Lead pipes in Illinois

Illinois's 1,788 community water systems reported 609,945 lead and 57,405 galvanized-requiring-replacement service lines, plus 514,406 of unknown material. That ranks #1 among states for confirmed lead lines.

609,945Lead

57,405Galvanized, replace

514,406Unknown

397Systems with lead

Lead 15%
Galvanized (replace) 1.4%
Unknown 13%
Non-lead 70%

17% of the service lines Illinois utilities reported are lead or galvanized requiring replacement, well above the national share of 3.1%. 13% are still unidentified (national: 21%). The largest counts are in Chicago (360,857), Aurora (16,063), Rockford (15,328). 54 systems haven't reported counts yet.

Since 2025 Q1, reported lead and galvanized lines in Illinois went from 475,618 to 667,350 (up 191,732). See which systems made the most progress.

Systems with confirmed lead lines (397)

Water system	Lead	Galv.	Unknown	% lead	People
ChicagoCook County	350,531	10,326	39,427	74%	2,721,308
AuroraAurora	16,063	0	16	32%	183,000
RockfordRockford	14,240	1,088	28,598	28%	147,051
CiceroCicero	13,037	2	1,148	87%	83,000
IL American-PeoriaPeoria	11,000	442	24,303	18%	137,575
BerwynBerwyn	10,527	301	174	80%	57,250
EvanstonEvanston	9,198	270	0	65%	74,486
ElginElgin	8,221	1	1,465	24%	114,797
Oak ParkOak Park	6,935	714	1,222	61%	54,583
WaukeganWaukegan	7,260	62	686	35%	87,149
DecaturDecatur	0	6,535	12	21%	76,122
SkokieSkokie	6,222	127	8,910	36%	66,422
Evergreen ParkEvergreen Park	5,933	48	0	84%	19,943
Elmwood ParkElmwood Park	5,825	0	0	91%	25,000
BloomingtonBloomington	5,529	2	5,482	17%	79,000
QuincyQuincy	5,223	33	70	29%	42,000
LansingLansing	5,186	2	56	70%	29,076
MaywoodMaywood	5,058	0	0	80%	24,090
MolineMoline	3,859	873	2,416	28%	44,500
Calumet CityCalumet City	4,122	0	1,224	42%	37,000
JacksonvilleJacksonville	3,391	525	1	50%	19,903
Arlington HeightsArlington Heights	3,832	0	51	2.2%	73,320
HomewoodHomewood	3,753	6	593	55%	19,463
CreteCrete	573	2,901	181	53%	8,386
La GrangeLa Grange	3,400	0	457	45%	16,200
WestchesterWestchester	3,399	0	26	48%	16,241
Park RidgePark Ridge	3,121	0	5,530	25%	39,800
Morton GroveMorton Grove	3,108	0	0	38%	25,297
Des PlainesDes Plaines	1,497	1,578	5,634	18%	60,675
Chicago HeightsChicago Heights	2,794	18	6,477	29%	26,184
Oak LawnOak Lawn	2,209	497	47	16%	58,362
Forest ParkForest Park	2,548	0	0	75%	14,340
IL American-PekinPekin	36	2,484	5,668	16%	31,731
DoltonDolton	2,357	1	4,625	30%	20,510
Franklin ParkFranklin Park	2,340	5	2,724	40%	18,467
SpringfieldSpringfield	991	1,261	6,949	4.1%	117,444
Calumet ParkCalumet Park	2,230	1	3	93%	8,442
LombardLombard	1,335	877	0	14%	44,476
Aqua Illinois-KankakeeKankakee	311	1,895	4,304	6.8%	80,000
WilmetteWilmette	1,936	189	219	24%	27,650
MetropolisMetropolis	16	1,997	709	66%	6,309
BrookfieldBrookfield	1,900	46	531	29%	18,776
AntiochAntioch	1,910	0	0	28%	14,175
River GroveRiver Grove	1,627	218	13	67%	10,282
Highland ParkHighland Park	1,740	33	1	17%	30,176
IL American-ChampaignChampaign	5	1,723	14,962	2.8%	150,000
SummitSummit	1,259	232	209	59%	11,161
PanaPana	1,485	6	4	58%	5,800
Downers GroveDowners Grove	1,285	181	1,330	8.6%	49,425
MorrisMorris	1,435	12	182	27%	14,775
NilesNiles	1,399	0	5,789	16%	29,350
Hazel CrestHazel Crest	1,389	7	5	30%	13,792
RobbinsRobbins	1,303	29	293	72%	5,415
South HollandSouth Holland	1,264	46	271	15%	22,000
HarvardHarvard	1,304	1	718	46%	9,469
MattoonMattoon	0	1,257	2,006	11%	19,500
BellwoodBellwood	1,257	0	930	43%	19,156
MarkhamMarkham	1,239	0	149	27%	12,500
KewaneeKewanee	1,230	0	1	23%	12,509
DuquoinDu Quoin	1,228	0	1,125	34%	7,169
AnnaAnna	1,218	0	219	59%	4,910
AnnawanAnnawan	1,218	0	219	59%	843
ElmhurstElmhurst	1,201	4	0	8.0%	45,000
RiversideRiverside	1,114	27	157	38%	9,298
PosenPosen	1,121	1	474	64%	5,331
IL American-East St LouisEast St Louis	749	351	34,431	1.5%	131,368
LincolnwoodLincolnwood	1,097	0	0	26%	13,463
WinnetkaWinnetka	1,083	0	0	24%	12,475
LitchfieldMontgomery County	20	1,036	0	31%	6,648
WoodstockWoodstock	201	822	565	11%	25,630
BroadviewBroadview	951	0	1,635	33%	7,847
CantonCanton	816	121	1,935	16%	16,748
St CharlesSaint Charles	812	114	3,703	7.1%	33,081
BelvidereBelvidere	247	630	3,348	11%	25,339
La Grange ParkLa Grange Park	708	144	529	21%	13,011
North ChicagoNorth Chicago	849	0	4,804	15%	16,813
HavanaHavana	835	9	371	55%	2,963
StegerSteger	831	3	0	32%	9,700
South JacksonvilleSouth Jacksonville	823	7	0	55%	3,501
IL American-Granite CityGranite City	697	130	12,306	3.9%	33,572
River ForestRiver Forest	770	46	1,401	26%	11,717
Mount VernonMount Vernon	46	762	31	11%	15,793
West ChicagoWest Chicago	436	344	0	12%	25,166
Blue IslandBlue Island	778	0	4,540	14%	21,494
South Chicago HeightsSouth Chicago Heights	760	5	150	50%	3,924
CarrolltonCarrollton	58	705	0	63%	2,513
Melrose ParkMelrose Park	744	0	2,326	15%	24,206
Mount ProspectMount Prospect	700	27	65	6.2%	41,000
MacombMacomb	686	38	1,685	13%	15,051
BurnhamBurnham	693	18	356	59%	3,989
IL American-PontiacPontiac	181	502	1,663	15%	11,864
LyonsLyons	602	0	28	22%	10,304
Glen EllynGlen Ellyn	435	150	239	6.6%	28,500
MattesonMatteson	576	4	0	8.3%	18,293
BensenvilleBensenville	573	0	0	12%	18,537
MidlothianMidlothian	538	30	2,880	12%	14,819
Fox River GroveFox River Grove	528	35	0	35%	4,702
HenryHenry	276	269	133	33%	2,230
PalatinePalatine	280	261	7	2.7%	70,875
MonmouthMonmouth	505	35	2,418	15%	8,902

