage Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Lostant · 5 mi away
0.02 MGD
Minonk · 10 mi away
0.3 MGD
Tonica · 11 mi away
0.05 MGD
Mcnabb · 11 mi away
0.03 MGD
Streator · 12 mi away
1.37 MGD
Cedar Point · 14 mi away
0.02 MGD
Henry · 15 mi away
0.29 MGD
Washburn · 16 mi away
0.07 MGD
Wenona Municipal Sewage Treatment Facility: 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 28, 2025.