All water systems in Illinois
5,097 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Mackinaw Tazewell County |
3,399 | 0 | 0 | |
|
Rushville Rushville · Schuyler County |
3,375 | 1 | 1 | |
|
Carlyle Carlyle · Clinton County |
3,373 | 4 | 1 | |
|
Fulton Fulton · Whiteside County |
3,346 | 2 | 0 | |
|
Pontoon Beach Pwd Pontoon Beach · Madison County |
3,325 | 3 | 0 | |
|
Galena Galena · Jo Daviess County |
3,308 | 4 | 1 | |
|
IL American-Liberty Ridge West DuPage County |
3,307 | 0 | 0 | |
|
Abingdon Abingdon · Knox County |
3,275 | 1 | 0 | |
|
Casey Casey · Clark County |
3,274 | 2 | 1 | |
|
Virden Virden · Macoupin County |
3,274 | 1 | 1 | |
|
Mount Sterling Mount Sterling · Brown County |
3,271 | 2 | 0 | |
|
Western Wayne Water District Wayne City · Wayne County |
3,253 | 1 | 1 | |
|
Olin Winchester LLC Madison County |
3,250 | 2 | 0 | |
|
Indian Head Park Indian Head Park · Cook County |
3,240 | 1 | 1 | |
|
Nashville Nashville · Washington County |
3,230 | 1 | 0 | |
|
North East Marion County Water Cmpny Marion County |
3,220 | 1 | 0 | |
|
Northshore Univ Glenbrook Cook County |
3,200 | 4 | 1 | |
|
Knoxville Knoxville · Knox County |
3,120 | 1 | 0 | |
|
East Dundee East Dundee · Kane County |
3,115 | 1 | 0 | |
|
Smg Water Coop Morgan County |
3,110 | 0 | 0 | |
|
Sleepy Hollow Sleepy Hollow · Kane County |
3,100 | 1 | 0 | |
|
Momence Momence · Kankakee County |
3,075 | 1 | 0 | |
|
West Prairie Water Company Douglas County |
3,073 | 1 | 0 | |
|
Christopher Christopher · Franklin County |
3,072 | 2 | 0 | |
|
Aqua Illinois-Hawthorn Woods Lake County |
3,065 | 3 | 0 | |
|
Lakeside Pwd Jackson County |
3,065 | 4 | 0 | |
|
Holiday Shores SD Madison County |
3,025 | 0 | 0 | |
|
Savanna Savanna · Carroll County |
3,020 | 2 | 1 | |
|
Cat Mossville Peoria County |
3,000 | 1 | 1 | |
|
Oasis MHP Cook County |
3,000 | 1 | 0 | |
|
Burnside Pwd Johnson County |
2,998 | 1 | 0 | |
|
Newton Newton · Jasper County |
2,977 | 0 | 0 | |
|
Marquette Heights Marquette Heights · Tazewell County |
2,974 | 2 | 0 | |
|
Dixmoor Dixmoor · Cook County |
2,973 | 5 | 4 | |
|
Bushnell Bushnell · McDonough County |
2,972 | 0 | 0 | |
|
Havana Havana · Mason County |
2,963 | 1 | 0 | |
|
Menard Correctional Center Randolph County |
2,950 | 4 | 2 | |
|
Pittsburg Pittsburg · Williamson County |
2,948 | 0 | 0 | |
|
Fmc Water Company Marion County |
2,945 | 1 | 0 | |
|
Winnebago Winnebago · Winnebago County |
2,940 | 0 | 0 | |
|
Arcola Arcola · Douglas County |
2,927 | 4 | 0 | |
|
EL Paso El Paso · Woodford County |
2,900 | 0 | 0 | |
|
Mount Morris Mount Morris · Ogle County |
2,861 | 1 | 1 | |
|
Heyworth Heyworth · McLean County |
2,853 | 0 | 0 | |
|
Mission Brook SD Cook County |
2,852 | 1 | 0 | |
|
Albion Albion · Edwards County |
2,839 | 4 | 0 | |
|
Southern IL University-Edwardsville Madison County |
2,817 | 0 | 0 | |
|
McLeansboro Mcleansboro · Hamilton County |
2,812 | 5 | 4 | |
|
Highland Park Hospital Lake County |
2,800 | 5 | 2 | |
|
South Palos Twsp Sanitary Dist Cook County |
2,800 | 3 | 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.