All water systems in Illinois
724 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Wampum Lake HP 6244 Cook County |
25 | 0 | 0 | |
|
Wampum Lake HP 6276 Cook County |
25 | 0 | 0 | |
|
Wampum Lake HP 6278 Cook County |
25 | 0 | 0 | |
|
Wilderness Lake Campground Clark County |
25 | 0 | 0 | |
|
Wilderness Lake Grocery Clark County |
25 | 0 | 0 | |
|
Wolf Lake Flying Field HP 5067 Cook County |
25 | 0 | 0 | |
|
Wolf Lake Tavern Mason County |
25 | 0 | 0 | |
|
Wolf Lake Tavern Mason County |
25 | 0 | 0 | |
|
Wonder Lake Bible Church McHenry County |
25 | 0 | 0 | |
|
Wonder Lake Inn McHenry County |
25 | 0 | 0 | |
|
Wooster Lake Park Lake County |
25 | 0 | 0 | |
|
Wooster Lake Park Lake County |
25 | 0 | 0 | |
|
Young's Lake Warren County |
25 | 0 | 0 | |
|
Your Place & Lake Recreation Lee County |
25 | 0 | 0 | |
|
Lakeview MHP Ogle County |
24 | 0 | 0 | |
|
Four Lakes Subdivision LaSalle County |
12 | 0 | 0 | |
|
Lakeview Hills Water Supply Company Whiteside County |
10 | 1 | 1 | |
|
Rosing Lakeview Water Association Antioch · Lake County |
1 | 0 | 0 | |
|
Chain O Lakes/deerpath #5 Lake County |
0 | 2 | 1 | |
|
Lakemoor Diner McHenry County |
0 | 0 | 0 | |
|
Lakeview Estates MHP Rock Island County |
0 | 0 | 0 | |
|
Mallard Lake F P (hw-13) DuPage County |
0 | 0 | 0 | |
|
Rice Lake Wildlife Area Fulton County |
0 | 2 | 2 | |
|
Wokinis Lakeside Inn Lake County |
0 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules currently in violation at EPA's latest data refresh.
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.