All water systems in Illinois
30 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Cook CO Ferndale Hgts Subd Cook County |
11,724 | 0 | 0 | |
|
Vandercook School Winnebago County |
300 | 0 | 0 | |
|
Cook CO NO Shore Towers Condo Cook County |
180 | 0 | 0 | |
|
Cook County Edgewood AC Cook County · Cook County |
175 | 0 | 0 | |
|
Lake-Cook Commons-Sal Damucci Cook County |
175 | 0 | 0 | |
|
Chef Klaus Country Cookin Will County |
150 | 0 | 0 | |
|
Cooks Grove Lake County |
100 | 0 | 0 | |
|
Cooks Grove Lake County |
100 | 0 | 0 | |
|
Lake Cook Farm and Garden Lake County |
60 | 0 | 0 | |
|
Cook CO Countryside Plaza Cook County |
50 | 0 | 0 | |
|
Will Cook Ace Hardware Will County |
50 | 0 | 0 | |
|
Will Cook Ace Hardware Will County |
40 | 0 | 0 | |
|
Miller's Home Cooking Moultrie County |
35 | 0 | 0 | |
|
Cook County Forest Preserve Cook County |
25 | 0 | 0 | |
|
Cook County Forest Preserve Cook County |
25 | 0 | 0 | |
|
Cook County Forest Preserve Cook County |
25 | 0 | 0 | |
|
Cook County Fp/family Pic1212 Cook County |
25 | 0 | 0 | |
|
Cook County Mobile Homes Cook County Mob · Cook County |
25 | 0 | 0 | |
|
Cook's Drug Store Edgar County |
25 | 0 | 0 | |
|
Cook's Drug Store Edgar County |
25 | 0 | 0 | |
|
Cook's Store Clay County |
25 | 0 | 0 | |
|
Cook's Store Fayette County |
25 | 0 | 0 | |
|
Cook's Store Fayette County |
25 | 0 | 0 | |
|
Cooks MHP Ottawa Twp · LaSalle County |
25 | 0 | 0 | |
|
Cooksville Union Church McLean County |
25 | 0 | 0 | |
|
Country Cook Inn DuPage County |
25 | 0 | 0 | |
|
Country Cookin' Smorgasbord Hardin County |
25 | 0 | 0 | |
|
Forest Preserve Cook County Cook County |
25 | 0 | 0 | |
|
FS Lake-Cook Farm and Garden Lake County |
25 | 0 | 0 | |
|
Cookie Outlet Store DuPage County |
5 | 0 | 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.