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 |
|---|---|---|---|---|
|
IL American-Bahl Water Company Jo Daviess County |
700 | 7 | 1 | |
|
Westfield Westfield · Clark County |
678 | 6 | 2 | |
|
Ashmore Ashmore · Coles County |
637 | 8 | 0 | |
|
Creston Creston · Ogle County |
627 | 4 | 1 | |
|
Hutsonville Hutsonville · Crawford County |
613 | 3 | 1 | |
|
Cbre West Plaza Cook County |
600 | 1 | 0 | |
|
ST Francisville Saint Francisville · Lawrence County |
583 | 7 | 0 | |
|
Hopkins Park Pembroke · Kankakee County |
579 | 4 | 1 | |
|
Johnsburg JR High School McHenry County |
575 | 2 | 0 | |
|
Elkhart Logan County |
565 | 4 | 0 | |
|
Spoon River Valley School Fulton County |
560 | 3 | 0 | |
|
Serena Community School LaSalle County |
555 | 3 | 0 | |
|
Lyndon Lyndon · Whiteside County |
537 | 4 | 0 | |
|
Chadwick Chadwick · Carroll County |
523 | 2 | 1 | |
|
Beecher City Beecher City · Effingham County |
500 | 6 | 1 | |
|
Lake Shannon Essex · Kankakee County |
500 | 5 | 0 | |
|
Sauk Valley College Lee County |
500 | 2 | 0 | |
|
North Meadow Village MHP Normal · McLean County |
495 | 6 | 3 | |
|
Woodland a and B MHP Rock Island County |
490 | 3 | 0 | |
|
Cornerstone Christian Academy McLean County |
475 | 5 | 0 | |
|
Beaverville Beaverville · Iroquois County |
450 | 5 | 0 | |
|
Oak Lawn MHP Boone County |
450 | 3 | 0 | |
|
Rolling Meadows MHC Ogle County |
447 | 2 | 0 | |
|
DE Land De Land · Piatt County |
446 | 5 | 1 | |
|
Sabic Innovative Plastics LaSalle County |
440 | 1 | 0 | |
|
Hecker Hecker · Monroe County |
429 | 5 | 2 | |
|
Mount Morris Estates MHP Ogle County |
425 | 2 | 0 | |
|
Ogden Gardens Subdivision Kane County |
420 | 4 | 0 | |
|
Roberts Roberts · Ford County |
367 | 2 | 0 | |
|
Ilcv Candle Mhp, LLC Coal Valley · Rock Island County |
340 | 4 | 1 | |
|
Alma Alma · Marion County |
336 | 5 | 2 | |
|
Woodland Woodland · Iroquois County |
319 | 4 | 1 | |
|
Aqua Illinois-Oakview Joliet · Will County |
312 | 2 | 0 | |
|
Little York Little York · Warren County |
304 | 3 | 0 | |
|
Oak Ridge Sanitary District Metamora · Woodford County |
300 | 5 | 1 | |
|
Stepan Company Will County |
300 | 5 | 0 | |
|
Valley View School McHenry County |
300 | 5 | 0 | |
|
Hindsboro Hindsboro · Douglas County |
296 | 3 | 0 | |
|
Concord Concord · Morgan County |
295 | 4 | 0 | |
|
Rock City Rock City · Stephenson County |
293 | 2 | 0 | |
|
Brocton Brocton · Edgar County |
288 | 6 | 2 | |
|
Biggsville Biggsville · Henderson County |
273 | 2 | 0 | |
|
Elliott Elliott · Ford County |
269 | 3 | 0 | |
|
Harding Grade School LaSalle County |
250 | 4 | 1 | |
|
Wallace Consol Comm School LaSalle County |
250 | 4 | 0 | |
|
Aqua Illinois-Skyline Kankakee County |
249 | 3 | 0 | |
|
Rockford Mhc, LLC Rockford · Winnebago County |
240 | 3 | 0 | |
|
Broughton Water District Broughton · Hamilton County |
235 | 4 | 0 | |
|
Oakford Oakford · Menard County |
234 | 3 | 1 | |
|
Sheridan Grade School LaSalle County |
227 | 3 | 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.