All water systems in Illinois
5,097 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Dowell Dowell · Jackson County |
1,188 | 1 | 0 | |
|
Ferges Water District Williamson County |
1,185 | 2 | 2 | |
|
IL American-Andalusia Andalusia · Rock Island County |
1,184 | 1 | 1 | |
|
Valier Valier · Franklin County |
1,182 | 0 | 0 | |
|
Minier Minier · Tazewell County |
1,180 | 0 | 0 | |
|
Walnut Hill Walnut Hill · Marion County |
1,180 | 1 | 0 | |
|
South Barrington Cook County |
1,175 | 1 | 1 | |
|
Mechanicsburg-Buffalo Water Commission Sangamon County |
1,170 | 7 | 2 | |
|
Kingston Kingston · DeKalb County |
1,160 | 0 | 0 | |
|
Atwood Atwood · Douglas County |
1,155 | 2 | 0 | |
|
New Berlin Sangamon County |
1,150 | 6 | 2 | |
|
Gorham Gorham · Jackson County |
1,143 | 1 | 1 | |
|
IL American-Washington Estates Washington · Tazewell County |
1,143 | 0 | 0 | |
|
Malta Malta · DeKalb County |
1,143 | 3 | 0 | |
|
Prospect Water District Saline County |
1,140 | 0 | 0 | |
|
IL American-Ferson Creek Kane County |
1,134 | 4 | 0 | |
|
Heartville Pwd Effingham County |
1,125 | 3 | 0 | |
|
Oquawka Oquawka · Henderson County |
1,125 | 1 | 0 | |
|
Johnsburg No.2 McHenry County |
1,124 | 3 | 0 | |
|
Royalton Royalton · Franklin County |
1,118 | 6 | 0 | |
|
Oraville Water District Jackson County |
1,108 | 0 | 0 | |
|
IL American-Valley Marina Kendall County |
1,102 | 0 | 0 | |
|
Divernon Divernon · Sangamon County |
1,100 | 0 | 0 | |
|
Woodlawn Middle/country Meadow Elem Lake County |
1,100 | 5 | 0 | |
|
Greenfield Greenfield · Greene County |
1,097 | 2 | 0 | |
|
Griggsville Pike County |
1,097 | 3 | 1 | |
|
Worden Worden · Madison County |
1,096 | 2 | 1 | |
|
Crossville Crossville · White County |
1,091 | 0 | 0 | |
|
Danvers Danvers · McLean County |
1,089 | 1 | 0 | |
|
Hamel Hamel · Madison County |
1,087 | 2 | 0 | |
|
Robinson Correctional Center Crawford County |
1,085 | 0 | 0 | |
|
Irvington Irvington · Washington County |
1,081 | 1 | 1 | |
|
Meredosia Meredosia · Morgan County |
1,075 | 1 | 0 | |
|
Flanagan Flanagan · Livingston County |
1,070 | 2 | 1 | |
|
Edinburg Edinburg · Christian County |
1,068 | 3 | 1 | |
|
Elkville Elkville · Jackson County |
1,068 | 3 | 0 | |
|
Goreville Goreville · Johnson County |
1,068 | 3 | 0 | |
|
Highway 37 North Pwd Williamson County |
1,068 | 2 | 0 | |
|
Morrisonville Morrisonville · Christian County |
1,068 | 3 | 1 | |
|
Thomasboro Thomasboro · Champaign County |
1,066 | 3 | 0 | |
|
Enfield Enfield · White County |
1,064 | 2 | 0 | |
|
Harbor Point Estates MHP Northbrook · Cook County |
1,064 | 4 | 0 | |
|
IL American-Harbor Ridge Lake County |
1,064 | 0 | 0 | |
|
Shawneetown Shawneetown · Gallatin County |
1,054 | 2 | 1 | |
|
Ava Ava · Jackson County |
1,053 | 2 | 0 | |
|
Coulterville Coulterville · Randolph County |
1,052 | 2 | 0 | |
|
Franciscan Health Olympia Fields Cook County |
1,050 | 2 | 0 | |
|
Prairie Grove School McHenry County |
1,050 | 2 | 0 | |
|
Suburban Apartments (de Kalb Univ Dvl) DeKalb County |
1,050 | 5 | 1 | |
|
Chebanse Chebanse · Iroquois County |
1,044 | 1 | 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 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.