All water systems in Illinois
5,097 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Metro Prep School Cook County |
690 | 0 | 0 | |
|
Tampico Tampico · Whiteside County |
689 | 1 | 0 | |
|
White Heath Waterworks Piatt County |
685 | 1 | 0 | |
|
Creal Springs Creal Springs · Williamson County |
683 | 2 | 0 | |
|
IL American-Terra Cotta McHenry County |
681 | 0 | 0 | |
|
Shadow Wood MHP Champaign · Champaign County |
680 | 0 | 0 | |
|
IL American-Lombard Heights Lombard · DuPage County |
679 | 0 | 0 | |
|
Saybrook Saybrook · McLean County |
679 | 0 | 0 | |
|
Westfield Westfield · Clark County |
678 | 6 | 2 | |
|
River Oaks Estates MHP Calumet City · Cook County |
677 | 1 | 0 | |
|
Bradford Bradford · Stark County |
676 | 1 | 0 | |
|
Arenzville Rural Water Cooperative Cass County |
675 | 0 | 0 | |
|
Lake County Pw Hawthorn Woods Hawthorn Woods · Lake County |
675 | 1 | 1 | |
|
Ferson Creek Elem Schl-Cusd 303 Kane County |
667 | 6 | 1 | |
|
West City West City · Franklin County |
664 | 1 | 0 | |
|
Cedarville Cedarville · Stephenson County |
663 | 1 | 0 | |
|
Dalzell Dalzell · Bureau County |
663 | 1 | 1 | |
|
Evansville Evansville · Randolph County |
660 | 2 | 0 | |
|
Lamoille La Moille · Bureau County |
660 | 3 | 1 | |
|
Cambridge Courts MHP Northbrook · Lake County |
658 | 2 | 0 | |
|
Chapin Chapin · Morgan County |
658 | 1 | 0 | |
|
Hoyleton Hoyleton · Washington County |
658 | 0 | 0 | |
|
Tamms Tamms · Alexander County |
653 | 2 | 0 | |
|
Equality Equality · Gallatin County |
652 | 1 | 1 | |
|
Matherville Mathersville · Mercer County |
651 | 0 | 0 | |
|
Aqua Illinois-Ivanhoe Lake County |
650 | 0 | 0 | |
|
Crescent City Crescent City · Iroquois County |
650 | 0 | 0 | |
|
Forest View MHP Winnebago County |
650 | 0 | 0 | |
|
Lakepoint Club C/o George Kappos Will County |
650 | 2 | 2 | |
|
Marathon Lake Villa #112888 Lake County |
650 | 0 | 0 | |
|
Millburn School Dist #24 Lake County |
650 | 2 | 0 | |
|
Potomac Potomac · Vermilion County |
650 | 3 | 1 | |
|
Shops of Kildeer Lake County |
650 | 7 | 2 | |
|
EJ Water-Niantic Niantic · Macon County |
648 | 2 | 0 | |
|
Vergennes Vergennes · Jackson County |
648 | 3 | 0 | |
|
Coffeen Coffeen · Montgomery County |
647 | 3 | 1 | |
|
Deer Creek Deer Creek · Tazewell County |
647 | 0 | 0 | |
|
Williamsfield Williamsfield · Knox County |
647 | 2 | 0 | |
|
Balmoral Elem Will County |
645 | 4 | 1 | |
|
Bayles Lake Lot Owners Association Iroquois County |
645 | 0 | 0 | |
|
Oneida Oneida · Knox County |
644 | 1 | 0 | |
|
Bartelso Bartelso · Clinton County |
643 | 1 | 1 | |
|
Cordova Cordova · Rock Island County |
640 | 3 | 0 | |
|
Green Valley Green Valley · Tazewell County |
638 | 0 | 0 | |
|
Ashmore Ashmore · Coles County |
637 | 8 | 0 | |
|
Cisne Cisne · Wayne County |
634 | 0 | 0 | |
|
Channahon East Channahon · Will County |
630 | 1 | 0 | |
|
Golconda Golconda · Pope County |
630 | 2 | 0 | |
|
ST Libory St Libory · St. Clair County |
628 | 1 | 0 | |
|
Creston Creston · Ogle County |
627 | 4 | 1 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules currently in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Illinois records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.