States / Illinois / Drinking Water
Drinking Water Systems in Illinois
1,787 community water systems serving about 12,093,685 people. 446 have a health-based violation on record since 2015, 90 of them unresolved.
SystemHealth-based violations (2015+)
SILVIS HEIGHTS WATER CORP · Rock Island County · 1,450 served · groundwater11 (5 unresolved)
LAWRENCEVILLE · LAWRENCEVILLE · 4,524 served · groundwater5 (5 unresolved)
ATKINSON · ATKINSON · 955 served · groundwater4 (4 unresolved)
SIMS · SIMS · 244 served · purchased surface water4 (4 unresolved)
CUTLER · CUTLER · 463 served · groundwater73 (3 unresolved)
SPARTA · SPARTA · 4,395 served · surface water45 (3 unresolved)
SECOR · SECOR · 351 served · groundwater45 (3 unresolved)
DANFORTH · DANFORTH · 550 served · groundwater21 (3 unresolved)
ST ROSE PWD · Clinton County · 1,688 served · purchased surface water9 (3 unresolved)
WINSLOW · WINSLOW · 350 served · groundwater9 (3 unresolved)
MINERAL · MINERAL · 250 served · groundwater8 (3 unresolved)
EAGARVILLE · EAGERVILLE · 127 served · purchased surface water6 (3 unresolved)
CORTLAND CORNERS MHP · DeKalb County · 205 served · groundwater5 (3 unresolved)
HARRISBURG · HARRISBURG · 8,524 served · purchased groundwater3 (3 unresolved)
SILVIS · SILVIS · 7,473 served · purchased surface water3 (3 unresolved)
DUQUOIN · DU QUOIN · 7,169 served · purchased surface water3 (3 unresolved)
ROUND LAKE PARK · ROUND LAKE PARK · 4,900 served · purchased surface water3 (3 unresolved)
ELDORADO · ELDORADO · 4,715 served · purchased groundwater3 (3 unresolved)
FOUNTAIN WATER DISTRICT · VALMEYER · 3,650 served · groundwater3 (3 unresolved)
FULTON · FULTON · 3,346 served · groundwater3 (3 unresolved)
PROPHETSTOWN · PROPHETSTOWN · 2,100 served · groundwater3 (3 unresolved)
GREEN OAKS · GREEN OAKS · 1,470 served · purchased surface water3 (3 unresolved)
WARRENSBURG · WARRENSBURG · 1,230 served · groundwater3 (3 unresolved)
TOULON · TOULON · 1,193 served · groundwater3 (3 unresolved)
ALBANY · ALBANY · 846 served · groundwater3 (3 unresolved)
CHANDLERVILLE · CHANDLERVILLE · 838 served · groundwater3 (3 unresolved)
FINDLAY · FINDLAY · 750 served · purchased surface water3 (3 unresolved)
BROOKPORT · BROOKPORT · 730 served · groundwater3 (3 unresolved)
TAMPICO · TAMPICO · 689 served · groundwater3 (3 unresolved)
DALZELL · DALZELL · 663 served · groundwater3 (3 unresolved)
CHADWICK · CHADWICK · 523 served · groundwater3 (3 unresolved)
COLP · COLP · 506 served · purchased surface water3 (3 unresolved)
RANKIN · RANKIN · 500 served · groundwater3 (3 unresolved)
LOSTANT · LOSTANT · 463 served · groundwater3 (3 unresolved)
HOPEWELL · Marshall County · 420 served · groundwater3 (3 unresolved)
LODA · LODA · 398 served · groundwater3 (3 unresolved)
FREEMAN SPUR · FREEMANSPUR · 373 served · purchased surface water3 (3 unresolved)
MANLIUS · MANLIUS · 298 served · groundwater3 (3 unresolved)
PULASKI · PULASKI · 202 served · purchased groundwater3 (3 unresolved)
STRAWN · STRAWN · 133 served · groundwater3 (3 unresolved)
JEISYVILLE · JEISEYVILLE · 102 served · purchased surface water3 (3 unresolved)
HETTICK · HETTICK · 174 served · purchased surface water33 (2 unresolved)
BLUE MOUND · BLUE MOUND · 1,300 served · groundwater18 (2 unresolved)
NEW WINDSOR · WINDSOR · 740 served · groundwater16 (2 unresolved)
CALUMET CITY · CALUMET CITY · 37,000 served · purchased surface water8 (2 unresolved)
ST JACOB · SAINT JACOB · 1,835 served · purchased surface water8 (2 unresolved)
OAK RIDGE SANITARY DISTRICT · METAMORA · 300 served · groundwater8 (2 unresolved)
EAST MORELAND WTR SERVICE ASSN · NEW LENOX · 1,320 served · groundwater6 (2 unresolved)
FIELDS HILL IMPROVEMENT ASSOCIATION · LaSalle County · 312 served · purchased groundwater6 (2 unresolved)
GILLESPIE · Macoupin County · 3,737 served · surface water5 (2 unresolved)
HARVARD HILLS WATER CORPORATION · WASHINGTON · 215 served · groundwater5 (2 unresolved)
MAYWOOD · MAYWOOD · 24,090 served · purchased surface water2 (2 unresolved)
MARSEILLES · MARSEILLES · 5,061 served · groundwater2 (2 unresolved)
MCLEANSBORO · MCLEANSBORO · 2,812 served · purchased surface water2 (2 unresolved)
CENTRAL STICKNEY SD · Cook County · 2,400 served · purchased surface water2 (2 unresolved)
LAKE BARRINGTON SHORES SUBDIVSION · LAKE BARRINGTON · 2,300 served · groundwater2 (2 unresolved)
SOUTHEAST JOLIET SD · JOLIET · 2,000 served · groundwater2 (2 unresolved)
EATON PWD · Crawford County · 1,655 served · purchased groundwater2 (2 unresolved)
KINCAID · Christian County · 1,561 served · purchased surface water2 (2 unresolved)
MOUND PWD · St. Clair County · 1,500 served · groundwater2 (2 unresolved)
HILLTOP MHP · BLOOMINGTON · 1,360 served · purchased surface water2 (2 unresolved)
WATAGA · WATAGA · 965 served · groundwater2 (2 unresolved)
HURST · HURST · 782 served · purchased surface water2 (2 unresolved)
POCAHONTAS · POCAHONTAS · 697 served · purchased surface water2 (2 unresolved)
POTOMAC · POTOMAC · 685 served · groundwater2 (2 unresolved)
DAMIANSVILLE · DAMIANSVILLE · 602 served · purchased surface water2 (2 unresolved)
NORTH MEADOW VILLAGE MHP · NORMAL · 495 served · purchased groundwater2 (2 unresolved)
NEPONSET · NEPONSET · 450 served · groundwater2 (2 unresolved)
HECKER · HECKER · 429 served · purchased surface water2 (2 unresolved)
SORENTO · SORENTO · 429 served · purchased surface water2 (2 unresolved)
BLM GW MHP, LLC · BLOOMINGTON · 390 served · purchased surface water2 (2 unresolved)
HERRICK · HERRICK · 358 served · groundwater2 (2 unresolved)
PANAMA · PANAMA · 343 served · purchased surface water2 (2 unresolved)
FILLMORE · FILLMORE · 313 served · groundwater2 (2 unresolved)
LORAINE · LORAINE · 300 served · purchased groundwater2 (2 unresolved)
NEBO · NEBO · 280 served · purchased groundwater2 (2 unresolved)
RUSTIC ACRES WATER ASSOCIATION · Henry County · 260 served · groundwater2 (2 unresolved)
LAFAYETTE · LA FAYETTE · 250 served · groundwater2 (2 unresolved)
UAW SENIOR CITIZENS CENTER · PEKIN · 240 served · purchased groundwater2 (2 unresolved)
FOREST CITY · FOREST CITY · 222 served · groundwater2 (2 unresolved)
TOWNERS SUBDIVISION · Lake County · 206 served · groundwater2 (2 unresolved)
DOVER · DOVER · 200 served · groundwater2 (2 unresolved)
SPRINGERTON · SPRINGERTON · 176 served · purchased surface water2 (2 unresolved)
DUCK LAKE WELL OWNERS ASSOCIATION · Lake County · 141 served · groundwater2 (2 unresolved)
SMG - LYNNVILLE · LYNNVILLE · 130 served · purchased groundwater2 (2 unresolved)
VAN ORIN WATER COMPANY · Bureau County · 120 served · groundwater2 (2 unresolved)
LA SALLE COUNTY NURSING HOME · LaSalle County · 100 served · groundwater2 (2 unresolved)
ERIE · ERIE · 1,479 served · groundwater14 (1 unresolved)
VERMILION GROVE WATERWORKS · RIDGE FARM · 160 served · purchased groundwater5 (1 unresolved)
MORO PWD · Madison County · 723 served · purchased groundwater1 (1 unresolved)
SHANNON · SHANNON · 801 served · groundwater300
LYNWOOD 3RD ADDITION · Henry County · 100 served · groundwater195
DONNELLSON · DONNELLSON · 213 served · purchased surface water167
CHRISMAN · CHRISMAN · 1,273 served · purchased groundwater165
FOUNTAIN VALLEY MHP · Champaign County · 375 served · groundwater153
FOX LAWN HOMEOWNERS WATER ASSOCIATION · Kendall County · 167 served · groundwater129
COUNTRY ACRES MHP (LA SALLE COUNTY) · LaSalle County · 222 served · groundwater124
GREENFIELD · GREENFIELD · 1,097 served · surface water123
VERMONT · VERMONT · 738 served · surface water109
GENESEO HICKORY HILLS HOA · Henry County · 83 served · groundwater98
NORTH TAZEWELL PWD · EAST PEORIA · 7,625 served · groundwater72
NEW SALEM PWD · PETERSBURG · 451 served · purchased groundwater69
LAND AND WTR ASSN · LaSalle County · 83 served · groundwater65
BUDA · BUDA · 482 served · groundwater64
COMPTON · COMPTON · 279 served · groundwater62
DANVERS · DANVERS · 1,089 served · groundwater60
PINCKNEYVILLE · PINCKNEYVILLE · 5,804 served · surface water58
MOUNT ZION · MOUNT ZION · 5,833 served · purchased surface water48
MAEYSTOWN · MAEYSTOWN · 340 served · purchased groundwater45
LE ROY · LE ROY · 3,498 served · groundwater44
CHENOA · CHENOA · 1,785 served · groundwater43
ATLANTA · ATLANTA · 1,692 served · groundwater43
ROCHELLE · ROCHELLE · 9,446 served · groundwater42
EDINBURG · EDINBURG · 1,068 served · groundwater42
TABLE GROVE · TABLE GROVE · 353 served · purchased groundwater42
COOKSVILLE · COOKSVILLE · 157 served · groundwater42
APPLE CREEK WATER COOP · Morgan County · 968 served · purchased surface water41
MULBERRY GROVE · MULBERRY GROVE · 548 served · purchased surface water40
LA SALLE · LA SALLE · 9,700 served · groundwater39
COAL CITY · COAL CITY · 5,749 served · groundwater39
SCOTTVILLE RURAL WATER COMPANY, INC. · Macoupin County · 695 served · purchased surface water37
CENTRAL MACOUPIN COUNTY RWD · Macoupin County · 1,883 served · purchased surface water36
CHESTERFIELD · Macoupin County · 184 served · purchased surface water36
LAHARPE · LA HARPE · 1,200 served · groundwater35
GOLCONDA · GOLCONDA · 630 served · purchased groundwater35
PALMYRA · PALMYRA · 605 served · purchased surface water34
MORNINGSIDE MOBILE ESTATES MHP · Logan County · 34 served · groundwater34
FAYETTE WATER COMPANY · Fayette County · 5,608 served · purchased surface water33
DE LAND · DE LAND · 446 served · groundwater33
CAMBRIDGE · CAMBRIDGE · 2,086 served · groundwater32
ILLIOPOLIS · ILLIOPOLIS · 1,037 served · purchased groundwater32
GREEN MEADOW ESTATES OF ROCKFORD LLC · Winnebago County · 250 served · purchased groundwater31
MODESTO · MODESTO · 182 served · purchased surface water30
PALMYRA-MODESTO WATER COMMISSION · Macoupin County · 110 served · surface water30
STEELEVILLE · STEELEVILLE · 1,960 served · groundwater29
SOUTH PALMYRA WATER COMMISSION · Macoupin County · 838 served · purchased surface water29
STEWARD · STEWARD · 238 served · groundwater29
LEMONT · LEMONT · 17,500 served · groundwater28
TRENTON · TRENTON · 2,742 served · purchased surface water28
LICK CREEK PWD · Union County · 2,365 served · purchased surface water28
BEECHER CITY · BEECHER CITY · 500 served · purchased groundwater28
JASPER WATERWORKS CORPORATION · FAIRFIELD · 1,578 served · purchased surface water27
CAMARGO · CAMARGO · 750 served · purchased groundwater27
HOLIDAY SHORES SD · Madison County · 2,840 served · surface water26
EJ WATER-SANGCHRIS · NEW BERLIN · 1,025 served · purchased groundwater26
LAKE SHANNON · ESSEX · 500 served · surface water25
COLONIAL MEADOWS WATER COMPANY · McLean County · 193 served · groundwater25
CARLINVILLE · CARLINVILLE · 6,598 served · surface water24
ANNA · ANNA · 4,910 served · purchased groundwater24
IL AMERICAN-TOLONO · TOLONO · 3,604 served · purchased groundwater24
CARBON CLIFF · CARBON CLIFF · 2,134 served · groundwater24
ALEXANDER WATER DISTRICT · Morgan County · 442 served · purchased surface water24
EJ WATER-MONTROSE · MONTROSE · 201 served · purchased groundwater24
REDDICK · Kankakee County · 196 served · groundwater24
SENECA MOBILE HOMES LLC · LaSalle County · 10 served · groundwater24
MACOMB · MACOMB · 15,051 served · surface water23
EJ WATER-MCWC · HILLSBORO · 2,075 served · purchased surface water23
DEVILS KITCHEN WATER DISTRICT · Williamson County · 1,428 served · purchased surface water23
SHAWNEE VALLEY PWD · Union County · 738 served · purchased groundwater23
MILLSTONE PWD · Pope County · 5,565 served · groundwater22
NEOGA · NEOGA · 1,636 served · purchased surface water22
ASSUMPTION · ASSUMPTION · 1,315 served · groundwater22
MAPLE ACRES MHP · Bureau County · 260 served · groundwater22
MENARD RURAL WATER COOP · PETERSBURG · 753 served · purchased groundwater21
TIMBER RIDGE MOBILE ESTATES · Stephenson County · 150 served · groundwater21
LOVES PARK · LOVES PARK · 23,335 served · groundwater20
LAKE WILLIAMSON CHRISTIAN CENTER · Macoupin County · 1,250 served · purchased surface water20
THREE COUNTY PWD · Madison County · 3,575 served · purchased surface water19
MANCHESTER · MANCHESTER · 297 served · purchased surface water19
MENDOTA · MENDOTA · 7,100 served · groundwater18
SOUTH HIGHWAY PWD · Jackson County · 4,972 served · purchased surface water18
HILLSBORO · HILLSBORO · 4,402 served · surface water18
LAKESIDE PWD · Jackson County · 3,065 served · purchased surface water18
BUNCOMBE WATER DISTRICT · Jackson County · 1,030 served · purchased surface water18
EXETER-MERRITT WATER COOP · Scott County · 820 served · purchased groundwater18
COFFEEN · COFFEEN · 647 served · purchased surface water18
STRATFORD WEST ASSOCIATION, INC. · McDonough County · 44 served · groundwater17
CARBONDALE · CARBONDALE · 22,107 served · surface water16
WELDON · WELDON · 404 served · groundwater16
