PlainEnviro

MCHENRY

PWSID: IL1110600 · Mchenry, IL · Serves 22,335 people

Health Violations

MCHENRY has 1 health-based violation out of 1 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.

Population Served
22,335
Total Violations
1
Health Violations
1
Source Type
Groundwater

MCHENRY (PWSID IL1110600) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 22,335 people in Mchenry, IL, and is subject to primacy enforcement by the Illinois drinking-water program.

The system's federal compliance record contains 1 total violation, with 1 classified as health-based (MCL exceedances or treatment-technique failures). 1 distinct contaminant has been cited, including Combined Radium 226/228. Recorded violations span 1992–1992.

A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Illinois state drinking-water program's public portal.

System Details

EPA ID (PWSID)
IL1110600
System Type
CWS
Water Source
Groundwater
Location
Mchenry, IL
Population Served
22,335
Health Violations
Yes (1)

What contaminants are in this water system?

Contaminant Violations Health-Based
Combined Radium 226/228 1 1

Violation History (1)

Contaminant Health Date
Combined Radium 226/228 Yes Apr 2, 1992

Frequently Asked Questions

Is MCHENRY water safe to drink?
MCHENRY has 1 health-based violation out of 1 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed. The system uses groundwater water as its source.
How many people does MCHENRY serve?
MCHENRY serves 22,335 people in Mchenry, IL. It is classified as a CWS water system.
What violations does MCHENRY have?
MCHENRY has 1 total violation on record spanning 1992–1992. 1 are health-based violations involving contaminants exceeding EPA limits.
What contaminants have been found in MCHENRY water?
Violations have been recorded for 1 contaminant. The most frequent: Combined Radium 226/228.

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Explore More

Illinois Water Systems → All States → Contaminants →

About This Data

Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

Read our methodology - how this data is sourced, computed, and verified.

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