Fluoride violations in Illinois
9 active public water systems in Illinois had a Fluoride violation in the past three years. What Fluoride is and why it matters.
Systems with a Fluoride violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Crest Hill Crest Hill · Will County |
20,223 | 10 | 2 | |
|
Fox Lake Fox Lake · Lake County |
11,780 | 5 | 1 | |
|
Crete Crete · Will County |
8,386 | 4 | 0 | |
|
IL American-Bahl Water Company Jo Daviess County |
700 | 7 | 1 | |
|
Apple River Apple River · Jo Daviess County |
347 | 3 | 0 | |
|
Cabery Cabery · Ford County |
266 | 6 | 2 | |
|
Sylvan Lake 1st Subdivision Lake County |
210 | 6 | 0 | |
|
Cortland Corners MHP DeKalb County |
205 | 10 | 3 | |
|
Emington Emington · Livingston County |
101 | 4 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Fluoride, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Fluoride alone.
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.