All water systems in Illinois
5,097 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Gateway MHP Frankfort · Will County |
884 | 0 | 0 | |
|
Hanaford Hanaford · Franklin County |
883 | 1 | 0 | |
|
Clifton Central High School Iroquois County |
875 | 5 | 0 | |
|
Piper City Piper City · Ford County |
875 | 2 | 0 | |
|
Ridgway Ridgway · Gallatin County |
874 | 1 | 1 | |
|
Lawrence County Correctional Center Lawrence County |
870 | 5 | 2 | |
|
Viola Viola · Mercer County |
869 | 2 | 1 | |
|
IL American-Holiday Hills Holiday Hills · McHenry County |
868 | 0 | 0 | |
|
Lakewood Shores Improvement Association Joliet · Will County |
868 | 4 | 2 | |
|
Sharpsburg and Neighboring Area Water SY Stonington · Christian County |
868 | 0 | 0 | |
|
Tallula Tallula · Menard County |
868 | 0 | 0 | |
|
Ilur Liberty Commons MHP LLC Urbana · Champaign County |
865 | 0 | 0 | |
|
Hanover Hanover · Jo Daviess County |
863 | 0 | 0 | |
|
Wee-Ma-Tuk Water District Fulton County |
863 | 1 | 0 | |
|
East Galesburg East Galesburg · Knox County |
860 | 2 | 0 | |
|
Dahlgren Dahlgren · Hamilton County |
859 | 0 | 0 | |
|
Greenview Greenview · Menard County |
858 | 1 | 0 | |
|
Brimfield Brimfield · Peoria County |
856 | 0 | 0 | |
|
Aqua Illinois-Crystal Clear Water Co. McHenry County |
855 | 1 | 0 | |
|
Dunfermline-St David Water Commission Fulton County |
850 | 1 | 0 | |
|
ST Bede Church Lake County |
850 | 1 | 0 | |
|
Albany Albany · Whiteside County |
846 | 7 | 0 | |
|
Cissna Park Cissna Park · Iroquois County |
846 | 2 | 0 | |
|
Annawan Annawan · Henry County |
843 | 1 | 0 | |
|
Hardin County Water District No.1 Hardin County |
843 | 0 | 0 | |
|
IL American-Hardin Hardin · Calhoun County |
839 | 0 | 0 | |
|
Chandlerville Chandlerville · Cass County |
838 | 2 | 0 | |
|
South Palmyra Water Commission Macoupin County |
838 | 3 | 0 | |
|
Stronghurst Stronghurst · Henderson County |
838 | 1 | 1 | |
|
Alexis Alexis · Warren County |
836 | 2 | 0 | |
|
Newman Newman · Douglas County |
836 | 1 | 0 | |
|
IL American-Cherry Hill Will County |
833 | 0 | 0 | |
|
Hopedale Hopedale · Tazewell County |
830 | 1 | 0 | |
|
Paw Paw Paw Paw · Lee County |
830 | 0 | 0 | |
|
Yates City Yates City · Knox County |
828 | 1 | 0 | |
|
IL American-Livingston Livingston · Madison County |
825 | 0 | 0 | |
|
Glenbrook SD Cook County |
822 | 0 | 0 | |
|
Aldi #92 Cook County |
821 | 0 | 0 | |
|
Sheffield Sheffield · Bureau County |
821 | 2 | 0 | |
|
Exeter-Merritt Water Coop Scott County |
820 | 2 | 0 | |
|
West Salem West Salem · Edwards County |
819 | 0 | 0 | |
|
Round Prairie Water Coop Springfield · Sangamon County |
813 | 1 | 0 | |
|
Loami Loami · Sangamon County |
812 | 0 | 0 | |
|
Constellation Dresden Station Grundy County |
811 | 1 | 0 | |
|
Blairsville Pwd Carterville · Williamson County |
807 | 6 | 1 | |
|
New Memphis Pwd Clinton County |
805 | 1 | 0 | |
|
Noble Noble · Richland County |
805 | 0 | 0 | |
|
Elizabeth Elizabeth · Jo Daviess County |
802 | 1 | 0 | |
|
Shannon Shannon · Carroll County |
801 | 1 | 0 | |
|
Adams County Water District NO 1 Adams County |
800 | 2 | 0 |
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 still 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. Retrieved from ECHO on Oct 11, 2026.