McHenry County, Illinois Water Systems

McHenry County, Illinois

47 community water systems on record — 32 active, 15 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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.

Community water systems in McHenry County, Illinois

System name	City	Population served	Status
ALGONQUIN	ALGONQUIN	30,700	Active
AQUA ILLINOIS-CRYSTAL CLEAR WATER CO.	KANKAKEE	855	Active
AQUA ILLINOIS-EASTWOOD MANOR	KANKAKEE	728	Active
AQUA ILLINOIS-MCHENRY SHORES	KANKAKEE	1,862	Active
AQUA ILLINOIS-NUNDA	KANKAKEE	485	Active
C AND A WTR CORP	NUNDA TWP	25	Inactive
CARY	CARY	17,826	Active
CRYSTAL HEIGHTS ASSOCIATION	CRYSTAL LAKE	0	Inactive
CRYSTAL LAKE	CRYSTAL LAKE	40,661	Active
DEERING OAKS SUBDIVISION	LIBERTYVILLE	3	Inactive
FOX RIVER GROVE	FOX RIVER GROVE	4,702	Active
HARBOR LITES-PISTAKEE FSHG CL	CHICAGO	132	Active
HARVARD	HARVARD	9,469	Active
HEBRON	HEBRON	1,368	Active
HIGHLAND SHORES WATER COMPANY	WONDER LAKE	1,000	Inactive
HUNTLEY	HUNTLEY	28,495	Active
IL AMERICAN-TERRA COTTA	GODFREY	681	Active
JOHNSBURG 1	JOHNSBURG	174	Active
JOHNSBURG NO.2	JOHNSBURG	1,124	Active
LAKE IN THE HILLS	LAKE IN THE HILLS	28,661	Active
LAKEVIEW ACRES HOME OWNERS ASSN	RICHMOND	35	Inactive
LAKEWOOD	LAKEWOOD	4,267	Active
MARENGO	MARENGO	7,572	Active
MARENGO ESTS SBDV	UNSPEC PL IN CO	4,360	Inactive
MC HENRY COUNTY PISTAKEE HIG	MC HENRY COUNTY PISTAKEE HIG	2,156	Inactive
MC HENRY COUNTY SUNSET VIEW	MC HENRY COUNTY SUNSET VIEW	110	Inactive
MCHENRY	MCHENRY	22,335	Active
MEADOWS OF WEST BAY WATER TREATMENT	WONDER LAKE	108	Inactive
OAKBROOK ESTATES MHP	NORTHBROOK	1,012	Active
PRAIRIE PATH WATER CO-WHISPERING HILLS	MCHENRY	8,300	Active
PRAIRIE PATH WATER COMPANY-HOLIDAY HILLS	MCHENRY	868	Active
PRAIRIE PATH WATER COMPANY-KILLARNEY	MCHENRY	1,232	Active
PRAIRIE PATH WATER COMPANY-WALK UP WOODS	MCHENRY	775	Active
PRAIRIE RIDGE ASSOCIATION	SCHAUMBURG	148	Active
RICHMOND	RICHMOND	2,089	Active
ROYAL OAKS MHP	CHICAGO	170	Active
SPRING BLUFF SBDV	UNSPEC PL IN CO	25	Inactive
SUNNYSIDE	SUNNYSIDE	306	Inactive
SUNNYSIDE WTR CO.	SUNNYSIDE WTR CO.	347	Inactive
TERRA COTTA REALTY	NUNDA TWP	42	Inactive
TROUT VALLEY ASSOCIATION	CARY	18	Inactive
UNION	UNION	594	Active
VALLEY HI NURSING HOME	VOLO	125	Active
WONDER LAKE	WONDER LAKE	3,870	Active
WONDER LAKE (NIU)	WONDER LAKE	1,950	Active
WOODS CREEK WATER SUPPLY	WONDER LAKE	1,000	Inactive
WOODSTOCK	WOODSTOCK	25,630	Active