Lake In The Hills Sd
Lake In The Hills, IL · Mchenry County · Publicly Owned Treatment Works
- Average flow
- 2.19 MGD
- Design flow
- —
- NPDES permit
- ILL021733
- Effective
- Permit expires
- December 2030
- Population served
- 28,982
- CWNS 2022
Lake In The Hills Sd is a publicly owned wastewater treatment plant in Lake In The Hills, Mchenry County, Illinois treating an average of 2.19 million gallons per day, serving about 28,982 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit ILL021733 (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.
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
2 verified contacts for Lake In The Hills Sd, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Lake In The Hills Sd, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Illinois
Algonquin · 3 mi away
2.3 MGD
Cary · 4 mi away
1.38 MGD
Crystal Lake · 4 mi away
0.43 MGD
Lakewood · 5 mi away
0.29 MGD
Huntley · 6 mi away
0.82 MGD
Huntley · 7 mi away
0.69 MGD
East Dundee · 7 mi away
0.81 MGD
Woodstock · 9 mi away
1.07 MGD
Lake In The Hills Sd: 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 September 11, 2026.