Mazon Stp, Village Of
Mazon, IL · Grundy County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- 0.24 MGD
- NPDES permit
- IL0040070
- Effective
- Permit expires
- February 2027
- Population served
- 772
- CWNS 2022
Mazon Stp, Village Of is a publicly owned wastewater treatment works in Mazon, Grundy County, Illinois treating an average of 0.05 million gallons per day against a permitted design capacity of 0.24 MGD, serving about 772 residents. Treatment on site includes aerated lagoons. It discharges under NPDES permit IL0040070 (effective), which expires in February 2027, with 3 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
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Mazon Stp, Village Of, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Mazon Stp, Village Of, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Verona · 5 mi away
0.03 MGD
Gardner · 7 mi away
0.11 MGD
Coal City · 8 mi away
0.79 MGD
Diamond · 9 mi away
0.37 MGD
South Wilmington · 9 mi away
0.13 MGD
Morris · 9 mi away
0.73 MGD
Braidwood · 10 mi away
0.77 MGD
Marseilles · 13 mi away
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Mazon 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 March 7, 2025.