Nitrate violations in Illinois
613 active public water systems in Illinois had a Nitrate violation in the past three years, 6 of them in the latest quarter of EPA's data. What Nitrate is and why it matters.
Systems with a Nitrate violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Ashmore Ashmore · Coles County |
637 | 8 | 0 | |
|
Creston Creston · Ogle County |
627 | 4 | 1 | |
|
Kilbuck Creek Retreat Ogle County |
604 | 2 | 1 | |
|
Baker Koren Round Barn Will County |
600 | 2 | 0 | |
|
Harvest Baptist Church Well 3 Kendall County |
600 | 3 | 1 | |
|
Union-York Water District Clark County |
600 | 3 | 1 | |
|
ST Francisville Saint Francisville · Lawrence County |
583 | 7 | 0 | |
|
Lyndon Lyndon · Whiteside County |
537 | 4 | 0 | |
|
Citgo Dunkin Donuts Prospect Heights Cook County |
507 | 2 | 0 | |
|
Dunham Woods Riding Club Kane County |
500 | 3 | 1 | |
|
Dunkin Donuts Long Grove Lake County |
500 | 1 | 0 | |
|
Randall Oaks Park Comm Shelter Kane County |
500 | 2 | 1 | |
|
Spoon River Speedway Fulton County |
500 | 3 | 1 | |
|
Starved Rock State Park (94227) LaSalle County |
500 | 3 | 0 | |
|
Midland High School Marshall County |
410 | 5 | 1 | |
|
Blackberry Hill Congregation of JW Kendall County |
400 | 1 | 0 | |
|
ED Etnyre and Company Ogle County |
400 | 7 | 0 | |
|
Harvest Baptist Church Well 2 Kendall County |
400 | 2 | 0 | |
|
Hinckley-Big Rock Middle School Kane County |
400 | 5 | 0 | |
|
Schiller Woods 3070 Cook County |
400 | 3 | 1 | |
|
Schiller Woods 3102 Cook County |
400 | 3 | 1 | |
|
Schiller Woods W 3072 Cook County |
400 | 3 | 1 | |
|
Timber Pointe the Lodge McLean County |
400 | 3 | 1 | |
|
Gladstone Gladstone · Henderson County |
387 | 1 | 0 | |
|
Monroe Center School Old Well Ogle County |
380 | 5 | 0 | |
|
Silo Restaurant Lake County |
375 | 1 | 0 | |
|
ST Francis Xavier Church Kendall County |
375 | 1 | 0 | |
|
Jeffersonville (geff) Jeffersonville · Wayne County |
355 | 2 | 0 | |
|
Central Galilee United Methodist Church Cook County |
350 | 2 | 0 | |
|
Diamond Lake School Lake County |
350 | 3 | 0 | |
|
Rainbow Council Scout Res Main Grundy County |
350 | 2 | 0 | |
|
West Oak Middle School Lake County |
350 | 1 | 0 | |
|
Greater Quad City Auto Auction Rock Island County |
340 | 6 | 1 | |
|
Bristol Grade School Kendall County |
325 | 2 | 0 | |
|
Mancuso Village Park MHP New Millford · Winnebago County |
325 | 1 | 0 | |
|
Full Moon Restaurant Lake County |
315 | 3 | 1 | |
|
American Legion Post 703 Lake County |
300 | 1 | 0 | |
|
Calamity Janes Kane County |
300 | 1 | 0 | |
|
Crystal Lake Recreation Beach Whiteside County |
300 | 3 | 0 | |
|
Downers Grove Sportsman Club Grundy County |
300 | 2 | 1 | |
|
Fox Valley YMCA & Preschool Kendall County |
300 | 5 | 1 | |
|
Harvest Baptist Church Well 1 Kendall County |
300 | 2 | 0 | |
|
Lakes Country Club LaSalle County |
300 | 1 | 0 | |
|
Pearl Lake RV Resort Llc-Bathhouse Winnebago County |
300 | 3 | 1 | |
|
Pearl Lake RV Resort Llc-Clubhouse Winnebago County |
300 | 3 | 1 | |
|
YMCA Camp Winnebago Webvillion Winnebago County |
300 | 3 | 1 | |
|
YMCA Camp Winnebago-Standing Bear Well Winnebago County |
300 | 3 | 1 | |
|
Brocton Brocton · Edgar County |
288 | 6 | 2 | |
|
Deland Weldon Piatt County |
280 | 6 | 1 | |
|
Crabtree Nature Center Cook County |
273 | 3 | 1 |
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.