Counties → Illinois

McHenry County, Illinois

Water Systems

307

Population Served

271,051

Total Violations

11,554

PFAS Detected

of 12 tested

Water Systems

System Name	Population	Violations	PFAS
CRYSTAL LAKE	40,661	54	Detected
ALGONQUIN	30,700	83	Clean
LAKE IN THE HILLS	28,661	52	Detected
HUNTLEY	28,495	84	Clean
WOODSTOCK	25,630	35	Clean
MCHENRY	22,335	101	Detected
CARY	17,826	66	Detected
HARVARD	9,469	79	Clean
PRAIRIE PATH WATER CO-WHISPERING HILLS	8,300	76	Detected
MARENGO	7,572	14	Detected
FOX RIVER GROVE	4,702	51	Detected
LAKEWOOD	4,267	242	—
WONDER LAKE	3,870	403	Clean
RICHMOND	2,087	58	—
WONDER LAKE (NIU)	1,950	402	—
AQUA ILLINOIS-MCHENRY SHORES	1,862	265	—
HEBRON	1,368	11	—
PRAIRIE PATH WATER COMPANY-KILLARNEY	1,232	27	—
JOHNSBURG NO.2	1,124	157	—
PRAIRIE GROVE SCHOOL	1,050	147	—
OAKBROOK ESTATES MHP	1,012	27	—
PRAIRIE PATH WATER COMPANY-HOLIDAY HILLS	868	19	—
AQUA ILLINOIS-CRYSTAL CLEAR WATER CO.	855	418	—
PRAIRIE PATH WATER COMPANY-WALK UP WOODS	775	27	—
AQUA ILLINOIS-EASTWOOD MANOR	728	309	—
SNAP ON TOOLS	700	35	—
IL AMERICAN-TERRA COTTA	681	0	—
UNION	594	95	—
JOHNSBURG JR HIGH SCHOOL	575	61	—
SPRING GROVE ELEMENTARY SCHOOL	500	103	—
ST PETERS CHURCH	500	8	—
LIPPOLD PARK CON SOFTBALL BONCOSKY	500	0	—
AQUA ILLINOIS-NUNDA	485	194	—
GREENWOOD SCHOOL	400	66	—
ILLINOIS TURNER CAMP POOL	400	26	—
RESURRECTION CHURCH	350	12	—
CAFE 31 NORTH	300	9	—
CHRIST THE KING CHURCH	300	11	—
VALLEY VIEW SCHOOL	300	176	—
NORTHWESTERN MEDICINE WOODSTOCK HOSPITAL	300	24	—
SCOT FORGE	253	68	—
CRYSTAL CREEK FARM	251	0	—
CRYSTAL LAKE PARK D/W HERRICK	250	0	—
SHILOH CHURCH	250	96	—
RIVERSIDE PUB	220	15	—
RILEY COMMUNITY SCHOOL	220	87	—
KINGDOM HALL OF JEHOVAHS WITNESSES	219	2	—
MARY ANN BEEBE CTR/ACTIVITY CTR (18226)	200	27	—
CRYSTAL LAKE MONTESSORI	200	193	—
BIG FOOT INN	200	8	—