Know Your Environment. Protect Your Health.

STATE

Illinois

CONTAMINANTS

114

serves

12,260,000

data

2013-2024

UTILITIES

1,773

Overview

EWG's drinking water quality report for Illinois shows results of tests conducted by the water utilities in Illinois and provided to EWG by the Illinois Environmental Protection Agency.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

Large utilities in Illinois

Below are utilities in Illinois serving over 10,000 people, listed alphabetically.

UtilityLocationPeople Served
AddisonAddison, IL38,017
AlgonquinAlgonquin, IL29,700
AlsipAlsip, IL18,880
AntiochAntioch, IL14,175
Aqua Illinois - KankakeeKankakee, IL80,275
Aqua Illinois - North Maine UtilitiesKankakee, IL30,043
Aqua Illinois-Vermilion CountyKankakee, IL38,000
Arlington HeightsArlington Heights, IL79,000
AuroraAurora, IL200,000
BarringtonBarrington, IL10,327
BartlettBartlett, IL41,103
BataviaBatavia, IL26,098
BellwoodBellwood, IL19,156
BelvidereBelvidere, IL25,070
BensenvilleBensenville, IL18,044
BerwynBerwyn, IL58,000
BethaltoBethalto, IL19,121
BloomingdaleBloomingdale, IL22,423
BloomingtonBloomington, IL77,610
Blue IslandBlue Island, IL23,463
BridgeviewBridgeview, IL16,446
BrookfieldBrookfield, IL18,978
Burr RidgeBurr Ridge, IL11,192
Cahokia HeightsCahokia Heights, IL15,250
Calumet CityCalumet City, IL37,000
CantonCanton, IL14,700
CarbondaleCarbondale, IL22,107
Carol StreamCarol Stream, IL39,447
CarpentersvilleCarpentersville, IL37,983
CaryCary, IL18,271
CaseyvilleCaseyville, IL17,000
CentraliaCentralia, IL12,182
ChannahonChannahon, IL12,833
CharlestonCharleston, IL16,400
ChathamChatham, IL16,544
Chicago HeightsChicago Heights, IL30,300
Chicago RidgeChicago Ridge, IL14,130
CiceroCicero, IL83,000
City of ChicagoChicago, IL2,746,388
CollinsvilleCollinsville, IL29,500
ColumbiaColumbia, IL11,638
Country Club HillsCountry Club Hills, IL16,511
Crest HillCrest Hill, IL21,169
CrestwoodCrestwood, IL10,950
Crystal LakeCrystal Lake, IL40,635
DarienDarien, IL22,061
De KalbDekalb, IL45,000
DecaturDecatur, IL76,122
DeerfieldDeerfield, IL19,196
Des PlainesDes Plaines, IL60,675
DixonDixon, IL15,433
DoltonDolton, IL21,426
Downers GroveDowners Grove, IL49,057
E J Water CorpDieterich, IL23,944
East MolineEast Moline, IL20,645
East PeoriaEast Peoria, IL22,284
EdwardsvilleEdwardsville, IL26,808
EffinghamEffingham, IL12,328
ElginElgin, IL113,911
Elk Grove VillageElk Grove Village, IL34,700
ElmhurstElmhurst, IL46,387
Elmwood ParkElmwood Park, IL25,000
EvanstonEvanston, IL75,570
Evergreen ParkEvergreen Park, IL19,943
Forest ParkForest Park, IL14,339
Fox LakeIngleside, IL11,780
FrankfortFrankfort, IL20,296
Franklin ParkFranklin Park, IL18,333
FreeportFreeport, IL23,930
GalesburgGalesburg, IL31,745
GenevaGeneva, IL21,247
Glen CarbonGlen Carbon, IL12,943
Glen EllynGlen Ellyn, IL28,850
Glendale HeightsGlendale Heights, IL34,208
GlenviewGlenview, IL47,856
GrayslakeGrayslake, IL21,248
Great Lakes Naval Training StationGreat Lakes, IL23,000
GurneeGurnee, IL30,706
Hanover ParkHanover Park, IL37,973
HarveyHarvey, IL25,000
Hazel CrestHazel Crest, IL13,098
HerrinHerrin, IL12,872
Hickory HillsHickory Hills, IL14,049
HighlandHighland, IL10,919
Highland ParkHighland Park, IL29,763
HinsdaleHinsdale, IL17,940
Hoffman EstatesHoffman Estates, IL52,271
HomewoodHomewood, IL19,463
HuntleyHuntley, IL27,000
IL American-lake Water CompanyWoodridge, IL123,148
IL American - AltonAlton, IL46,127
IL American - ChampaignUrbana, IL142,250
IL American - East St. LouisBelleville, IL139,879
IL American - Homer TownshipWoodridge, IL24,543
IL American - PekinPeoria, IL35,000
IL American - PeoriaPeoria, IL121,478
IL American-Chicago SuburbanWoodridge, IL11,713
IL American-granite CityBelleville, IL37,639
IL American-LincolnPeoria, IL15,200
IL American-SterlingUrbana, IL15,000
IL American-StreatorUrbana, IL19,000
IL American-West SuburbanWoodridge, IL73,978
