What is the address of Lake In The Hills Sd?

The address on the plant’s EPA facility record is 515 Plum Street, Lake In The Hills, IL 60156, in Mchenry County. Its coordinates are 42.1898, -88.3132. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Lake In The Hills Sd treat?

Lake In The Hills Sd treats an average of 2.56 MGD.

What treatment technology does Lake In The Hills Sd use?

Klarifi has identified 2 treatment structures and unit processes at the Lake In The Hills facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Lake In The Hills Sd?

The facility discharges under NPDES permit ILL021733, currently effective, expiring December 2030.

Is Lake In The Hills Sd in compliance?

Discharge monitoring reports show 2 violations at Lake In The Hills Sd in the last three years, 2 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Lake In The Hills Sd and how do I contact them?

Lake In The Hills Sd is a publicly owned treatment works in Lake In The Hills, Illinois. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Lake In The Hills Sd

515 Plum Street, Lake In The Hills, IL 60156 · Mchenry County · Publicly Owned Treatment Works

Average flow: 2.56 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 2.56 million gallons per day, serving about 28,982 residents. It discharges under NPDES permit ILL021733 (effective), which expires in December 2030, with 2 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Lake In The Hills Sd.

Available with a free Klarifi account

See the full treatment train at Lake In The Hills Sd: structures, unit processes and planned upgrades, with exact unit counts.

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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

2 verified contacts for Lake In The Hills Sd, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Lake In The Hills Sd, plus the full compliance history and discharge data.

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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 October 5, 2026; facility record last updated September 11, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms

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