All water systems in Illinois
57 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
McHenry Storage/michael's Bist McHenry County |
25 | 0 | 0 | |
|
Vernon Henry Marshall County |
25 | 0 | 0 | |
|
Vernon Henry Marshall County |
25 | 0 | 0 | |
|
Riverview MHP (henry County) Henry County |
21 | 1 | 1 | |
|
MC Henry FS McHenry County |
15 | 0 | 0 | |
|
McHenry Lock and Dam McHenry County |
10 | 0 | 0 | |
|
Camp Henry Horner Welcome Center Lake County |
0 | 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 currently 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.