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 |
|---|---|---|---|---|
|
Cicero Cicero · Cook County |
83,000 | 4 | 1 | |
|
Des Plaines Des Plaines · Cook County |
60,675 | 3 | 2 | |
|
Berwyn Berwyn · Cook County |
57,250 | 3 | 0 | |
|
Lombard Lombard · DuPage County |
44,476 | 2 | 2 | |
|
ST Charles Saint Charles · Kane County |
33,081 | 2 | 2 | |
|
Lansing Lansing · Cook County |
29,076 | 4 | 3 | |
|
Maywood Maywood · Cook County |
24,090 | 4 | 2 | |
|
South Elgin South Elgin · Kane County |
23,648 | 4 | 2 | |
|
Deerfield Deerfield · Lake County |
19,196 | 3 | 1 | |
|
Lemont Lemont · Cook County |
18,513 | 1 | 1 | |
|
Round Lake Round Lake · Lake County |
18,430 | 2 | 0 | |
|
Charleston Charleston · Coles County |
17,286 | 5 | 2 | |
|
Midlothian Midlothian · Cook County |
14,819 | 1 | 1 | |
|
Antioch Antioch · Lake County |
14,175 | 2 | 1 | |
|
Western Springs Western Springs · Cook County |
13,629 | 3 | 1 | |
|
Taylorville Taylorville · Christian County |
12,806 | 3 | 2 | |
|
Kewanee Kewanee · Henry County |
12,509 | 2 | 1 | |
|
Richton Park Richton Park · Cook County |
12,504 | 5 | 3 | |
|
Captain James a Lovell Fhcc Lake County |
12,100 | 6 | 2 | |
|
Summit Summit · Cook County |
11,161 | 3 | 3 | |
|
Steger Steger · Cook County |
9,700 | 2 | 1 | |
|
Calumet Park Calumet Park · Cook County |
8,442 | 3 | 2 | |
|
Benton Benton · Franklin County |
8,104 | 5 | 1 | |
|
Broadview Broadview · Cook County |
7,847 | 4 | 3 | |
|
Silvis Silvis · Rock Island County |
7,473 | 7 | 1 | |
|
Duquoin Du Quoin · Perry County |
7,169 | 6 | 2 | |
|
Sandwich Sandwich · DeKalb County |
7,156 | 2 | 0 | |
|
Winthrop Harbor Winthrop Harbor · Lake County |
6,565 | 4 | 3 | |
|
Mill Creek Pwd Adams County |
5,755 | 1 | 0 | |
|
Northfield Northfield · Cook County |
5,751 | 1 | 1 | |
|
Lake Bluff Lake Bluff · Lake County |
5,600 | 2 | 1 | |
|
Robbins Robbins · Cook County |
5,415 | 6 | 3 | |
|
Highwood Highwood · Lake County |
5,335 | 1 | 1 | |
|
Marseilles Marseilles · LaSalle County |
5,061 | 4 | 3 | |
|
Olympia Fields Olympia Fields · Cook County |
4,922 | 3 | 1 | |
|
Sullivan Sullivan · Moultrie County |
4,729 | 1 | 0 | |
|
Pittsfield Pittsfield · Pike County |
4,697 | 1 | 0 | |
|
Lawrenceville Lawrenceville · Lawrence County |
4,524 | 7 | 2 | |
|
Hillsboro Hillsboro · Montgomery County |
4,402 | 3 | 0 | |
|
Sparta Sparta · Randolph County |
4,395 | 4 | 2 | |
|
Morrison Morrison · Whiteside County |
4,188 | 2 | 1 | |
|
Burnham Burnham · Cook County |
3,989 | 7 | 3 | |
|
South Chicago Heights South Chicago Heights · Cook County |
3,924 | 1 | 0 | |
|
Johnston City Johnston City · Williamson County |
3,509 | 4 | 0 | |
|
South Jacksonville South Jacksonville · Morgan County |
3,501 | 4 | 0 | |
|
Carlyle Carlyle · Clinton County |
3,373 | 4 | 1 | |
|
Western Wayne Water District Wayne City · Wayne County |
3,253 | 1 | 1 | |
|
East Dundee East Dundee · Kane County |
3,115 | 1 | 0 | |
|
Lakeside Pwd Jackson County |
3,065 | 4 | 0 | |
|
Dixmoor Dixmoor · Cook County |
2,973 | 5 | 4 |
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.