Lead and Copper Rule (LCR) violations in Illinois
278 active public water systems in Illinois had a Lead and Copper Rule (LCR) violation in the past three years, 278 of them in the latest quarter of EPA's data. What Lead and Copper Rule (LCR) is and why it matters.
Systems with a Lead and Copper Rule (LCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
McLeansboro Mcleansboro · Hamilton County |
2,812 | 5 | 4 | |
|
Highland Park Hospital Lake County |
2,800 | 5 | 2 | |
|
Carrollton Carrollton · Greene County |
2,513 | 2 | 1 | |
|
Thornton Thornton · Cook County |
2,386 | 2 | 1 | |
|
Nokomis Montgomery County |
2,370 | 1 | 1 | |
|
Mount Olive Macoupin County |
2,193 | 6 | 2 | |
|
Rockdale Rockdale · Will County |
2,012 | 5 | 3 | |
|
Southeast Joliet SD Joliet · Will County |
2,000 | 8 | 3 | |
|
Marissa Marissa · St. Clair County |
1,921 | 2 | 1 | |
|
Poplar Grove South Poplar Grove · Boone County |
1,877 | 5 | 1 | |
|
Chenoa Chenoa · McLean County |
1,800 | 2 | 1 | |
|
Grantfork Grantfork · Madison County |
1,766 | 5 | 2 | |
|
Central Alexander Cnty Pwd Alexander County |
1,763 | 2 | 1 | |
|
ST Rose Pwd Clinton County |
1,688 | 6 | 3 | |
|
Port Byron Port Byron · Rock Island County |
1,668 | 4 | 4 | |
|
Pontiac Correctional Center Pontiac · Livingston County |
1,665 | 4 | 1 | |
|
Eaton Pwd Crawford County |
1,655 | 4 | 3 | |
|
Benld Benld · Macoupin County |
1,612 | 2 | 1 | |
|
Kincaid Christian County |
1,561 | 2 | 2 | |
|
Erie Erie · Whiteside County |
1,479 | 3 | 2 | |
|
Exxon Mobil Oil Refinery Will County |
1,450 | 5 | 2 | |
|
Silvis Heights Water Corp Rock Island County |
1,450 | 7 | 3 | |
|
Hilltop MHP Bloomington · McLean County |
1,360 | 7 | 2 | |
|
Tilden Tilden · Randolph County |
1,350 | 2 | 1 | |
|
North Utica North Utica · LaSalle County |
1,323 | 3 | 0 | |
|
Barry Barry · Pike County |
1,318 | 2 | 1 | |
|
Milford Milford · Iroquois County |
1,306 | 5 | 2 | |
|
Good Shepherd Hospital Lake County |
1,290 | 8 | 2 | |
|
Chrisman Chrisman · Edgar County |
1,273 | 3 | 3 | |
|
Mound Pwd St. Clair County |
1,243 | 4 | 3 | |
|
Prospect Heights Plaza Cook County |
1,240 | 6 | 2 | |
|
Hillcrest Hillcrest · Ogle County |
1,224 | 5 | 0 | |
|
Downs Downs · McLean County |
1,201 | 3 | 1 | |
|
Chatsworth Chatsworth · Livingston County |
1,200 | 3 | 1 | |
|
Toulon Toulon · Stark County |
1,193 | 3 | 3 | |
|
Ferges Water District Williamson County |
1,185 | 2 | 2 | |
|
IL American-Andalusia Andalusia · Rock Island County |
1,184 | 1 | 1 | |
|
Mechanicsburg-Buffalo Water Commission Sangamon County |
1,170 | 7 | 2 | |
|
New Berlin Sangamon County |
1,150 | 6 | 2 | |
|
Royalton Royalton · Franklin County |
1,118 | 6 | 0 | |
|
Irvington Irvington · Washington County |
1,081 | 1 | 1 | |
|
Elkville Elkville · Jackson County |
1,068 | 3 | 0 | |
|
Coulterville Coulterville · Randolph County |
1,052 | 2 | 0 | |
|
Washburn Washburn · Woodford County |
1,032 | 2 | 2 | |
|
Central High School Kane County |
1,001 | 6 | 2 | |
|
Gifford Gifford · Champaign County |
911 | 2 | 0 | |
|
Quentin Road Bible Baptist School Lake County |
910 | 2 | 1 | |
|
Argenta Argenta · Macon County |
900 | 4 | 1 | |
|
Galatia Galatia · Saline County |
887 | 5 | 1 | |
|
Wyanet Wyanet · Bureau County |
886 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Lead and Copper Rule (LCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Lead and Copper Rule (LCR) 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.