Showing the 100 with the most. All Illinois water systems

No confirmed lead, but unknown lines remain (163)

Water system	Unknown	% lead	People
BentonBenton	3,756	0%	8,104
ParisParis	3,532	0%	9,100
HighlandHighland	3,194	0%	10,674
MurphysboroMurphysboro	2,955	0%	10,241
ChathamChatham	2,934	0%	16,423
HarrisburgHarrisburg	1,975	0%	8,524
PittsfieldPittsfield	1,933	0%	4,697
IL American-Lake HolidayLasalle County	1,906	0%	4,750
PinckneyvillePinckneyville	1,782	0%	5,804
WillowbrookWillowbrook	1,516	0%	9,000
LebanonLebanon	1,423	0%	4,714
Crystal LakeCrystal Lake	1,422	0%	40,661
DarienDarien	1,407	0%	21,751
IL American-Whispering HillsMcHenry County	1,392	0%	8,300
GeorgetownGeorgetown	1,380	0%	4,200
Greene County RWDGreene County	1,163	0%	3,786
BraidwoodBraidwood	1,159	0%	6,194
EdwardsvilleEdwardsville	1,118	0%	26,808
ElwoodElwood	1,103	0%	2,229
Fort Massac PWDJoppa	978	0%	6,360
ProphetstownProphetstown	965	0%	1,946
FreeportFreeport	901	0%	23,930
CatlinCatlin	886	0%	2,380
MoundsMounds	869	0%	1,011
St JacobSaint Jacob	814	0%	2,008
DawsonDawson	778	0%	2,375
Aqua Illinois-Timber RidgeMatteson	767	0%	2,322
RoyaltonRoyalton	701	0%	1,118
Mitchellsville PWDSaline County	593	0%	1,970
EldoradoEldorado	570	0%	4,715
IL American-GalenaJo Daviess County	563	0%	2,294
Otter Creek Lake Utilities DistrictLoves Park	548	0%	2,342
CaseyCasey	459	0%	3,274
RosevilleRoseville	447	0%	915
Highway 37 North PWDWilliamson County	440	0%	1,068
LindenhurstLindenhurst	439	0%	14,500
Oraville Water DistrictJackson County	435	0%	1,108
BementBement	429	0%	1,661
GriggsvillePike County	391	0%	1,097
East AltonEast Alton	381	0%	5,786
IL American-Ferson CreekKane County	378	0%	1,134
WestfieldWestfield	364	0%	678
PotomacPotomac	324	0%	650
GrantforkGrantfork	315	0%	1,766
SherrardSherrard	314	0%	785
HartfordHartford	299	0%	1,260
IL American-WestlakeLoves Park	295	0%	1,493
TammsTamms	295	0%	653
MansfieldMansfield	293	0%	939
LelandLeland	285	0%	951

Showing 50. See all

No lead or unknown lines reported (449)

Systems serving 1,000 or more people. Systems without counts on file are listed as 0.

