Nitrate violations in Illinois
613 active public water systems in Illinois had a Nitrate violation in the past three years, 6 of them still unresolved. What Nitrate is and why it matters.
Systems with a Nitrate violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Staunton Staunton · Macoupin County |
5,756 | 4 | 0 | |
|
Jackson Creek Fellowship Will County |
150 | 1 | 0 | |
|
Sheridan Tobacco & Spirits, LLC LaSalle County |
62 | 3 | 1 | |
|
Sheridan Elevator, INC LaSalle County |
60 | 1 | 0 | |
|
Walnut Grove MHC Champaign County |
40 | 5 | 0 | |
|
Spring Lake Conservation Area (55905) Tazewell County |
25 | 3 | 1 | |
|
Elk Grove Village Elk Grove · Cook County |
31,802 | 4 | 1 | |
|
East Peoria East Peoria · Tazewell County |
22,484 | 2 | 0 | |
|
Lindenhurst Lindenhurst · Lake County |
14,500 | 3 | 0 | |
|
Richton Park Richton Park · Cook County |
12,504 | 5 | 3 | |
|
Sugar Grove Sugar Grove · Kane County |
11,243 | 1 | 0 | |
|
Highland Highland · Madison County |
10,674 | 3 | 0 | |
|
Waterloo Waterloo · Monroe County |
10,190 | 7 | 0 | |
|
IL American-Whispering Hills McHenry County |
8,300 | 4 | 0 | |
|
Rockton Rockton · Winnebago County |
7,863 | 2 | 0 | |
|
Rock Island Arsenal, US Army Rock Island County |
7,800 | 2 | 0 | |
|
Southeast Regional Water Facility DuPage County |
6,940 | 1 | 0 | |
|
Hillsboro Hillsboro · Montgomery County |
4,402 | 3 | 0 | |
|
Bridgeport Bridgeport · Lawrence County |
2,572 | 4 | 0 | |
|
Jbs Corporation Cass County |
2,000 | 7 | 1 | |
|
Southeast Joliet SD Joliet · Will County |
2,000 | 8 | 3 | |
|
Steeleville Steeleville · Randolph County |
1,960 | 5 | 2 | |
|
Steeple Run Sbdv DuPage County |
1,931 | 1 | 0 | |
|
ST Rose Pwd Clinton County |
1,688 | 6 | 3 | |
|
IL American-Westlake Loves Park · Winnebago County |
1,493 | 1 | 0 | |
|
Capron Capron · Boone County |
1,343 | 3 | 0 | |
|
Riverdale School District #100 Rock Island County |
1,340 | 10 | 0 | |
|
Assumption Assumption · Christian County |
1,315 | 4 | 2 | |
|
Blue Mound Blue Mound · Macon County |
1,300 | 5 | 3 | |
|
Wyoming Wyoming · Stark County |
1,300 | 4 | 1 | |
|
Prospect Heights Plaza Cook County |
1,240 | 6 | 2 | |
|
Oquawka Oquawka · Henderson County |
1,125 | 1 | 0 | |
|
Griggsville Pike County |
1,097 | 3 | 1 | |
|
Percy Percy · Randolph County |
961 | 4 | 0 | |
|
Camp Duncan Pool Lake County |
960 | 4 | 2 | |
|
Camp Independence Lake County |
960 | 4 | 2 | |
|
Camp Henry Horner/pool Pump House Lake County |
920 | 3 | 2 | |
|
Olympia School McLean County |
918 | 7 | 0 | |
|
The Chapel (147876) Lake County |
900 | 1 | 0 | |
|
ST Bede Church Lake County |
850 | 1 | 0 | |
|
Pride of the Prairie Rest Area Macon County |
800 | 4 | 1 | |
|
Caledonia School Boone County |
750 | 7 | 1 | |
|
Silver Springs State Park (94185) Kendall County |
750 | 2 | 1 | |
|
Streator Baptist Camp -Office Well LaSalle County |
750 | 1 | 0 | |
|
White Pines Forest ST Park-Cedar Ridge Ogle County |
750 | 1 | 0 | |
|
White Pines Forest ST Park-Lodge/cabins Ogle County |
750 | 1 | 0 | |
|
IL American-Bahl Water Company Jo Daviess County |
700 | 7 | 1 | |
|
Turtle Creek Rest Area Winnebago County |
700 | 2 | 0 | |
|
Ferson Creek Elem Schl-Cusd 303 Kane County |
667 | 6 | 1 | |
|
Cordova Cordova · Rock Island County |
640 | 3 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrate, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrate 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. Retrieved from ECHO on Oct 11, 2026.