PlainEnviro

Mchenry Water Quality

Illinois

Health Violations

The tap water in Mchenry, Illinois is served by 18 EPA-regulated water systems covering approximately 42,152 people. 8 health-based violations are on record, most recently for 5200 in 2024. Data source: EPA Safe Drinking Water Information System.

18
Water Systems
42,152
Population Served
8
Total Violations
8
Health-Based Violations

Drinking water in Mchenry, Illinois is delivered through 18 EPA-regulated community water systems serving an estimated 42,152 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.

The SDWIS record for Mchenry shows 8 total violations across all 18 systems, of which 8 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 5200, 0300, 5000. 2 TRI-reporting industrial facilities are also located within the city limits.

A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Illinois drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.

Community Water Systems

System Name Pop. Served Violations Status
MCHENRY 22,335 1 Health
PRAIRIE PATH WATER CO-WHISPERING HILLS 8,300 1 Health
PRAIRIE PATH WATER COMPANY-OAKWOOD 1,600 2 Health
PRAIRIE PATH WATER COMPANY-WESTLAKE 1,493 0 Clean
PRAIRIE PATH WATER COMPANY-KILLARNEY 1,232 0 Clean
PRAIRIE PATH WATER COMPANY-HARBOR RIDGE 1,064 0 Clean
PRAIRIE PATH WATER COMPANY-LAKE MARIAN 1,022 1 Health
PRAIRIE PATH WATER COMPANY-COVENTRY HILL 882 0 Clean
PRAIRIE PATH WATER COMPANY-HOLIDAY HILLS 868 0 Clean
PRAIRIE PATH WATER COMPANY-WALK UP WOODS 775 1 Health
PRAIRIE PATH WATER COMPANY-NORTHERN HILL 600 0 Clean
PRAIRIE PATH WATER COMPANY-WILDWOOD 490 0 Clean
PRAIRIE PATH WATER CO-COVENTRY CREEK 388 0 Clean
PRAIRIE PATH WATER COMPANY-DEL-MAR 300 2 Health
PRAIRIE PATH WATER COMPANY-ROCKVALE 298 0 Clean
PRAIRIE PATH WATER COMPANY-VALENTINE 252 0 Clean
PRAIRIE PATH WATER COMPANY-CHAR-MAR 186 0 Clean
PRAIRIE PATH -PORT BARRINGTON SHORES 67 0 Clean

Does this city have health-based water violations?

Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.

Contaminant Begin Date
5200 2024-10-17
0300 2020-07-01
0300 2020-07-01
5000 2014-04-01
5000 2006-03-03
5000 2003-11-04
5000 2002-01-01
5000 1992-04-02

TRI Facilities in Mchenry

Facility Total Releases
Ozinga Ready-Mix Concrete - McHenry 0 lbs
Prem Magnetics Inc 0 lbs

Frequently Asked Questions

Is Mchenry, Illinois water safe to drink? ▼
Mchenry is served by 18 EPA-regulated water systems covering approximately 42,152 people. 8 health-based violations have been recorded. A past violation does not necessarily mean water is currently unsafe, systems are required to notify customers and resolve issues. Contact your local water utility for current status.
How many water violations does Mchenry have? ▼
Mchenry water systems have a total of 8 violations on record in the EPA Safe Drinking Water Information System, of which 8 are health-based (MCL exceedances). The remaining violations are monitoring or reporting violations.
What contaminants were found in Mchenry water? ▼
Health-based violations for Mchenry water systems include the following contaminants: 5200, 0300, 5000. Source: EPA Safe Drinking Water Information System (SDWIS).
How many water systems serve Mchenry? ▼
18 EPA-regulated community water systems serve Mchenry, Illinois, collectively covering approximately 42,152 people. Data is from the EPA Safe Drinking Water Information System (SDWIS).
Where does Mchenry get its drinking water? ▼
Mchenry's water supply comes from 18 EPA-regulated community water systems. Source type data is not available for all systems. For detailed supply information, contact your local water utility. Source: EPA SDWIS.
Are there pollution sources near Mchenry? ▼
Yes, 2 EPA Toxic Release Inventory (TRI) facilities are registered in Mchenry, Illinois, reporting a combined 0 lbs of toxic chemical releases. TRI data reflects self-reported emissions; it does not measure exposure or health effects. Source: EPA TRI.

Related Guides

Understanding Water Quality Violations
What MCL violations mean and how to read EPA data
How to Check Environmental Quality
Step-by-step guide to checking your local environment
Understanding EPA Data
How EPA collects and publishes environmental data

About This Data

Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.

A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.

TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.

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

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial