Illinois Tap Water Quality

EPA water quality data for 150 community water systems serving 657,059+ people in Illinois. Click any system to see violations, lead testing results, and a safety grade.

Illinois draws drinking water from Lake Michigan (for Chicago and the northern suburbs) and from rivers and aquifers downstate. Radium contamination in deep wells has affected communities across the Fox River Valley and north-central Illinois. Lead from aging service lines is a significant concern in Chicago, which has more lead pipes than any other U.S. city.

IL AMERICAN-CHAMPAIGN GODFREY, IL · 150,000 people · Groundwater BERWYN BERWYN, IL · 57,250 people · Surface Water Purchased QUINCY QUINCY, IL · 42,000 people · Surface Water BELVIDERE BELVIDERE, IL · 25,339 people · Groundwater MATTOON MATTOON, IL · 19,500 people · Surface Water BELLWOOD BELLWOOD, IL · 19,156 people · Surface Water Purchased ALSIP ALSIP, IL · 19,063 people · Surface Water Purchased CHARLESTON CHARLESTON, IL · 17,286 people · Surface Water RANTOUL RANTOUL, IL · 13,000 people · Groundwater U OF I-CHAMPAIGN CHAMPAIGN, IL · 13,000 people · Groundwater Purchased TAYLORVILLE TAYLORVILLE, IL · 12,806 people · Surface Water SUMMIT SUMMIT, IL · 10,875 people · Surface Water Purchased CLARK-EDGAR RWD MARSHALL, IL · 9,657 people · Groundwater CLEAR WATER SERVICE CORP MATTOON, IL · 8,900 people · Groundwater GREENVILLE GREENVILLE, IL · 8,310 people · Surface Water PRINCETON PRINCETON, IL · 7,832 people · Groundwater ABS WATER COOP CLAYTON, IL · 6,858 people · Groundwater Purchased BOND/MADISON WATER COMPANY POCAHONTAS, IL · 6,645 people · Surface Water Purchased MAHOMET MAHOMET, IL · 6,580 people · Groundwater AQUA ILLINOIS-CANDLEWICK DVN KANKAKEE, IL · 6,426 people · Groundwater BEARDSTOWN BEARDSTOWN, IL · 5,951 people · Groundwater PANA PANA, IL · 5,800 people · Surface Water MILL CREEK PWD QUINCY, IL · 5,755 people · Groundwater SPRING VALLEY SPRING VALLEY, IL · 5,582 people · Groundwater EASTERN ILLINOIS UNIVERSITY CHARLESTON, IL · 5,500 people · Surface Water Purchased SANGAMON VALLEY PWD MAHOMET, IL · 5,300 people · Groundwater FLORA FLORA, IL · 5,233 people · Surface Water Purchased BERKELEY BERKELEY, IL · 5,214 people · Surface Water Purchased BREESE BREESE, IL · 4,772 people · Surface Water CALHOUN COUNTY RWD HARDIN, IL · 4,675 people · Groundwater NEW BADEN NEW BADEN, IL · 4,178 people · Surface Water Purchased MARSHALL MARSHALL, IL · 3,947 people · Groundwater EMBARRAS AREA WATER DISTRICT CHARLESTON, IL · 3,750 people · Groundwater Purchased IL AMERICAN-TOLONO GODFREY, IL · 3,604 people · Groundwater Purchased CARLYLE CARLYLE, IL · 3,373 people · Surface Water CASEY CASEY, IL · 3,274 people · Groundwater Purchased MOUNT STERLING MT. STERLING, IL · 3,271 people · Groundwater Purchased SAVANNA SAVANNA, IL · 3,020 people · Groundwater SOUTH PALOS TWSP SANITARY DIST PALOS PARK, IL · 2,800 people · Surface Water Purchased TRENTON TRENTON, IL · 2,742 people · Surface Water Purchased AVISTON AVISTON, IL · 2,545 people · Surface Water Purchased CLAYTON-CAMP POINT WATER COMMISSION CAMP POINT, IL · 2,470 people · Groundwater POPLAR GROVE POPLAR GROVE, IL · 2,372 people · Groundwater SOUTHWATER INC TAMMS, IL · 2,185 people · Groundwater THOMSON MAXIMUM SECURITY CENTER THOMSON, IL · 2,166 people · Groundwater Purchased IL AMERICAN-FISHER GODFREY, IL · 2,026 people · Groundwater CLAY COUNTY WATER INC FLORA, IL · 2,015 people · Surface Water Purchased CLINTON COUNTY EAST PWD CENTRALIA, IL · 1,980 people · Surface Water Purchased POPLAR GROVE SOUTH POPLAR GROVE, IL · 1,877 people · Groundwater CARLYLE NORTH WATER COMPANY, INC. CARLYLE, IL · 1,850 people · Surface Water Purchased DE PUE DEPUE, IL · 1,838 people · Groundwater IL AMERICAN-CAIRO GODFREY, IL · 1,821 people · Groundwater CARLYLE SOUTHWEST PWD CENTRALIA, IL · 1,815 people · Surface Water Purchased CENTRAL ALEXANDER CNTY PWD OLIVE BRANCH, IL · 1,763 people · Groundwater Purchased ST ROSE PWD ST ROSE, IL · 1,688 people · Surface Water Purchased WESTERN IL CORRECTIONAL CENTER MT. STERLING, IL · 1,600 people · Groundwater Purchased KINCAID KINCAID, IL · 1,561 people · Surface Water Purchased GERMANTOWN GERMANTOWN, IL · 1,537 people · Surface Water Purchased VIRGINIA VIRGINIA, IL · 1,514 people · Groundwater LANARK LANARK, IL · 1,504 people · Groundwater MOUNT CARROLL MT CARROLL, IL · 1,479 people · Groundwater FOUR SEASONS MHP PROVO, UT · 1,468 people · Groundwater Purchased SUNSET MHP NORTHBROOK, IL · 1,400 people · Surface Water Purchased CENTRALIA CORRECTIONAL SITE CENTRALIA, IL · 1,397 people · Surface Water Purchased PAYSON PAYSON, IL · 1,386 people · Groundwater AQUA ILLINOIS-PHILO KANKAKEE, IL · 1,378 people · Groundwater Purchased CAPRON CAPRON, IL · 1,343 people · Groundwater ASHLAND ASHLAND, IL · 1,333 people · Surface Water Purchased ASSUMPTION ASSUMPTION, IL · 1,315 people · Groundwater WALNUT WALNUT, IL · 1,311 people · Groundwater TAYLORVILLE CORRECTIONAL CENTER TAYLORVILLE, IL · 1,300 people · Surface Water Purchased LADD LADD, IL · 1,263 people · Groundwater ALBERS ALBERS, IL · 1,231 people · Surface Water Purchased LOUISVILLE LOUISVILLE, IL · 1,201 people · Surface Water Purchased HOMER HOMER, IL · 1,200 people · Groundwater MARTINSVILLE MARTINSVILLE, IL · 1,200 people · Groundwater Purchased CAMP POINT CAMP POINT, IL · 1,190 people · Groundwater Purchased SOUTH BARRINGTON GENEVA, IL · 1,175 people · Groundwater EDINBURG EDINBURG, IL · 1,068 people · Groundwater MORRISONVILLE MORRISONVILLE, IL · 1,068 people · Groundwater THOMASBORO THOMASBORO, IL · 1,066 people · Groundwater HOFFMAN RURAL WATER COMPANY CARLYLE, IL · 1,015 people · Surface Water Purchased MILLEDGEVILLE MILLEDGEVILLE, IL · 989 people · Groundwater CLAY CITY CLAY CITY, IL · 957 people · Groundwater Purchased MENDON MENDON, IL · 953 people · Groundwater Purchased STONINGTON STONINGTON, IL · 932 people · Groundwater BECKEMEYER BECKEMEYER, IL · 913 people · Surface Water Purchased GIFFORD GIFFORD, IL · 911 people · Groundwater MCCLURE-EAST CAPE PWD MCCLURE, IL · 910 people · Groundwater Purchased WYANET WYANET, IL · 886 people · Groundwater SHARPSBURG AND NEIGHBORING AREA WATER SY STONINGTON, IL · 868 people · Groundwater Purchased ILUR LIBERTY COMMONS MHP LLC CROFTON, MD · 865 people · Groundwater Purchased IL AMERICAN-HARDIN GODFREY, IL · 839 people · Groundwater CHANDLERVILLE CHANDLERVILLE, IL · 838 people · Groundwater ADAMS COUNTY WATER DISTRICT NO 1 PALOMA, IL · 833 people · Groundwater Purchased SHEFFIELD KEWANEE, IL · 821 people · Groundwater NEW MEMPHIS PWD NEW MEMPHIS, IL · 805 people · Surface Water Purchased SHANNON SHANNON, IL · 801 people · Groundwater POPLAR GROVE WEST-COUNTRYSIDE POPLAR GROVE, IL · 790 people · Groundwater LAMOILLE LA MOILLE, IL · 750 people · Groundwater OGDEN OGDEN, IL · 750 people · Groundwater TISKILWA TISKILWA, IL · 740 people · Groundwater OAKLAND OAKLAND, IL · 739 people · Groundwater Purchased COOKS MILLS WATER ASSOCIATION MATTOON, IL · 720 people · Groundwater GREENVIEW ESTATES MHP BELVIDERE, IL · 710 people · Groundwater Purchased CLAYTON CLAYTON, IL · 709 people · Groundwater Purchased BUCKHORN RANCH ESTATES MHP DENVER, CO · 702 people · Surface Water Purchased POCAHONTAS AVISTON, IL · 697 people · Surface Water Purchased SHADOW WOOD MHP CHAMPAIGN, IL · 680 people · Groundwater Purchased WESTFIELD WESTFIELD, IL · 678 people · Groundwater Purchased ARENZVILLE RURAL WATER COOPERATIVE ALEXANDER, IL · 675 people · Groundwater Purchased DALZELL PERU, IL · 663 people · Groundwater TAMMS TAMMS, IL · 653 people · Groundwater Purchased ASHMORE ASHMORE, IL · 637 people · Groundwater BARTELSO BARTELSO, IL · 635 people · Groundwater URSA URSA, IL · 626 people · Groundwater Purchased KEYESPORT KEYESPORT, IL · 625 people · Surface Water Purchased GOLDEN GOLDEN, IL · 620 people · Groundwater Purchased LIBERTY LIBERTY, IL · 609 people · Groundwater Purchased DAMIANSVILLE DAMIANSVILLE, IL · 602 people · Surface Water Purchased BEDFORD PARK BEDFORD PARK, IL · 602 people · Surface Water Purchased UNION-YORK WATER DISTRICT WEST UNION, IL · 600 people · Groundwater THOMSON PERU, IL · 580 people · Groundwater MULBERRY GROVE MULBERRY GROVE, IL · 548 people · Surface Water Purchased XENIA XENIA, IL · 542 people · Surface Water Purchased CHADWICK CHADWICK, IL · 523 people · Groundwater TOVEY TOVEY, IL · 512 people · Surface Water Purchased FRANCISCAN SISTERS OF CHICAGO LEMONT, IL · 505 people · Groundwater Purchased HERITAGE OF RANTOUL CROFTON, MD · 500 people · Groundwater Purchased CHERRY PERU, IL · 490 people · Groundwater BUDA PERU, IL · 482 people · Groundwater MOUNT AUBURN MT. AUBURN, IL · 480 people · Groundwater Purchased VERSAILLES VERSAILLES, IL · 478 people · Groundwater OHIO OHIO, IL · 465 people · Groundwater PARADISE MHP PHOENIX, AZ · 460 people · Surface Water Purchased HOFFMAN PATOKA, IL · 452 people · Surface Water Purchased OAK LAWN MHP POPLAR GROVE, IL · 450 people · Groundwater Purchased NEPONSET NEPONSET, IL · 450 people · Groundwater LANGLEYVILLE PWD LANGLEYVILLE, IL · 450 people · Surface Water Purchased SORENTO AVISTON, IL · 429 people · Surface Water Purchased ARENZVILLE ARENZVILLE, IL · 419 people · Groundwater CASS RURAL WATER DISTRICT ALEXANDER, IL · 403 people · Groundwater Purchased IL VETERANS HOME (QUINCY) QUINCY, IL · 401 people · Surface Water Purchased SEYMOUR WATER DISTRICT SEYMOUR, IL · 392 people · Groundwater Purchased FOUNTAIN VALLEY MHP RANTOUL, IL · 375 people · Groundwater LONGACRE ESTATES MHP FARMINGTON HILLS, MI · 375 people · Surface Water Purchased ILUR WOODS EDGE MHP LLC CROFTON, MD · 373 people · Groundwater Purchased HUMBOLDT HUMBOLDT, IL · 361 people · Surface Water Purchased EJ WATER-DEWEY DIETERICH, IL · 350 people · Groundwater PANAMA AVISTON, IL · 343 people · Surface Water Purchased