Public Water Partners

MCHENRY, IL · McHenry County

MCHENRY Water System

Consumer Confidence Report status

MCHENRY must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for MCHENRY.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.

System facts

System ID (PWSID)
IL1110600
System type
Community Water System
Population served
22,335
Service connections
8,484
Ownership
local government
Water source
groundwater (wells)

MCHENRY is one of 225 community water systems in Illinois in the 10,001 to 100,000 people size category, serving 22,335 people from groundwater.

As of August 1, 2026, its federal record holds 26 entries between 1977 and 2025, all of which EPA lists as closed.

All 26 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, the Lead and Copper Rule, and the Radionuclides and Revised Rad Rule.

Violation history

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    July 1, 2025 – December 31, 2025

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    October 1, 2023 – February 29, 2024

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 2023 – December 31, 2023

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    April 1, 1997 – June 30, 1997

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    January 1, 1997 – March 31, 1997

    Resolved

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    June 30, 1977 – June 29, 1981

    Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Common questions

Is MCHENRY required to publish a Consumer Confidence Report?

Yes. MCHENRY is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is MCHENRY’s next Consumer Confidence Report due?

MCHENRY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does MCHENRY have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for MCHENRY.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

MCMAHON, JASON

847-417-0565

MCHENRY, IL 60050