Cook County, Illinois Water Systems

Cook County, Illinois

263 community water systems on record — 163 active, 100 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 Cook County, Illinois

System name	City	Population served	Status
AFFORDABLE LIVING CONCEPTS	WHEELING TWP	173	Inactive
ALPINE VILLAGE MHP	PHOENIX	994	Active
ALSIP	ALSIP	19,063	Active
AQUA ILLINOIS-NORTH MAINE UTILITIES	KANKAKEE	30,043	Active
AQUA ILLINOIS-SUMMERDALE	KANKAKEE	145	Active
AQUA ILLINOIS-TIMBER RIDGE	KANKAKEE	2,322	Active
ARLINGTON HEIGHTS	ARLINGTON HEIGHTS	73,320	Active
ARLINGTON PARK RACE TRACK	ARLINGTON HEIGHTS	0	Inactive
BARRINGTON WOODS MWA	PALATINE TWP	210	Inactive
BARTLETT	BARTLETT	41,500	Active
BEDFORD PARK	BEDFORD PARK	602	Active
BELLWOOD	BELLWOOD	19,156	Active
BERKELEY	BERKELEY	5,214	Active
BERWYN	BERWYN	57,250	Active
BLACKHAWK ESTATES LLC	CHICAGO	1,238	Active
BLUE ISLAND	BLUE ISLAND	21,494	Active
BOURBON SQUARE APTS	PALATINE TWP	1,224	Inactive
BRIDGEVIEW	BRIDGEVIEW	16,467	Active
BRIDGEVIEW SOUTHFIELD SBDV	BRIDGEVIEW	2,200	Inactive
BROADVIEW	BROADVIEW	7,847	Active
BROADVIEW-WESTCHESTER JOINT WATER AGENCY	BROADVIEW	1	Active
BROOKFIELD	BROOKFIELD	18,776	Active
BROOKFIELD ZOOLOGICAL PARK	BROOKFIELD	385	Inactive
BROOKFIELD-NORTH RIVERSIDE WATER COMM.	BROOKFIELD	1	Active
BUCKHORN RANCH ESTATES MHP	DENVER	702	Active
BUFFALO GROVE	BUFFALO GROVE	43,212	Active
BURNHAM	BURNHAM	3,989	Active
CALUMET CITY	CALUMET CITY	37,000	Active
CALUMET PARK	CALUMET PARK	8,442	Active
CANDLELIGHT VILLAGE MHP	FARMINGTON HILLS	420	Active
CENTRAL STICKNEY SD	BURBANK	2,400	Active
CHICAGO	CHICAGO	2,746,388	Active
CHICAGO HEIGHTS	CHICAGO HEIGHTS	26,184	Active
CHICAGO READ MHC	NORWOOD PARK TWP	1,700	Inactive
CHICAGO RIDGE	CHICAGO RIDGE	14,130	Active
CICERO	CICERO	83,000	Active
COLEMAN TRI-CO SERVICES	COLEMAN TRI-CO SERVICES	25	Inactive
COMMUNITY	COMMUNITY	25	Inactive
COMMUNITY WELL	COMMUNITY WELL	25	Inactive
CONCORD TERRACE WTR CMPNY INC	SCHAUMBURG TWP	150	Inactive
COOK CO COUNTRYSIDE PLAZA	—	50	Inactive
COOK CO FERNDALE HGTS SUBD	PALATINE	11,724	Inactive
COOK CO NO SHORE TOWERS CONDO	—	180	Inactive
COOK COUNTY EDGEWOOD AC	COOK COUNTY	175	Inactive
COOK COUNTY MOBILE HOMES	COOK COUNTY MOBILE HOMES	25	Inactive
COPELL APARTMENTS	COPELL APARTMENTS	25	Inactive
CORDIAL COURTS MHP	CORDIAL COURTS MHP	25	Inactive
