All water systems in Illinois
5,097 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Milford Milford · Iroquois County |
1,306 | 5 | 2 | |
|
Blue Mound Blue Mound · Macon County |
1,300 | 5 | 3 | |
|
Taylorville Correctional Center Taylorville · Christian County |
1,300 | 2 | 0 | |
|
Wyoming Wyoming · Stark County |
1,300 | 4 | 1 | |
|
IL American-Lake Wildwood Marshall County |
1,295 | 0 | 0 | |
|
Good Shepherd Hospital Lake County |
1,290 | 8 | 2 | |
|
Countryside Lake Subdivision -Lake CO PW Lake County |
1,287 | 0 | 0 | |
|
Fairfield Rural Waterworks--New Hope Fairfield · Wayne County |
1,285 | 4 | 1 | |
|
Toledo Toledo · Cumberland County |
1,278 | 0 | 0 | |
|
Petrolia Pwd Lawrence County |
1,275 | 1 | 0 | |
|
Chrisman Chrisman · Edgar County |
1,273 | 3 | 3 | |
|
ST Elmo Saint Elmo · Fayette County |
1,272 | 0 | 0 | |
|
Cobden Cobden · Union County |
1,267 | 1 | 0 | |
|
Ladd Ladd · Bureau County |
1,263 | 0 | 0 | |
|
Hartford Hartford · Madison County |
1,260 | 2 | 0 | |
|
Liberty-Ledford Pwd Saline County |
1,255 | 1 | 0 | |
|
Hanna City Hanna City · Peoria County |
1,253 | 0 | 0 | |
|
Lake Williamson Christian Center Macoupin County |
1,250 | 4 | 0 | |
|
Mound Pwd St. Clair County |
1,243 | 4 | 3 | |
|
Prospect Heights Plaza Cook County |
1,240 | 6 | 2 | |
|
Wayne City Wayne City · Wayne County |
1,239 | 1 | 0 | |
|
Blackhawk Estates LLC Cook County |
1,238 | 3 | 1 | |
|
IL American-Rosiclare Rosiclare · Hardin County |
1,233 | 0 | 0 | |
|
Valmeyer Valmeyer · Monroe County |
1,233 | 0 | 0 | |
|
Cuba Cuba · Fulton County |
1,232 | 2 | 0 | |
|
IL American-Killarney McHenry County |
1,232 | 0 | 0 | |
|
Albers Albers · Clinton County |
1,231 | 3 | 2 | |
|
Warrensburg Warrensburg · Macon County |
1,230 | 3 | 2 | |
|
Forrest Forrest · Livingston County |
1,225 | 0 | 0 | |
|
IL American-Arbury Will County |
1,225 | 0 | 0 | |
|
Hillcrest Hillcrest · Ogle County |
1,224 | 5 | 0 | |
|
Macon Macon · Macon County |
1,205 | 1 | 0 | |
|
Downs Downs · McLean County |
1,201 | 3 | 1 | |
|
Louisville Louisville · Clay County |
1,201 | 1 | 0 | |
|
Aqua Illinois-Skyline (northern) Kane County |
1,200 | 2 | 0 | |
|
Chatsworth Chatsworth · Livingston County |
1,200 | 3 | 1 | |
|
Homer Homer · Champaign County |
1,200 | 0 | 0 | |
|
Laharpe La Harpe · Hancock County |
1,200 | 5 | 1 | |
|
Martinsville Martinsville · Clark County |
1,200 | 1 | 1 | |
|
Nauvoo Nauvoo · Hancock County |
1,200 | 3 | 0 | |
|
Park Center of Kemper Lakes Aviands Lake County |
1,200 | 4 | 0 | |
|
ST Anne Saint Anne · Kankakee County |
1,200 | 4 | 0 | |
|
Stillman Valley Stillman Valley · Ogle County |
1,200 | 0 | 0 | |
|
Swedish Covenant Hospital Cook County |
1,200 | 6 | 1 | |
|
Windsor Windsor · Shelby County |
1,200 | 2 | 0 | |
|
South Lawrence Water Corp Lawrence County |
1,195 | 0 | 0 | |
|
Waverly Waverly · Morgan County |
1,194 | 0 | 0 | |
|
IL American-Glasford Glasford · Peoria County |
1,193 | 0 | 0 | |
|
Toulon Toulon · Stark County |
1,193 | 3 | 3 | |
|
Camp Point Camp Point · Adams County |
1,190 | 1 | 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.