Illinois American-PontiacUrbana, IL11,864
JacksonvilleJacksonville, IL19,446
Jersey RWCJerseyville, IL12,750
JolietJoliet, IL148,693
Justice-Willow Springs Water CommssionJustice, IL18,457
KewaneeKewanee, IL12,547
La GrangeLa Grange, IL16,200
La Grange ParkLagrange Park, IL13,579
Lake ForestLake Forest, IL19,367
Lake In The HillsLake In The Hills, IL29,228
Lake of Egypt PWDMarion, IL11,368
Lake ZurichLake Zurich, IL20,022
LansingLansing, IL27,657
LemontLemont, IL17,500
Leyden Twsp Water DistrictFranklin Park, IL16,000
LibertyvilleLibertyville, IL20,500
LincolnwoodLincolonwood, IL12,394
LindenhurstLindenhurst, IL14,467
LisleLisle, IL24,233
LockportLockport, IL19,887
LombardLombard, IL44,476
Loves ParkLoves Park, IL24,000
LyonsLyons, IL10,775
MacombMacomb, IL15,052
MarionMarion, IL16,855
MarkhamMarkham, IL12,500
MaryvilleMaryville, IL10,150
MattesonMatteson, IL21,000
MattoonMattoon, IL19,500
MaywoodMaywood, IL24,090
Mc HenryMchenry, IL22,335
Melrose ParkMelrose Park, IL24,206
MidlothianMidlothian, IL14,819
MinookaMinooka, IL12,800
MokenaMokena, IL19,887
MolineMoline, IL44,500
MontgomeryMontgomery, IL28,956
MorrisMorris, IL15,335
MortonMorton, IL17,111
Morton GroveMorton Grove, IL25,297
Mount ProspectMount Prospect, IL41,492
Mount VernonMt. Vernon, IL15,793
MundeleinMundelein, IL31,500
MurphysboroMurphysboro, IL10,740
NapervilleNaperville, IL155,156
New LenoxNew Lenox, IL27,690
NilesNiles, IL28,938
NormalNormal, IL45,841
NorridgeNorridge, IL14,281
North AuroraNorth Aurora, IL18,350
North ChicagoNorth Chicago, IL16,813
North LakeNorth Lake, IL12,323
North Park PWDMachesney Park, IL35,580
NorthbrookNorthbrook, IL34,407
O FallonO'fallon, IL46,603
Oak ForestOak Forest, IL26,547
Oak LawnOak Lawn, IL55,022
Oak ParkOak Park, IL54,583
Orland ParkOrland Park, IL58,862
OswegoOswego, IL38,169
OttawaOttawa, IL19,000
PalatinePalatine, IL70,875
Palos HeightsPalos Heights, IL15,500
Palos HillsPalos Hills, IL17,484
Park ForestPark Forest, IL21,975
Park RidgePark Ridge, IL37,457
PeruPeru, IL10,300
Pingree GrovePingree Grove, IL10,365
PlainfieldPlainfield, IL44,762
PlanoPlano, IL12,191
QuincyQuincy, IL45,000
RantoulRantoul, IL13,000
Richton ParkRichton Park, IL12,500
River ForestRiver Forest, IL11,172
River GroveRiver Grove, IL10,093
RiverdaleRiverdale, IL13,549
Robinson-palestine Water CommissionRobinson, IL11,331
Rock IslandRock Island, IL39,018
RockfordRockford, IL147,051
Rolling MeadowsRolling Meadows, IL24,099
RomeovilleRomeoville, IL50,244
RoselleRoselle, IL22,897
Round LakeRound Lake, IL18,278
Round Lake BeachRound Lake Beach, IL28,845
SchaumburgSchaumburg, IL74,550
Schiller ParkSchiller Park, IL11,515
ShorewoodShorewood, IL17,495
SkokieSkokie, IL62,700
South ElginSouth Elgin, IL22,549
South HollandSouth Holland, IL22,500
South Stickny SDBurbank, IL30,000
SpringfieldSpringfield, IL117,428
St CharlesSt. Charles, IL33,103
StreamwoodStreamwood, IL39,577
Sugar GroveYorkville, IL11,243
SummitSummit, IL10,875
SycamoreSycamore, IL18,500
TaylorvilleTaylorville, IL16,396
Tinley ParkTinley Park, IL56,703
TroyTroy, IL16,800
University of Illinois - ChampaignChampaign, IL13,000
Vernon HillsLibertyville, IL34,617
Villa ParkVilla Park, IL22,263
Village of Buffalo GroveBuffalo Grove, IL44,128
WarrenvilleWarrenville, IL12,709
WashingtonWashington, IL14,793
Washington County Water CompanyNashville, IL11,374
WaterlooWaterloo, IL10,190
WaucondaWauconda, IL14,084
WaukeganWaukegan, IL87,157
West ChicagoWest Chicago, IL25,166
WestchesterWestchester, IL16,700
Western SpringsWestern Springs, IL13,274
WestmontWestmont, IL25,000
WheatonWheaton, IL52,894
WheelingWheeling, IL39,137
Wildwood SubdivisionLibertyville, IL14,832
WilmetteWilmette, IL27,087
WinnetkaDeerfield, IL13,037
Wood DaleWood Dale, IL14,012
Wood RiverWood River, IL10,464
WoodridgeWoodridge, IL35,278
WoodstockWoodstock, IL25,630
WorthWorth, IL10,970
YorkvilleYorkville, IL23,000
ZionZion, IL24,413

