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MCHENRY

Illinois — Community Water System — PWSID: IL1110600

System Information

PWSIDIL1110600
System NameMCHENRY
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1981
Last ReportedDec 4, 2025

Location & Contact

StateIllinois
CityMCHENRY
ZIP Code60050
Address1415 Industrial Drive
OrganizationMCMAHON, JASON
Phone847-417-0565

Population & Service

Population Served22,335
Service Connections8,484

Drinking Water Violations (97)

This water system has 97 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jul 1, 2025 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Jul 1, 2025 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Feb 29, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Feb 29, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Feb 29, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Feb 29, 2024 Lead and Copper Rule
Jan 1, 2023 Dec 31, 2023 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2023 Volatile Organic Chemicals

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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