CORNLAND COMM CENTER APTS	CORNLAND COMM CENTER APTS	25	Inactive
COUNTRY ACRES MHP SUPPLY #2	COUNTRY ACRES MHP SUPPLY #2	25	Inactive
COUNTRY ACRES SUBD	COUNTRY ACRES SUBD	25	Inactive
COUNTRY CLUB HILLS	COUNTRY CLUB HILLS	16,500	Active
COUNTRY CLUB MANOR WELL #1	COUNTRY CLUB MANOR WELL #1	25	Inactive
COUNTRY ESTATES	COUNTRY ESTATES	25	Inactive
COUNTRY ESTATES	COUNTRY ESTATES	25	Inactive
COUNTRY LN	COUNTRY LN	25	Inactive
COUNTRY MANOR MOBILE HOME PK	COUNTRY MANOR MOBILE HOME PK	25	Inactive
COUNTRY OAKS	COUNTRY OAKS	25	Inactive
COUNTRY VIEW ESTATES	COUNTRY VIEW ESTATES	25	Inactive
COUNTRYSIDE	COUNTRYSIDE	6,420	Active
COX'S SUBDIVISION	COX'S SUBDIVISION	25	Inactive
CRESTWOOD	CRESTWOOD	10,826	Active
DES PLAINES	DES PLAINES	60,675	Active
DES PLAINES MHP	DESPLAINES	405	Active
DIVINE WORD SEMINARY	NORTHFIELD TWP	105	Inactive
DIXMOOR	DIXMOOR	2,973	Active
DOLTON	DOLTON	20,510	Active
DON FORTNER SUBDIVISION	DON FORTNER SUBDIVISION	25	Inactive
DONMAR MOBILE HOME ACESSORIES	DONMAR MOBILE HOME ACESSORIES	25	Inactive
DOUBLE H MOBILE HOME PARK	DOUBLE H MOBILE HOME PARK	25	Inactive
EAST HAZEL CREST	EAST HAZEL CREST	1,500	Active
EDWARD HINES JR V A HOSPITAL	HINES	60	Active
ELK GROVE VILLAGE	ELK GROVE VILLAGE	34,700	Active
ELMWOOD PARK	ELMWOOD PARK	25,000	Active
EVANSTON	EVANSTON	74,486	Active
EVERGREEN PARK	EVERGREEN PARK	19,943	Active
FLOSSMOOR	FLOSSMOOR	9,371	Active
FORD HEIGHTS	FORD HEIGHTS	1,813	Active
FOREST PARK	FOREST PARK	14,340	Active
FOREST VIEW	FOREST VIEW	800	Active
FRANCISCAN SISTERS OF CHICAGO	LEMONT	505	Active
FRANKLIN PARK	FRANKLIN PARK	18,467	Active
GARDEN HOME SD	GARDEN HOMES	1,472	Active
GLEN ACRES TRAILER PARK	GLEN ACRES TRAILER PARK	25	Inactive
GLEN EDEN ESTATES HOMEOWNERS ASSOCIATION	NORWOOD PARK TOWNSHIP	312	Active
GLENBROOK SD	TECHNY	822	Active
GLENCOE	GLENCOE	8,849	Active
GLENVIEW	GLENVIEW	47,856	Active
GLENVIEW NAVAL AIR STATION	NORTHFIELD TWP	1,500	Inactive
GLENWOOD	GLENWOOD	8,956	Active
GOLF	GOLF	497	Active
GOLF GREENWOOD IMPROVEMENT ASSOCIATION	DES PLAINES	219	Inactive
HANOVER PARK	HANOVER PARK	37,470	Active
HARBOR POINT ESTATES MHP	NORTHBROOK	950	Active
HARVEY	HARVEY	25,000	Active
HARWOOD HEIGHTS	HARDWOOD HEIGHTS	9,065	Active
HAZEL CREST	HAZEL CREST	13,098	Active
HENRY LEADY TRAILER PARK	HENRY LEADY TRAILER PARK	25	Inactive
HERRICK HS	HANOVER TWP	57	Inactive
HERRON MOBILE HOME PARK	HERRON MOBILE HOME PARK	25	Inactive