Utilities that accumulated/accrued the most violation points as of July 2021 to June 2024 in Illinois

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople ServedViolation Points
Country Acres Mobile Home Park (la Salle County)Denver, IL22270
Acorn Acres Mobile Home ParkStevens Point, IL5261
Land and Water AssociationOttawa, IL10046
Cortland Corners Mobile Home ParkMalta, IL25035
Criswell Court Mobile Home ParkJoliet, IL9423
Apple Creek Water Co-opJacksonville, IL94922
SecorSecor, IL40020
Jasper Waterworks CorporationFairfield, IL1,48320
IlliopolisIlliopolis, IL1,04620
AnnaAnna, IL5,02720
Fields Hill Improvement AssociationOttawa, IL31216
Ej Water-sangchrisDieterich, IL88615
MacombMacomb, IL15,05215
ReddickPeru, IL19615
SilvisSilvis, IL7,80015
Meadows Mennonite HomeChenoa, IL14013
WestfieldWestfield, IL67813
Lakeshore Estates Mobile Home ParkShiloh, IL38712
Harvard Hills Water CorporationWashington, IL25011
Lake ShannonReddick, IL50010
Lick Creek Public Water DistrictBuncombe, IL2,19110
Cropsey Mutual Water AssociationLincoln, IL6510
Mount ZionMount Zion, IL5,83310
PinckneyvillePinckneyville, IL6,35010
Meadowbrook Mh Community, LlcFarmington Hills, IL22810
IndustryIndustry, IL54010
ChenoaChenoa, IL1,78510
RockdaleRockdale, IL1,8889
Silvis Heights Water CorporationSilvis, IL1,4607
Beckwith Community AssociationCrete, IL757

Large utilities that accumulated/accrued the most violation points as of July 2021 to June 2024 in Illinois

