Chlorine (MRDL) violations in Illinois
203 active public water systems in Illinois had a Chlorine (MRDL) violation in the past three years, 22 of them in the latest quarter of EPA's data. What Chlorine (MRDL) is and why it matters.
Systems with a Chlorine (MRDL) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Wood Dale Wood Dale · DuPage County |
14,012 | 3 | 1 | |
|
Captain James a Lovell Fhcc Lake County |
12,100 | 6 | 2 | |
|
Advocate Christ Medical Center Cook County |
10,000 | 5 | 1 | |
|
Lutheran General Hospital Cook County |
3,400 | 6 | 1 | |
|
Highland Park Hospital Lake County |
2,800 | 5 | 2 | |
|
South Palos Twsp Sanitary Dist Cook County |
2,800 | 3 | 0 | |
|
Silvis Heights Water Corp Rock Island County |
1,450 | 7 | 3 | |
|
Crystal Lawns Addition Improvement Assoc Joliet · Will County |
1,435 | 3 | 1 | |
|
Sunset MHP Cook County |
1,400 | 2 | 0 | |
|
Wenona Wenona · Marshall County |
974 | 6 | 1 | |
|
Stewardson Stewardson · Shelby County |
734 | 3 | 0 | |
|
Constellation Clinton Power Station De Witt County |
515 | 5 | 0 | |
|
Heritage of Rantoul Rantoul · Champaign County |
500 | 2 | 0 | |
|
Perry Pike County |
388 | 2 | 0 | |
|
Mid-American Air Center Lawrence County |
350 | 2 | 0 | |
|
Fields Hill Improvement Association LaSalle County |
312 | 7 | 4 | |
|
Sunnyland Subdivision Joliet · Will County |
300 | 4 | 2 | |
|
Woodland Acres MHC Urbana · Champaign County |
230 | 4 | 0 | |
|
Versa Press INC Woodford County |
200 | 8 | 1 | |
|
Horizons Child Care Fayette County |
170 | 8 | 1 | |
|
Criswell Court MHP Joliet · Will County |
94 | 8 | 3 | |
|
Prairieview Jr. High School Champaign County |
67 | 6 | 1 | |
|
Carol Stream Carol Stream · DuPage County |
39,854 | 3 | 0 | |
|
Oswego Oswego · Kendall County |
38,169 | 1 | 0 | |
|
Batavia Batavia · Kane County |
26,098 | 2 | 0 | |
|
Lockport Lockport · Will County |
23,100 | 4 | 0 | |
|
Crest Hill Crest Hill · Will County |
20,223 | 10 | 2 | |
|
LA Grange Park La Grange Park · Cook County |
13,011 | 2 | 0 | |
|
Plano Plano · Kendall County |
12,600 | 3 | 0 | |
|
Robinson-Palestine Water Commission Crawford County |
11,331 | 3 | 0 | |
|
Waterloo Waterloo · Monroe County |
10,190 | 7 | 0 | |
|
LA Salle La Salle · LaSalle County |
9,700 | 4 | 0 | |
|
Harrisburg Harrisburg · Saline County |
8,524 | 6 | 1 | |
|
Silvis Silvis · Rock Island County |
7,473 | 7 | 1 | |
|
Mount Carmel Mount Carmel · Wabash County |
7,015 | 5 | 0 | |
|
Mahomet Mahomet · Champaign County |
7,000 | 3 | 0 | |
|
Chillicothe Chillicothe · Peoria County |
6,660 | 5 | 0 | |
|
Illinois State University-Normal Normal · McLean County |
6,600 | 4 | 0 | |
|
Northshore University Evanston Cook County |
6,300 | 4 | 1 | |
|
Robbins Robbins · Cook County |
5,415 | 6 | 3 | |
|
U of I Chicago Medical Center Cook County |
5,000 | 4 | 1 | |
|
Milan Milan · Rock Island County |
4,945 | 3 | 1 | |
|
Tuscola Tuscola · Douglas County |
4,875 | 4 | 1 | |
|
Burnham Burnham · Cook County |
3,989 | 7 | 3 | |
|
Greene County Rwd Greene County |
3,786 | 3 | 0 | |
|
Mount Sterling Mount Sterling · Brown County |
3,271 | 2 | 0 | |
|
Northshore Univ Glenbrook Cook County |
3,200 | 4 | 1 | |
|
Arcola Arcola · Douglas County |
2,927 | 4 | 0 | |
|
Albion Albion · Edwards County |
2,839 | 4 | 0 | |
|
Bridgeport Bridgeport · Lawrence County |
2,572 | 4 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Chlorine (MRDL), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Chlorine (MRDL) 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.