HICKORY HILLS	HICKORY HILLS	14,505	Active
HICKORY LN HOMEOWNERS ASSN	PROVISO TWP	25	Inactive
HILLSIDE	HILLSIDE	8,200	Active
HILLSIDE BERKELEY WATER COMMISSION	BELLWOOD	1	Active
HODGKINS	HODGKINS	1,472	Active
HOFFMAN ESTATES	HOFFMAN ESTATES	25	Inactive
HOFFMAN ESTATES	HOFFMAN ESTATES	50,179	Active
HOFFMAN ESTS SOUTH	HOFFMAN ESTATES	25	Inactive
HOLY FAMILY VILLA	LEMONT	200	Inactive
HOMETOWN	HOMETOWN	4,240	Active
HOMEWOOD	HOMEWOOD	19,463	Active
IL AMERICAN-ALPINE HEIGHTS	GODFREY	707	Active
IL AMERICAN-CHICAGO SUBURBAN	GODFREY	11,187	Active
IL AMERICAN-FERNWAY	GODFREY	5,223	Active
IL AMERICAN-LAKE WATER COMPANY	GODFREY	0	Active
IL AMERICAN-MIDWEST PALOS	GODFREY	132	Active
IL AMERICAN-MORELAND	GODFREY	445	Active
IL AMERICAN-WAYCINDEN	GODFREY	1,934	Active
INDIAN HEAD PARK	INDIAN HEAD PARK	3,240	Active
INVERNESS THE SHIRES	INVERNESS THE SHIRES	800	Inactive
JUSTICE-WESLEY FIELDS	JUSTICE	1	Inactive
JUSTICE-WILLOW SPRINGS WATER COMMISSION	JUSTICE	18,457	Active
KENILWORTH	KENILWORTH	2,514	Active
LA GRANGE	LA GRANGE	16,200	Active
LA GRANGE ESTATES MHP	LAGRANGE	440	Active
LA GRANGE HIGHLANDS SANITARY DISTRICT	LAGRANGE	6,600	Active
LA GRANGE PARK	LAGRANGE PARK	13,011	Active
LAKE RUN APTS	NORTHFIELD TWP	700	Inactive
LANSING	LANSING	29,076	Active
LEMONT	LEMONT	17,500	Active
LEYDEN TWSP WATER DISTRICT	FRANKLIN PARK	10,000	Active
LINCOLNWOOD	LINCOLONWOOD	13,463	Active
LINDENTREE TOWNHOMES	GLENVIEW	232	Active
LINWAY ESTATES MHP	BLUE ISLAND	380	Active
LITTLE CITY FOUNDATION	PALATINE TWP	250	Inactive
LOYOLA UNIV MED CNTR	PROVISO TWP	8,800	Inactive
LYNWOOD	LYNWOOD	9,149	Active
LYONS	LYONS	10,304	Active
MARKHAM	MARKHAM	12,500	Active
MATTESON	MATTESON	18,293	Active
MAYWOOD	MAYWOOD	24,090	Active
MC COOK	MCCOOK	280	Active
MELROSE PARK	MELROSE PARK	24,206	Active
MERRIONETTE PARK	MERRIONETTE PARK	1,969	Active
MID-MARK WATER COMMISSION	MARKHAM	25	Active
MIDLOTHIAN	MIDLOTHIAN	14,819	Active
MIDWAY MANOR APTS	MIDWAY MANOR APTS	25	Inactive
MIDWAY TRAILER COURT	MIDWAY TRAILER COURT	25	Inactive
MILL CREEK MANOR WELL #1	MILL CREEK MANOR WELL #1	25	Inactive
MISSION BROOK SD	NORTHBROOK	2,852	Active
MOORINGS HLTH CTR	WHEELING TWP	135	Inactive
MORTON GROVE	MORTON GROVE	25,297	Active
MORTON GROVE - NILES WATER COMMISSION	NILES	0	Active
MOUNT PROSPECT	MOUNT PROSPECT	41,000	Active
NILES	NILES	29,350	Active
NILES NURSING AND REHABILITATION	NILES	304	Inactive
NORRIDGE	NORRIDGE	15,251	Active
NORTH EASTERN AVE	NORTH EASTERN AVE	25	Inactive
NORTH GATE ESTATES INC MHP	NORTH GATE ESTATES INC MHP	25	Inactive
NORTH GLENVIEW MHP	GLENVIEW	150	Inactive
NORTH GLENVIEW MHP	NORTH GLENVIEW MHP	25	Inactive
NORTH RIVERSIDE	NORTH RIVERSIDE	7,071	Active
NORTHBROOK	NORTHBROOK	34,407	Active
NORTHEAST HARTMAN SUBDIVISION	NORTHEAST HARTMAN SUBDIVISION	25	Inactive
NORTHFIELD	NORTHFIELD	5,470	Active
NORTHFIELD MHP	NORTHFIELD MHP	25	Inactive
NORTHLAKE	NORTH LAKE	12,840	Active
NORTHWEST SUBURBAN MUNICIPAL JAWA	ELK GROVE VILLAGE	1	Active
NORTHWEST WATER COMMISSION	DES PLAINES	1	Active
NORTHWOOD & ISLAND LANE ASSN	NORTHWOOD & ISLAND LANE ASSN	25	Inactive
O'HARE AIR RSRV FORCES FCLTY	MAINE TWP	1,500	Inactive
OAK FOREST	OAK FOREST	27,478	Active
OAK FOREST HEALTH CENTER	CHICAGO	1,500	Inactive
OAK LANE MHC	DENVER	388	Active
OAK LAWN	OAK LAWN	58,362	Active
OAK PARK	OAK PARK	54,583	Active
OASIS MHP	NORTHBROOK	3,000	Active
OLYMPIA FIELDS	OLYMPIA FIELDS	4,922	Active
OLYMPIA FIELDS COUNTRY CLUB	OLYMPIA FIELDS	61	Inactive
ORLAND HILL SBDV	ORLAND TWP	140	Inactive
ORLAND PARK	ORLAND PARK	58,020	Active
PALATINE	PALATINE	70,875	Active
PALOS HEIGHTS	PALOS HEIGHTS	15,500	Active
PALOS HILLS	PALOS HILLS	18,530	Active
PALOS PARK	PALOS PARK	4,873	Active
PALOS PARK (WTR ASSN)	PALOS PARK (WTR ASSN)	160	Inactive
PALOS PARK BROOKSIDE S	PALOS PARK BROOKSIDE S	40	Inactive
PALOS PARK THE COMMONS	PALOS PARK THE COMMONS	350	Inactive
PARADISE MHP	PHOENIX	460	Active
PARK FOREST	PARK FOREST	21,687	Active
PARK RIDGE	PARK RIDGE	39,800	Active
PHOENIX	PHOENIX	1,994	Active
PLUM CREEK CONDOS	WHEELING	570	Inactive
PLUM GROVE CONDOS	LIBERTYVILLE	250	Inactive
POOR CLARES MONASTERY	PALOS PARK	6	Inactive
POSEN	POSEN	5,331	Active
PROSPECT HEIGHTS	PROSPECT HEIGHTS	2,280	Active
RICHTON PARK	RICHTON PARK	12,504	Active
RIVER FOREST	RIVER FOREST	11,717	Active
RIVER GROVE	RIVER GROVE	10,282	Active
RIVER OAKS ESTATES MHP	BLOOMFIELD HILLS	677	Active
RIVERDALE	RIVERDALE	10,266	Active
RIVERSIDE	RIVERSIDE	9,298	Active
ROBBINS	ROBBINS	5,415	Active
ROLLING MEADOWS	ROLLING MEADOWS	23,329	Active
ROSEBUD MHP	BRIDGEVIEW	2,250	Inactive
ROSEMONT	ROSEMONT	3,952	Active
SANTA FE MNP	LYONS TWP	88	Inactive
SAUK	SAUK VILLAGE	9,921	Active
SCHAUMBURG	SCHAUMBURG	75,750	Active
SCHILLER PARK	SCHILLER PARK	11,709	Active
SILO MHP	LYNWOOD	25	Inactive
SKOKIE	SKOKIE	66,422	Active
SOUTH BARRINGTON	GENEVA	1,175	Active
SOUTH CHICAGO HEIGHTS	SOUTH CHICAGO HEIGHTS	3,924	Active
SOUTH HOLLAND	SOUTH HOLLAND	22,000	Active
SOUTH PALOS TWSP SANITARY DIST	PALOS PARK	2,800	Active
SOUTH STICKNY SD	BURBANK	30,000	Active
SPRING LAKES MHP	ELGIN	904	Active
ST OF ILL CHI CIRCLE CAMPUS	—	20,000	Inactive
ST OF ILL CHI MH MED CTR COMPL	—	1,000	Inactive
ST OF ILL CHI STATE UNIV	—	6,800	Inactive
ST OF ILL MADDEN MH CENTER	—	1,000	Inactive
ST OF ILL NORTHEASTERN IL UNIV	—	10,000	Inactive
ST OF ILL UOFI MED CENTER CAMP	—	5,000	Inactive
STATE OF ILLINOIS E LUDEMAN DE	STATE OF ILLINOIS E LUDEMAN DE	1,000	Inactive
STEGER	MANTENO	9,700	Active
STERLING ESTATES MHP	FARMINGTON HILLS	1,954	Active
STICKNEY	STICKNEY	6,902	Active
STONE PARK	WEST CHICAGO	4,576	Active
STREAMWOOD	STREAMWOOD	39,577	Active
SUMMERLAND APTS	SUMMERLAND APTS	25	Inactive
SUMMIT	SUMMIT	10,875	Active
SUNNY ACRES NURSING HOME	SUNNY ACRES NURSING HOME	25	Inactive
SUNRISE SENIOR LIVING	PROSPECT HEIGHTS	100	Active
SUNSET LAKE	SUNSET LAKE	25	Inactive
SUNSET MHP	NORTHBROOK	1,400	Active
SUNSET VIEW HOMEOWNERS ASSN	SUNSET VIEW HOMEOWNERS ASSN	25	Inactive
SUNSET VIEW MHP A	SUNSET VIEW MHP A	25	Inactive
SUNSET VIEW MHP B	SUNSET VIEW MHP B	25	Inactive
THORNTON	THORNTON	2,333	Active
TIMBER RIDGE	TIMBER RIDGE	25	Inactive
TINLEY PARK	TINLEY PARK	56,703	Active
TINLEY PARK MHC	TINLEY PARK	300	Inactive
UNION PACIFIC RAILROAD	DOLTON	1,500	Inactive
UTL INC-COUNTY LINE WATER COMPANY	MCHENRY	366	Inactive
VILLAGE OF LEE	VILLAGE OF LEE	25	Inactive
VILLAGE PARK MHP	VILLAGE PARK MHP	25	Inactive
VISTA HGTS	VISTA HGTS	25	Inactive
WEATHERSTONE LAKES MHP	PHOENIX	221	Active
WESTCHESTER	WESTCHESTER	16,241	Active
WESTERN SPRINGS	WESTERN SPRINGS	13,274	Active
WHEELING	WHEELING	39,725	Active
WILLARD COTHRAN APTS	WILLARD COTHRAN APTS	25	Inactive
WILLIAM BLAYLOCK	WILLIAM BLAYLOCK	25	Inactive
WILLIAM HESTER	WILLIAM HESTER	25	Inactive
WILLOW WAY TERRACE	WILLOW WAY TERRACE	25	Inactive
WILLOWAY TERRACE MHP	CHICAGO	900	Active
WILMETTE	WILMETTE	27,087	Active
WILSON ADDITION	WILSON ADDITION	25	Inactive
WINDGATE COUNTY ESTATES	WINDGATE COUNTY ESTATES	25	Inactive
WINDGATE HOME	WINDGATE HOME	25	Inactive
WINNETKA	WINNETKA	12,475	Active
WORTH	WORTH	10,970	Active