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople ServedViolation Points
MacombMacomb, IL15,05215
Lake of Egypt PWDMarion, IL11,3685
CarbondaleCarbondale, IL22,1075
North ChicagoNorth Chicago, IL16,8135
OttawaOttawa, IL19,0002
DoltonDolton, IL21,4262
Lake ZurichLake Zurich, IL20,0222
DeerfieldDeerfield, IL19,1962
CantonCanton, IL14,7002
ElginElgin, IL113,9111
CiceroCicero, IL83,0001
SkokieSkokie, IL62,7001
Aqua Illinois-Vermilion CountyKankakee, IL38,0001
WaukeganWaukegan, IL87,1571
Wood RiverWood River, IL10,4641
Calumet CityCalumet City, IL37,0001
Morton GroveMorton Grove, IL25,2971
ZionZion, IL24,4131
Blue IslandBlue Island, IL23,4631
Crest HillCrest Hill, IL21,1691
East MolineEast Moline, IL20,6451
CaseyvilleCaseyville, IL17,0001
Richton ParkRichton Park, IL12,5001
MarkhamMarkham, IL12,5001

Contaminants found in Illinois above health guidelines

Found above health guidelines Found
Contaminant # of Utilities People Served # of Utilities People Served
Total trihalomethanes (TTHMs)1,64012,002,8281,64312,009,744
Haloacetic acids (HAA5)1,62511,978,7021,63112,129,944
Bromodichloromethane1,45211,807,2061,45211,807,206
Chloroform1,51211,782,2731,56511,866,048
Dichloroacetic acid1,47611,677,4661,52511,962,230
Dibromochloromethane1,32611,468,1521,35611,552,447
Trichloroacetic acid1,27211,246,7281,29011,383,796
Dibromoacetic acid1,08410,417,4041,12110,749,323
Haloacetic acids (HAA9)5059,971,9335079,990,018
Chromium (hexavalent)3908,968,3154599,588,922
Radium, combined (-226 & -228)1,0447,863,8901,0727,928,368
Nitrate6506,971,5531,1368,432,852
Nitrate & nitrite5006,113,1737746,833,607
Arsenic6732,975,2196732,975,219
Perfluorooctanoic acid (PFOA)1411,996,9361442,088,827
Perfluorooctane sulfonate (PFOS)1411,593,5271612,019,947
Bromoform3791,514,0167885,362,146
Perfluorohexane sulfonate (PFHXS)831,042,124831,042,124
Chlorite80347,86582355,227
1,4-Dioxane9312,7091372,522,860
Bromate20285,59420285,594
Tetrachloroethylene (perchloroethylene)7211,0877211,087
Atrazine51154,4001891,161,333
Chlorate1483,5322423,810,625
Simazine3782,75696268,759
Perfluorononanoic acid (PFNA)1080,1381080,138
Cadmium424,217424,217
Bromochloromethane116,54416273,923
Manganese1912,4971,3017,233,356
Perfluoropentane sulfonic acid (PFPeS)15,90815,908
Vinyl chloride25,61525,615
Perfluorotetradecanoic acid (PFTA)14911491
Perfluorotridecanoic acid (PFTrDA)14911491
Barium12001,3858,878,278
Thallium1100250,344
Benzo[a]pyrene160657,009

Contaminants found in Illinois above legal limits

Contaminant # of Utilities People Served

What filter type is right for you?

Water
Contaminants

view utility

Carbon Filters

Can reduce the levels of many common contaminants.

pros

  • Lower upfront cost
  • Reduced maintenance

cons

  • Does not remove all contaminants

Reverse Osmosis

Most effective at reducing contaminants.

pros

  • Most effective

cons

  • Higher upfront cost
  • Requires more maintenance
  • Wastes water

Other Considerations

Ion Exchange

Pros: Softens hard water, Reduces some contaminants

Cons: Doesn't remove all contaminants

Whole-House Filters

Pros: Useful for reducing radiologicals and TCE

Cons: Expensive to install and maintain, Risk of bacterial contamination

Distillation

Pros: Removes heavy metals and harmful microbes

Cons: Does not reduce most contaminants

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