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 |
|---|---|---|---|---|
|
Baxter Health Care/hanline Lake County |
2,500 | 3 | 0 | |
|
Northshore University Skokie Cook County |
2,500 | 4 | 1 | |
|
Catlin Catlin · Vermilion County |
2,380 | 4 | 2 | |
|
Poplar Grove Poplar Grove · Boone County |
2,372 | 3 | 0 | |
|
Jbs Corporation Cass County |
2,000 | 7 | 1 | |
|
Southeast Joliet SD Joliet · Will County |
2,000 | 8 | 3 | |
|
Waubonsee Community College Kane County |
2,000 | 7 | 0 | |
|
Wonder Lake (niu) McHenry County |
1,950 | 2 | 0 | |
|
South Roxana South Roxana · Madison County |
1,891 | 6 | 1 | |
|
Poplar Grove South Poplar Grove · Boone County |
1,877 | 5 | 1 | |
|
Kaneland High School Kane County |
1,800 | 5 | 0 | |
|
Gilman Gilman · Iroquois County |
1,793 | 3 | 1 | |
|
Germantown Germantown · Clinton County |
1,537 | 5 | 1 | |
|
Maple Park Maple Park · Kane County |
1,484 | 6 | 1 | |
|
Exxon Mobil Oil Refinery Will County |
1,450 | 5 | 2 | |
|
Pembroke Township Kankakee County |
1,410 | 4 | 1 | |
|
Onarga Onarga · Iroquois County |
1,409 | 3 | 0 | |
|
Capron Capron · Boone County |
1,343 | 3 | 0 | |
|
Riverdale School District #100 Rock Island County |
1,340 | 10 | 0 | |
|
Ashland Ashland · Cass County |
1,333 | 3 | 0 | |
|
Rossville Rossville · Vermilion County |
1,331 | 3 | 0 | |
|
Milford Milford · Iroquois County |
1,306 | 5 | 2 | |
|
Lake Williamson Christian Center Macoupin County |
1,250 | 4 | 0 | |
|
Cuba Cuba · Fulton County |
1,232 | 2 | 0 | |
|
Hillcrest Hillcrest · Ogle County |
1,224 | 5 | 0 | |
|
Mechanicsburg-Buffalo Water Commission Sangamon County |
1,170 | 7 | 2 | |
|
Atwood Atwood · Douglas County |
1,155 | 2 | 0 | |
|
New Berlin Sangamon County |
1,150 | 6 | 2 | |
|
Malta Malta · DeKalb County |
1,143 | 3 | 0 | |
|
IL American-Ferson Creek Kane County |
1,134 | 4 | 0 | |
|
Suburban Apartments (de Kalb Univ Dvl) DeKalb County |
1,050 | 5 | 1 | |
|
Pleasant Hill Pleasant Hill · Pike County |
1,004 | 4 | 0 | |
|
Stateville Correctional Center Joliet · Will County |
992 | 5 | 2 | |
|
Ramsey Ramsey · Fayette County |
966 | 3 | 0 | |
|
Wataga Wataga · Knox County |
965 | 5 | 1 | |
|
Rapids City Cordova · Rock Island County |
962 | 3 | 1 | |
|
Clay City Clay City · Clay County |
957 | 3 | 0 | |
|
Atkinson Atkinson · Henry County |
955 | 4 | 1 | |
|
Spring Lakes MHP Cook County |
940 | 1 | 0 | |
|
Olympia School McLean County |
918 | 7 | 0 | |
|
Oreana Oreana · Macon County |
892 | 3 | 1 | |
|
Albany Albany · Whiteside County |
846 | 7 | 0 | |
|
Shannon Shannon · Carroll County |
801 | 1 | 0 | |
|
Adams County Water District NO 1 Adams County |
800 | 2 | 0 | |
|
Braceville Braceville · Grundy County |
800 | 6 | 1 | |
|
Pearl City Pearl City · Stephenson County |
790 | 4 | 2 | |
|
Poplar Grove West-Countryside Poplar Grove · Boone County |
790 | 3 | 0 | |
|
Farmersville Farmersville · Montgomery County |
784 | 3 | 1 | |
|
Menard Rural Water Coop Petersburg · Menard County |
753 | 4 | 1 | |
|
Keithsburg Keithsburg · Mercer County |
747 | 2 | 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.