Village Of Mokena Stw
Mokena, IL · Will County · Publicly Owned Treatment Works
- Average flow
- 1.84 MGD
- Design flow
- —
- NPDES permit
- ILL024201
- Effective
- Permit expires
- December 2030
- Population served
- 20,050
- CWNS 2022
Village Of Mokena Stw is a publicly owned wastewater treatment plant in Mokena, Will County, Illinois treating an average of 1.84 million gallons per day, serving about 20,050 residents. Treatment on site includes clarifiers. It discharges under NPDES permit ILL024201 (effective), which expires in December 2030, with 2 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
15 verified contacts for Village Of Mokena Stw, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Village Of Mokena Stw, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Frankfort · 3 mi away
3.32 MGD
New Lenox · 4 mi away
0.15 MGD
New Lenox · 4 mi away
1.46 MGD
New Lenox · 7 mi away
0.84 MGD
Joliet · 8 mi away
0.11 MGD
Lockport · 9 mi away
—
Manhattan · 10 mi away
0.81 MGD
Crest Hill · 10 mi away
1.19 MGD
Village Of Mokena Stw: 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 May 17, 2025.