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 |
|---|---|---|---|---|
|
Maquon Maquon · Knox County |
218 | 3 | 0 | |
|
Bone Gap Bone Gap · Edwards County |
209 | 5 | 1 | |
|
Cortland Corners MHP DeKalb County |
205 | 10 | 3 | |
|
The Preserve at Long Grove Long Grove · Lake County |
204 | 5 | 1 | |
|
Conagra Vermilion County |
200 | 9 | 1 | |
|
Loders-Croklaan Will County |
200 | 3 | 0 | |
|
Mill Point MHP Secor · Woodford County |
200 | 5 | 1 | |
|
Paradise Manor MHP Rock Island County |
200 | 3 | 0 | |
|
Garrett Garrett · Douglas County |
198 | 3 | 0 | |
|
Smg Lynnville Lynnville · Morgan County |
193 | 5 | 2 | |
|
Maclean Fogg M1 Metform Carroll County |
192 | 5 | 1 | |
|
Oak Park Estates Putnam County |
185 | 2 | 0 | |
|
Rockbridge Rockbridge · Greene County |
180 | 4 | 0 | |
|
Sciota Sciota · McDonough County |
180 | 2 | 0 | |
|
East Dubuque Nitrogen Fertilizers Jo Daviess County |
165 | 3 | 0 | |
|
Hillsdale Estates, LLC Rock Island County |
163 | 3 | 0 | |
|
Evonik Corporation Peoria County |
150 | 4 | 1 | |
|
Miller Comm Consol Sch 210 LaSalle County |
150 | 2 | 0 | |
|
Ineos Styrolution America LLC Will County |
146 | 5 | 0 | |
|
Aqua Illinois-Summerdale Norridge · Cook County |
145 | 2 | 0 | |
|
Wood Dale Estates DuPage County |
145 | 4 | 0 | |
|
Meadows Mennonite Home McLean County |
140 | 8 | 1 | |
|
ST Marys School Bored Well Peoria County |
140 | 9 | 1 | |
|
Media Media · Henderson County |
139 | 2 | 0 | |
|
Oak Grove MHP Rock Island County Rock Island County |
138 | 3 | 1 | |
|
Old Salem Chautauqua Menard County |
128 | 3 | 1 | |
|
Eagarville Eagerville · Macoupin County |
127 | 8 | 0 | |
|
Teasdale Foods Vermilion County |
125 | 6 | 0 | |
|
Valley View Manor Champaign County |
120 | 5 | 1 | |
|
Winding Creek Estates Rock Island County |
120 | 3 | 0 | |
|
Harmon Harmon · Lee County |
111 | 5 | 1 | |
|
Deans Illinois Dairies Winnebago County |
110 | 6 | 0 | |
|
Jeisyville Jeiseyville · Christian County |
102 | 5 | 1 | |
|
LA Salle County Nursing Home LaSalle County |
100 | 4 | 0 | |
|
Muller-Pinehurst Dairy Winnebago County |
100 | 5 | 0 | |
|
Nouryon Surface Chemistry LLC Grundy County |
100 | 2 | 0 | |
|
Park Meadowland West MHP Boone County |
100 | 3 | 0 | |
|
Nuestro Queso Exterior Well Stephenson County |
91 | 4 | 1 | |
|
Nuestro Queso Interior Well Stephenson County |
91 | 2 | 0 | |
|
Capron MHP Boone County |
90 | 4 | 0 | |
|
Nussbaum Transportation McLean County |
85 | 5 | 2 | |
|
River City Mhc, LLC Machesney Park · Winnebago County |
83 | 2 | 0 | |
|
Carroll Heights Utilities Company Carroll County |
80 | 5 | 2 | |
|
Trinity Lutheran School Randolph County |
80 | 9 | 1 | |
|
Rooks Creek Elementary School Livingston County |
66 | 10 | 1 | |
|
Cropsey Mutual Water Association McLean County |
65 | 7 | 2 | |
|
Dolan Education Center Winnebago County |
50 | 6 | 1 | |
|
Lindenwood Water Association Ogle County |
38 | 2 | 1 | |
|
Morningside Mobile Estates MHP Logan County |
34 | 3 | 0 | |
|
Donny Brook Estates Subdivision DeKalb County |
30 | 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.