Water system	% lead	People
SchaumburgSchaumburg	0%	75,750
IL American-West SuburbanBolingbrook	0%	73,978
Tinley ParkTinley Park	0%	56,703
RomeovilleRomeoville	0%	50,458
Hoffman EstatesHoffman Estates	0%	50,179
Buffalo GroveBuffalo Grove	0%	43,212
Carol StreamCarol Stream	0%	39,854
WheelingWheeling	0%	39,725
StreamwoodStreamwood	0%	38,360
OswegoOswego	0%	38,169
Hanover ParkHanover Park	0%	37,470
North Park PWDMachesney Park	0%	35,580
WoodridgeWoodridge	0%	33,566
Vernon Hills - Lake Co PWVernon Hills	0%	33,207
Glendale HeightsGlendale Heights	0%	33,176
Elk Grove VillageElk Grove	0%	31,802
GalesburgGalesburg	0%	31,620
AlgonquinAlgonquin	0%	30,700
GurneeGurnee	0%	30,193
Ej Water CooperativeJasper County	0%	29,720
New LenoxNew Lenox	0%	29,200
MontgomeryMontgomery	0%	28,956
Lake in the HillsLake In The Hills	0%	28,661
Round Lake BeachRound Lake Beach	0%	27,200
IL American-Homer TownshipWill County	0%	24,543
FrankfortFrankfort	0%	24,000
Loves ParkLoves Park	0%	23,335
YorkvilleYorkville	0%	23,000
Great Lakes Naval Training StationNorth Chicago	0%	23,000
CarbondaleCarbondale	0%	22,107
BloomingdaleWeston	0%	22,018
Park ForestPark Forest	0%	21,687
MokenaMokena	0%	19,887
AlsipAlsip	0%	19,063
ShorewoodShorewood	0%	18,645
Palos HillsPalos Hills	0%	18,530
Justice-Willow Springs Water CommissionJustice	0%	18,450
TroyTroy	0%	16,962
MarionMarion	0%	16,855
Country Club HillsCountry Club Hills	0%	16,500
BridgeviewBridgeview	0%	16,467
Palos HeightsPalos Heights	0%	15,500
BethaltoBethalto	0%	15,210
WashingtonWashington	0%	14,793
Hickory HillsHickory Hills	0%	14,505
Chicago RidgeChicago Ridge	0%	14,130
Wildwood Subdivision - Lake Co PWLake County	0%	14,073
Wood DaleWood Dale	0%	14,012
CaseyvilleCaseyville	0%	13,798
ChannahonChannahon	0%	13,380

Showing the 50 largest. See all

Lead pipes in Illinois cities

Chicago360,857 lead + galv. lines
Naperville293 lead + galv. lines
Joliet307 lead + galv. lines
Rockford15,328 lead + galv. lines
Springfield2,252 lead + galv. lines
Peoria11,442 lead + galv. lines
Champaign1,728 lead + galv. lines
Waukegan7,322 lead + galv. lines
Cicero13,039 lead + galv. lines
Bloomington5,531 lead + galv. lines
Schaumburgno lead reported
Evanston9,468 lead + galv. lines
Arlington Heights3,832 lead + galv. lines
Bolingbrookno lead reported
Palatine541 lead + galv. lines
Skokie6,349 lead + galv. lines
Des Plaines3,075 lead + galv. lines
Orland Park18 lead + galv. lines
Oak Lawn2,706 lead + galv. lines
Mount Prospect727 lead + galv. lines
Berwyn10,828 lead + galv. lines
Tinley Parkno lead reported
Wheaton180 lead + galv. lines
Normal30 lead + galv. lines
Oak Park7,649 lead + galv. lines
Hoffman Estatesno lead reported
Downers Grove1,466 lead + galv. lines
Plainfield128 lead + galv. lines
Glenview427 lead + galv. lines
Elmhurst1,205 lead + galv. lines

All Illinois cities and towns · Lead pipes by county

Illinois lead pipe questions

How many lead pipes are in Illinois?

Illinois's community water systems reported 609,945 lead service lines and 57,405 galvanized lines that must be replaced, for 667,350 in total. Another 514,406 lines are of unknown material.

Which Illinois water systems have the most lead pipes?

Chicago (360,857), Aurora (16,063), Rockford (15,328). Counts are lead plus galvanized-requiring-replacement lines.

What share of Illinois service lines are lead?

17% of reported service lines in Illinois are lead or galvanized requiring replacement, well above the national figure of 3.1%. 13% are still unknown, compared with 21% nationally.

How do I find out if my Illinois home has a lead service line?

Search for your water system or ZIP code above, then open your utility's address-level inventory map. You can also check the pipe where it enters your home with a scratch and magnet test.

Source: EPA SDWIS service line inventory, 2026 Q3. Smaller systems with no lead or unknown lines are omitted. See also national rankings.