Lake in the Hills

ZipCheckup's reading of EPA SDWIS for Lake in the Hills (IL1110400): 2 EPA violations in the last five years. The five-year EPA compliance file for Lake in the Hills contains 2 violations, each documented and subsequently closed - the utility now operates in full compliance and continues to supply approximately 28,661 residents with water meeting current federal standards, including both health-based and monitoring requirements.

Data: EPA SDWIS

System Overview

Lake in the Hills (EPA ID: IL1110400) is a community water system in Illinois that serves approximately 28,661 people from groundwater sources.

This system provides water to 5 ZIP codes across 5 communities.

ZIP-Area Home Safety Context: B (82/100)

This is the average Home Safety Score for 1 of 5 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.

Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.

Violation History

Status breakdown for accepted records with record years 2021-2026: 0 resolved, 2 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.

Recent Violations

Contaminants Detected

The following contaminants have been flagged in EPA records for this water system:

Lead & Copper

EPA Lead and Copper Rule evidence attributed directly to this water system:

The accepted LCR snapshot contains 1 reported copper action-level exceedance record for this PWSID. The source does not provide a verified copper level for publication.

Radon Risk in Service Area

Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)

The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.

ZIP Codes Served

Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by IL or modeled from parcel and building-footprint data.

• 60014 - Crystal Lake
• 60098 - Woodstock
• 60102 - Algonquin
• 60142 - Huntley
• 60156 - Lake In The Hills

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Lake in the Hills (IL1110400) on EPA.gov.

Frequently Asked Questions

Is Lake in the Hills water safe to drink?

The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Lake in the Hills; its 2 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.

How many people does Lake in the Hills serve?

Lake in the Hills serves approximately 28,661 people across 5 ZIP codes in Illinois.

Where does Lake in the Hills get its water?

The primary water source is groundwater.

@misc{zipcheckup-water-system-il1110400,
  author = {{ZipCheckup}},
  title  = {{Lake in the Hills (IL): 2 EPA Violations}},
  year   = {n.d.},
  url    = {https://zipcheckup.com/water-system/il1110400/}
}