BUTLER · BUTLER · 253 served · purchased surface water16
SALINE VALLEY CONSERVANCY DISTRICT · ELDORADO · 3,921 served · groundwater15
RAMSEY · RAMSEY · 966 served · purchased groundwater15
WESTFIELD · WESTFIELD · 678 served · purchased groundwater15
DONOVAN · DONOVAN · 279 served · groundwater15
LIMA · LIMA · 168 served · purchased groundwater15
LITCHFIELD · Montgomery County · 6,648 served · surface water14
CHERRY VALLEY · CHERRY VALLEY · 4,731 served · groundwater14
RED BUD · RED BUD · 3,804 served · groundwater14
ALTAMONT · ALTAMONT · 2,300 served · surface water14
NEW HOPE WATERWORKS CORP · FAIRFIELD · 1,285 served · purchased surface water14
CREAL SPRINGS · CREAL SPRINGS · 683 served · purchased surface water14
INDUSTRY · INDUSTRY · 475 served · purchased groundwater14
MEADOWBROOK MH COMMUNITY, LLC · BELLEVILLE · 463 served · purchased surface water14
WOODLAND · WOODLAND · 319 served · groundwater14
BARDOLPH · BARDOLPH · 303 served · purchased surface water14
OPHIEM PWS · Henry County · 110 served · groundwater14
CAMP POINT · CAMP POINT · 1,190 served · purchased groundwater13
BLAIRSVILLE PWD · CARTERVILLE · 807 served · purchased surface water13
BOWEN · BOWEN · 494 served · purchased groundwater13
EVERGREEN WILDWOOD MOBILE HOME PARK · CARBONDALE · 230 served · purchased surface water13
NORTH CHICAGO · NORTH CHICAGO · 16,813 served · surface water12
LAKE OF EGYPT PWD · MARION · 11,368 served · surface water12
HAMPSHIRE · HAMPSHIRE · 7,758 served · groundwater12
LEBANON · LEBANON · 4,714 served · purchased surface water12
MILLSTADT · MILLSTADT · 4,071 served · purchased surface water12
TRITOWNSHIP WATER DISTRICT · HIGHLAND · 3,470 served · purchased surface water12
ABINGDON · ABINGDON · 3,275 served · purchased groundwater12
MOUNT OLIVE · Macoupin County · 2,193 served · purchased surface water12
HENDERSON PWD · Montgomery County · 2,045 served · purchased surface water12
LEXINGTON · LEXINGTON · 1,930 served · groundwater12
PIERRON · PIERRON · 1,709 served · purchased surface water12
VIENNA · VIENNA · 1,618 served · surface water12
KAHO PUBLIC WATER DISTRICT · Macoupin County · 785 served · purchased surface water12
CARLOCK · CARLOCK · 562 served · groundwater12
GRAND RIDGE · GRAND RIDGE · 515 served · groundwater12
GERMAN VALLEY · GERMAN VALLEY · 463 served · groundwater12
MCNABB · MCNABB · 258 served · groundwater12
MORTON · MORTON · 17,111 served · groundwater11
FORT MASSAC PWD · JOPPA · 6,290 served · purchased groundwater11
CARLYLE · CARLYLE · 3,373 served · surface water11
EMINGTON · EMINGTON · 120 served · groundwater11
BURNSIDE PWD · Johnson County · 2,702 served · purchased surface water10
GOREVILLE · GOREVILLE · 1,068 served · purchased surface water10
GENESEO HILLS SUBDIVISION · Henry County · 500 served · groundwater10
SIBLEY · SIBLEY · 245 served · groundwater10
ILCV CANDLE MHP, LLC · COAL VALLEY · 148 served · purchased groundwater10
VALLEY VIEW SUBDIVISION (WOODFORD) · Woodford County · 100 served · purchased groundwater10
ELM OAK MUTUAL WATER SYSTEM · Lake County · 50 served · groundwater10
CRAB ORCHARD ESTATES · CARBONDALE · 238 served · purchased surface water9
MOUNT ERIE · MOUNT ERIE · 128 served · purchased surface water9
VALLEY VIEW MANOR · Champaign County · 120 served · groundwater9
PHIL-AIRE ESTATES MHP · ROCKTON · 80 served · groundwater9
CASEY · CASEY · 3,274 served · purchased groundwater8
LONGVIEW · LONG VIEW · 146 served · groundwater8
CROPSEY MUTUAL WATER ASSOCIATION · McLean County · 65 served · groundwater8
HUNTLEY · HUNTLEY · 28,495 served · groundwater7
DWIGHT · DWIGHT · 4,400 served · groundwater7
ARCOLA · ARCOLA · 2,927 served · purchased groundwater7
PRAIRIE PATH WATER COMPANY-GALENA · Jo Daviess County · 2,294 served · groundwater7
JONESBORO · JONESBORO · 1,799 served · purchased groundwater7
MAPLE PARK · MAPLE PARK · 1,484 served · groundwater7
WINDSOR · WINDSOR · 1,200 served · purchased surface water7
KINGSTON · KINGSTON · 1,160 served · groundwater7
STATEVILLE CORRECTIONAL CENTER · JOLIET · 992 served · purchased groundwater7
NOBLE · NOBLE · 805 served · purchased surface water7
BROWNSTOWN · BROWNSTOWN · 740 served · purchased groundwater7
SAWYERVILLE · SAWYERVILLE · 578 served · purchased surface water7
