Minonk Stw, City Of
North Oak Street, Minonk, IL 61760 · Woodford County · Publicly Owned Treatment Works
- Average flow
- 0.7 MGD
- Design flow
- 0.85 MGD
- NPDES permit
- IL0037818
- Administratively continued
- Permit expires
- June 2026
- Population served
- 2,409
- CWNS 2022
Minonk Stw, City Of is a publicly owned wastewater treatment plant in Minonk, Woodford County, Illinois treating an average of 0.7 million gallons per day against a permitted design capacity of 0.85 MGD, serving about 2,409 residents. It discharges under NPDES permit IL0037818 (administratively continued), which expires in June 2026, with 0 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Minonk Stw, City Of.
Available with a free Klarifi account
See the full treatment train at Minonk Stw, City Of: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Minonk Stw, City Of.
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Nearby wastewater treatment plants in Illinois
Flanagan · 10 mi away
0.08 MGD
Wenona · 10 mi away
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El Paso · 11 mi away
0.44 MGD
Roanoke · 11 mi away
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Washburn · 14 mi away
0.09 MGD
Gridley · 15 mi away
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Lostant · 16 mi away
0.03 MGD
Streator · 18 mi away
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Minonk Stw, City 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 October 5, 2026; facility record last updated November 7, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms