Johnsburg, Village Of
Johnsburg, IL · Mchenry County · Publicly Owned Treatment Works
- Average flow
- 0.03 MGD
- Design flow
- 1.62 MGD
- NPDES permit
- IL0074969
- Effective
- Permit expires
- July 2029
- Population served
- 5,974
- CWNS 2022
Johnsburg, Village Of is a publicly owned wastewater treatment plant in Johnsburg, Mchenry County, Illinois treating an average of 0.03 million gallons per day against a permitted design capacity of 1.62 MGD, serving about 5,974 residents. Treatment on site includes clarifiers. It discharges under NPDES permit IL0074969 (effective), which expires in July 2029, with 6 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
- 6
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Johnsburg, Village Of, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Johnsburg, Village Of, plus the full compliance history and discharge data.
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Spring Grove · 5 mi away
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Wonder Lake · 5 mi away
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Crystal Lake · 9 mi away
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Woodstock · 10 mi away
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Woodstock · 10 mi away
1.07 MGD
Hebron · 11 mi away
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Lakewood · 12 mi away
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Cary · 12 mi away
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Johnsburg, 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 May 18, 2025.