WEST LIBERTY-DUNDAS WATER DISTRICT · Richland County · 563 served · purchased surface water7
MARK · MARK · 555 served · groundwater7
BEAVERVILLE · BEAVERVILLE · 450 served · groundwater7
VILLAGE GREEN MOBILE HOME PARK · PONTOON BEACH · 188 served · purchased surface water7
JONS MHP · LaSalle County · 92 served · groundwater7
LA BELLA OF CLIFTON · CLIFTON · 55 served · groundwater7
WHEELING · WHEELING · 39,725 served · purchased surface water6
OSWEGO · OSWEGO · 38,169 served · groundwater6
PARK FOREST · PARK FOREST · 21,687 served · groundwater6
IL AMERICAN-STREATOR · STREATOR · 19,000 served · surface water6
OTTAWA · OTTAWA · 18,097 served · groundwater6
IL AMERICAN-LINCOLN · LINCOLN · 15,200 served · groundwater under surface influence6
RICHTON PARK · RICHTON PARK · 12,504 served · groundwater6
PINGREE GROVE · HAMPSHIRE · 10,365 served · groundwater6
PRINCETON · PRINCETON · 7,832 served · groundwater6
ROCK ISLAND ARSENAL, US ARMY · Rock Island County · 7,800 served · surface water6
VANDALIA · VANDALIA · 7,616 served · surface water6
VOLO · VOLO · 6,629 served · purchased surface water6
STAUNTON · STAUNTON · 5,756 served · surface water6
FREEBURG · FREEBURG · 4,707 served · purchased surface water6
FOX RIVER GROVE · FOX RIVER GROVE · 4,702 served · groundwater6
CALHOUN COUNTY RWD · Calhoun County · 4,675 served · groundwater6
WOODHAVEN · Lee County · 4,100 served · groundwater6
SMG WATER COOP · Morgan County · 3,110 served · purchased surface water6
CARTHAGE · Hancock County · 2,510 served · groundwater6
HINCKLEY · HINCKLEY · 2,006 served · groundwater6
HAMPTON · HAMPTON · 1,863 served · purchased surface water6
PRAIRIE PATH WATER COMPANY-OAKWOOD · OAKWOOD · 1,600 served · surface water6
DURAND · DURAND · 1,427 served · groundwater6
GRIDLEY · GRIDLEY · 1,411 served · groundwater6
IL AMERICAN-ROSICLARE · ROSICLARE · 1,387 served · groundwater under surface influence6
HOMER · HOMER · 1,200 served · groundwater6
CAMDEN-LITTLETON WATER COMMISSION · Schuyler County · 1,000 served · purchased groundwater6
WENONA · WENONA · 974 served · groundwater6
GOODFIELD · GOODFIELD · 936 served · groundwater6
ROSEVILLE · ROSEVILLE · 915 served · purchased groundwater6
FRANKLIN · FRANKLIN · 800 served · purchased surface water6
EVANSVILLE · EVANSVILLE · 660 served · surface water6
THOMSON · THOMSON · 580 served · groundwater6
MOUNT AUBURN · MOUNT AUBURN · 480 served · purchased groundwater6
SEYMOUR WATER DISTRICT · Champaign County · 392 served · purchased groundwater6
JOY · JOY · 377 served · groundwater6
EJ WATER-DEWEY · Champaign County · 350 served · groundwater6
ALMA · ALMA · 336 served · purchased surface water6
MAPLETON · MAPLETON · 261 served · purchased groundwater6
CISCO · CISCO · 242 served · groundwater6
WAGGONER · WAGGONER · 186 served · groundwater6
COUNTRYSIDE ESTATES MHP · LaSalle County · 158 served · groundwater6
PENFIELD PWD · Champaign County · 150 served · groundwater6
WOOD DALE ESTATES · DuPage County · 145 served · purchased surface water6
COUNTRY VIEW ESTATES SUBDIVISION · Ogle County · 125 served · groundwater6
RAINBOW LANE MHP · MACHESNEY PARK · 83 served · groundwater6
COUNTRY LANE MHP · McLean County · 50 served · groundwater6
KASKASKIA WATER DISTRICT · NEW ATHENS · 0 served · surface water6
BERWYN · BERWYN · 57,250 served · purchased surface water5
CHARLESTON · CHARLESTON · 17,286 served · surface water5
WASHINGTON COUNTY WATER COMPANY · NASHVILLE · 11,374 served · purchased surface water5
MONMOUTH · MONMOUTH · 8,902 served · groundwater5
BENTON · BENTON · 8,104 served · purchased surface water5
AQUA ILLINOIS-UNIVERSITY PARK · PK FOREST SOUTH · 7,002 served · purchased surface water5
COAL VALLEY · COAL VALLEY · 3,873 served · groundwater5
FORSYTH · FORSYTH · 3,490 served · groundwater5
SOUTH PALOS TWSP SANITARY DIST · Cook County · 2,800 served · purchased surface water5
WHITE HALL · WHITE HALL · 2,313 served · groundwater5
MITCHELLSVILLE PWD · Saline County · 1,970 served · purchased groundwater5
NEW ATHENS · NEW ATHENS · 1,970 served · purchased surface water5
MARISSA · MARISSA · 1,921 served · purchased surface water5
IL AMERICAN-MOUNT PULASKI · Logan County · 1,506 served · groundwater5
OKAWVILLE · OKAWVILLE · 1,457 served · purchased surface water5
WALNUT · WALNUT · 1,311 served · groundwater5
BLACKHAWK ESTATES LLC · Cook County · 1,238 served · groundwater5
WYANET · WYANET · 886 served · groundwater5
TILDEN · TILDEN · 740 served · purchased surface water5
LENZBURG · LENZBURG · 616 served · purchased surface water5
BROCTON · BROCTON · 288 served · groundwater5
ROCKBRIDGE · ROCKBRIDGE · 180 served · purchased groundwater5
RETZ ADDN IMPROVEMENT ASSOCIATION · LaSalle County · 168 served · purchased groundwater5
MEADOWS MENNONITE HOME · McLean County · 140 served · groundwater5
BRUSSELS · BRUSSELS · 136 served · groundwater5
EAST LYNN COMMUNITY WATER SYSTEM · Vermilion County · 112 served · groundwater5
HARMON · HARMON · 111 served · groundwater5
PRAIRIE OAKS ESTS HOMEOWNERS ASSN · COAL CITY · 107 served · groundwater5
STELLE COMMUNITY ASSN · Ford County · 100 served · groundwater5
HILLVIEW · HILLVIEW · 94 served · purchased groundwater5
CARROLL HEIGHTS UTILITIES COMPANY · Carroll County · 80 served · groundwater5
BLUFF LAKE LODGES, INC. · ANTIOCH · 24 served · groundwater5
CICERO · CICERO · 83,000 served · purchased surface water4
AQUA ILLINOIS-KANKAKEE · KANKAKEE · 80,000 served · surface water4
EJ WATER COOPERATIVE · Jasper County · 29,720 served · surface water4
WOODSTOCK · WOODSTOCK · 25,630 served · groundwater4
LOCKPORT · LOCKPORT · 23,100 served · groundwater4
SOUTH HOLLAND · SOUTH HOLLAND · 22,000 served · purchased surface water4
CREST HILL · CREST HILL · 21,169 served · groundwater4
WESTERN SPRINGS · WESTERN SPRINGS · 13,274 served · groundwater4
MINOOKA · MINOOKA · 12,800 served · groundwater4
PERU · PERU · 10,300 served · groundwater4
MURPHYSBORO · MURPHYSBORO · 10,241 served · purchased surface water4
STEGER · STEGER · 9,700 served · groundwater4
IL AMERICAN-JERSEYVILLE · JERSEYVILLE · 8,412 served · groundwater4
PRAIRIE PATH WATER CO-WHISPERING HILLS · McHenry County · 8,300 served · groundwater4
MOUNT CARMEL · MOUNT CARMEL · 7,015 served · groundwater under surface influence4
FAIRFIELD · FAIRFIELD · 6,202 served · surface water4
CREVE COEUR · Tazewell County · 4,934 served · groundwater4
WESTVILLE · WESTVILLE · 3,917 served · purchased surface water4
PLEASANT VALLEY PWD · Peoria County · 3,783 served · groundwater4
FAIRBURY · FAIRBURY · 3,633 served · groundwater4
JOHNSTON CITY · JOHNSTON CITY · 3,509 served · purchased surface water4
SOUTH JACKSONVILLE · SOUTH JACKSONVILLE · 3,501 served · groundwater4
OREGON · OREGON · 3,449 served · groundwater4
GALENA · GALENA · 3,308 served · groundwater4
AQUA ILLINOIS-HAWTHORN WOODS · Lake County · 3,065 served · groundwater4
MOULTRIE COUNTY RWD · Moultrie County · 2,600 served · purchased surface water4
CLAYTON-CAMP POINT WATER COMMISSION · Adams County · 2,470 served · groundwater4
EGYPTIAN WATER COMPANY · Randolph County · 2,330 served · purchased surface water4
LIMESTONE-WALTERS PWD · Peoria County · 2,023 served · purchased groundwater4
BEMENT · BEMENT · 1,661 served · groundwater4
NORTH UTICA · NORTH UTICA · 1,323 served · groundwater4
HILLCREST · HILLCREST · 1,224 served · groundwater4
LOUISVILLE · LOUISVILLE · 1,201 served · purchased surface water4
MARTINSVILLE · MARTINSVILLE · 1,200 served · purchased groundwater4
PRAIRIE PATH WATER COMPANY-FERSON CREEK · Kane County · 1,134 served · groundwater4
ELKVILLE · ELKVILLE · 1,068 served · purchased surface water4
HIGHWAY 37 NORTH PWD · Williamson County · 1,065 served · purchased surface water4
LIBERTY PARK HOMEOWNERS ASSOCIATION · DuPage County · 950 served · groundwater4
WILLOW LAKE ESTATES MHP · ELGIN · 920 served · purchased surface water4
NEW MEMPHIS PWD · Clinton County · 805 served · purchased surface water4
BRACEVILLE · BRACEVILLE · 800 served · groundwater4
PRAIRIE DU ROCHER · PRAIRIE DU ROCHR · 759 served · purchased groundwater4
TISKILWA · TISKILWA · 740 served · groundwater4
ASHKUM · ASHKUM · 724 served · groundwater4
LAMOILLE · LA MOILLE · 660 served · groundwater4
CHAPIN · CHAPIN · 658 served4
WILLIAMSFIELD · WILLIAMSFIELD · 647 served · groundwater4
DEER CREEK · DEER CREEK · 647 served · groundwater4
CORDOVA · CORDOVA · 640 served · groundwater4
PRAIRIE PATH WATER COMPANY-CLARENDON · DuPage County · 625 served · groundwater4
ELKHART · Logan County · 565 served · groundwater4
HILL CITY WATER DISTRICT · Franklin County · 543 served · purchased surface water4
CHOATE MHC · ANNA · 533 served · purchased groundwater4
MISSISSIPPI MANUFACTURED HOME COMMUNITY · EAST MOLINE · 503 served · purchased surface water4
WOODLAND A AND B MHP · Rock Island County · 490 served · groundwater4
LAKE THUNDERBIRD SUBDIVSION · Putnam County · 450 served · groundwater4
BENSON · BENSON · 401 served · groundwater4
HENDERSON · HENDERSON · 375 served · purchased groundwater4
SHANGRI-LA MHP · Ogle County · 370 served · groundwater4
MEADOWS OF BLOOMINGTON MHP · McLean County · 343 served · purchased surface water4
VARNA · VARNA · 342 served · groundwater4
MIDDLETOWN · MIDDLETOWN · 330 served · groundwater4
EASTON · EASTON · 325 served · groundwater4
FSH WATER COMMISSION · SMITHTON · 313 served · purchased surface water4
LEE · LEE · 313 served · groundwater4
GLEN EDEN ESTATES HOMEOWNERS ASSOCIATION · Cook County · 312 served · purchased surface water4
BIGGSVILLE · BIGGSVILLE · 273 served · purchased groundwater4
ELLIOTT · ELLIOTT · 269 served · groundwater4
SC EDGEWOOD TERRACE PROPERTY, LLC · Tazewell County · 248 served · purchased groundwater4
HAZELWOOD HEIGHTS SUBDIVISION · Henry County · 235 served · groundwater4
OMAHA · OMAHA · 234 served · purchased groundwater4
SPIN LAKE HOMEOWNERS ASSOCIATION, INC. · McLean County · 200 served · groundwater4
KEMPTON · KEMPTON · 177 served · groundwater4
DE WITT · DE WITT · 175 served · groundwater4
PRAIRIE ROAD PUMP CORPORATION · ROCKFORD · 150 served · groundwater4
CAMP GROVE · Marshall County · 146 served · groundwater4
PARK RIDGE MHC · SPRINGFIELD · 116 served · purchased surface water4
CRISWELL COURT MHP · JOLIET · 94 served · groundwater4
EDGEWOOD MOBILE HOME COURT (MHC) · SPRINGFIELD · 92 served · purchased surface water4
BLACKHAWK COLLEGE EAST CAMPUS · Henry County · 80 served · groundwater4
HOLLOWAYVILLE · HOLLOWAYVILLE · 36 served · purchased groundwater4
SOUTH ELGIN · SOUTH ELGIN · 23,648 served · groundwater3
BELLWOOD · BELLWOOD · 19,156 served · purchased surface water3
ROCKTON · ROCKTON · 7,685 served · groundwater3
SANGAMON VALLEY PWD · Champaign County · 5,300 served · groundwater3
WONDER LAKE · McHenry County · 3,870 served · groundwater3
T-L RURAL WATER DISTRICT · Peoria County · 2,243 served · purchased groundwater3
GRANTFORK · GRANTFORK · 1,766 served · purchased surface water3
ORION · ORION · 1,754 served · groundwater3
BENLD · BENLD · 1,612 served · purchased surface water3
NEW BERLIN · Sangamon County · 1,380 served · purchased groundwater3
BOYLESTON WATERWORKS CORP · FAIRFIELD · 948 served · purchased surface water3
EJ WATER-WATSON · WATSON · 754 served · purchased surface water3
DORCHESTER · DORCHESTER · 540 served · purchased surface water3
WILSONVILLE · WILSONVILLE · 536 served · purchased surface water3
MALDEN · MALDEN · 318 served · groundwater3
MOUNT CLARE · MOUNT CLARE · 311 served · purchased surface water3
ALVIN · ALVAN · 270 served · groundwater3
AIR VIEW MHP · Rock Island County · 200 served · groundwater3
VALLEY VIEW SUBDIVISION (DEKALB) · DeKalb County · 120 served · groundwater3
TIMBER BROOK ESTATES · Henry County · 120 served · groundwater3
BROWNING · BROWNING · 117 served · groundwater3
STORYBOOK HIGHLANDS · Kendall County · 100 served · groundwater3
NORTHGATE ESTATES MHP · SOUTH BELOIT · 100 served · purchased groundwater3
SKYVIEW ESTATES · Kankakee County · 56 served · groundwater3
ACORN ACRES MHP · OLNEY · 52 served · purchased surface water3
LA PRAIRIE · LA PRAIRIE · 47 served · purchased groundwater3
STOCKTON · STOCKTON · 1,728 served · groundwater2
AQUA ILLINOIS-EASTWOOD MANOR · McHenry County · 728 served · groundwater2
TANNERON BAY HOMEOWNERS ASSOCIATION · Lake County · 256 served · groundwater2
CALHOUN · CALHOUN · 172 served · groundwater2
HONEYCUTT HILL MHP LLC · MORRISON · 75 served · groundwater2
JOLIET · JOLIET · 160,000 served · groundwater1
CHICAGO · Cook County · 2,721,308 served · surface waternone on record
AURORA · AURORA · 183,000 served · surface waternone on record
NAPERVILLE · NAPERVILLE · 156,406 served · purchased surface waternone on record
IL AMERICAN-CHAMPAIGN · CHAMPAIGN · 150,000 served · groundwaternone on record
ROCKFORD · ROCKFORD · 147,051 served · groundwaternone on record
IL AMERICAN-PEORIA · PEORIA · 137,575 served · surface waternone on record
IL AMERICAN-EAST ST LOUIS · EAST ST LOUIS · 131,368 served · surface waternone on record
SPRINGFIELD · SPRINGFIELD · 117,444 served · surface waternone on record
ELGIN · ELGIN · 114,797 served · surface waternone on record
WAUKEGAN · WAUKEGAN · 87,149 served · surface waternone on record
BLOOMINGTON · BLOOMINGTON · 77,610 served · surface waternone on record
DECATUR · DECATUR · 76,122 served · surface waternone on record
SCHAUMBURG · SCHAUMBURG · 75,750 served · purchased surface waternone on record
EVANSTON · EVANSTON · 74,486 served · surface waternone on record
IL AMERICAN-WEST SUBURBAN · BOLINGBROOK · 73,978 served · purchased surface waternone on record
ARLINGTON HEIGHTS · ARLINGTON HEIGHTS · 73,320 served · purchased surface waternone on record
PALATINE · PALATINE · 70,875 served · purchased surface waternone on record
SKOKIE · SKOKIE · 66,422 served · purchased surface waternone on record
DES PLAINES · DES PLAINES · 60,675 served · purchased surface waternone on record
OAK LAWN · OAK LAWN · 58,362 served · purchased surface waternone on record
ORLAND PARK · ORLAND PARK · 58,020 served · purchased surface waternone on record
TINLEY PARK · TINLEY PARK · 56,703 served · purchased surface waternone on record
OAK PARK · OAK PARK · 54,583 served · purchased surface waternone on record
WHEATON · WHEATON · 53,970 served · purchased surface waternone on record
NORMAL · NORMAL · 52,736 served · groundwaternone on record
ROMEOVILLE · ROMEOVILLE · 50,458 served · groundwaternone on record
HOFFMAN ESTATES · HOFFMAN ESTATES · 50,179 served · purchased surface waternone on record
PLAINFIELD · PLAINFIELD · 50,000 served · purchased surface waternone on record
DOWNERS GROVE · DOWNERS GROVE · 49,425 served · purchased surface waternone on record
GLENVIEW · GLENVIEW · 47,856 served · purchased surface waternone on record
O FALLON · O FALLON · 46,603 served · purchased surface waternone on record
IL AMERICAN-ALTON · ALTON · 46,127 served · surface waternone on record
ELMHURST · ELMHURST · 45,000 served · purchased surface waternone on record
MOLINE · MOLINE · 44,500 served · surface waternone on record
LOMBARD · LOMBARD · 44,476 served · purchased surface waternone on record
BUFFALO GROVE · BUFFALO GROVE · 43,212 served · purchased surface waternone on record
QUINCY · QUINCY · 42,000 served · surface waternone on record
BARTLETT · BARTLETT · 41,500 served · purchased surface waternone on record
MOUNT PROSPECT · MOUNT PROSPECT · 41,000 served · purchased surface waternone on record
CRYSTAL LAKE · CRYSTAL LAKE · 40,661 served · groundwaternone on record
DEKALB · DE KALB · 40,290 served · groundwaternone on record
CAROL STREAM · CAROL STREAM · 39,854 served · purchased surface waternone on record
PARK RIDGE · PARK RIDGE · 39,800 served · purchased surface waternone on record
STREAMWOOD · STREAMWOOD · 39,577 served · purchased surface waternone on record
ROCK ISLAND · ROCK ISLAND · 39,018 served · surface waternone on record
ADDISON · ADDISON · 38,017 served · purchased surface waternone on record
CARPENTERSVILLE · CARPENTERSVILLE · 37,983 served · groundwaternone on record
HANOVER PARK · HANOVER PARK · 37,470 served · purchased surface waternone on record
NORTH PARK PWD · MACHESNEY PARK · 35,580 served · groundwaternone on record
NORTHBROOK · NORTHBROOK · 34,407 served · surface waternone on record
IL AMERICAN-GRANITE CITY · GRANITE CITY · 33,572 served · surface waternone on record
WOODRIDGE · WOODRIDGE · 33,566 served · purchased surface waternone on record
VERNON HILLS - LAKE CO PW · VERNON HILLS · 33,207 served · purchased surface waternone on record
GLENDALE HEIGHTS · GLENDALE HEIGHTS · 33,176 served · purchased surface waternone on record
Source: U.S. EPA Safe Drinking Water Information System (SDWIS). "Health-based" counts maximum-contaminant-level, treatment-technique and maximum-residual-disinfectant-level violations recorded since 2015. A violation on record — especially a resolved one — is not a statement about water quality today; contact the water system or your state drinking-water program for current information.