All water systems in Illinois
724 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Hamilton Lakes DuPage County |
5,000 | 0 | 0 | |
|
Liesure Lake Whiteside County |
5,000 | 0 | 0 | |
|
Liesure Lake Whiteside County |
5,000 | 0 | 0 | |
|
Fox Lake Plant 2 Lake County |
3,600 | 0 | 0 | |
|
Four Lakes Vlg Sbdv Lisle Twp · DuPage County |
2,600 | 0 | 0 | |
|
Providence at Painted Lakes Lake Villa · Lake County |
1,650 | 0 | 0 | |
|
Countryside Manor Sbdv Lake CO PW Lake County |
1,518 | 0 | 0 | |
|
Union Pacific Railroad North Lake · Cook County |
1,500 | 0 | 0 | |
|
Heritage Lakes Subdivision Mackinaw Twp · Tazewell County |
1,341 | 0 | 0 | |
|
Lake Park East H S #108 DuPage County |
1,241 | 0 | 0 | |
|
Four Lakes Vlg Condo Assn 1 Lisle Twp · DuPage County |
1,200 | 0 | 0 | |
|
Shadow Lakes Resort Reed Twp · Will County |
1,200 | 0 | 0 | |
|
Tower Lakes-Country Club Tower Lakes · Lake County |
1,200 | 0 | 0 | |
|
Lake Mattoon Pwd Coles County |
1,100 | 0 | 0 | |
|
Lake in the Woods Sbdv Downers Gr Twp · DuPage County |
1,060 | 0 | 0 | |
|
Grayslake Outdoor Theater Lake County |
1,000 | 0 | 0 | |
|
Lake of the Woods Champaign County |
1,000 | 0 | 0 | |
|
Lake Run Condominium Assoc a Cook County |
1,000 | 0 | 0 | |
|
Lake Run Condominium Assoc a Cook County |
1,000 | 0 | 0 | |
|
Lake Run Condominium Assoc B Cook County |
1,000 | 0 | 0 | |
|
Lake Run Condominium Assoc B Cook County |
1,000 | 0 | 0 | |
|
Lake Shanon INC Will County |
1,000 | 0 | 0 | |
|
Lake Shanon INC Will County |
1,000 | 0 | 0 | |
|
Island Lake Shopping Ctr Lake County |
850 | 0 | 0 | |
|
Lake Run Apts Northfield Twp · Cook County |
700 | 0 | 0 | |
|
Ports of Sullivan Lake Assoc Lake County |
638 | 0 | 0 | |
|
Bradley Road System Lake CO PW Waukegan · Lake County |
612 | 0 | 0 | |
|
Chain-O-Lakes State Park Lake County |
600 | 0 | 0 | |
|
Chain-O-Lakes State Park Lake County |
600 | 0 | 0 | |
|
Chain-O-Lakes State Park Lake County |
600 | 0 | 0 | |
|
Chain-O-Lakes State Park Lake County |
600 | 0 | 0 | |
|
Chain-O-Lakes State Park Lake County |
600 | 0 | 0 | |
|
Lake Blvd Pwd Unspec Pl In Co · Vermilion County |
600 | 0 | 0 | |
|
Lake County North Liber Lake County · Lake County |
518 | 0 | 0 | |
|
Crystal Lake Ambutal McHenry County |
500 | 0 | 0 | |
|
Grayslake Family Outdoor Lake County |
500 | 0 | 0 | |
|
Grayslake Family Outdoor Lake County |
500 | 0 | 0 | |
|
Lake Campalot Randolph County |
500 | 0 | 0 | |
|
Lake Marie Camp (15081) Lake County |
500 | 1 | 1 | |
|
Westlake Fertilizer Sangamon County |
500 | 0 | 0 | |
|
Westlake Fertilizer Sangamon County |
500 | 0 | 0 | |
|
Big Bend Lake GR 1 HP 1115 Cook County |
400 | 0 | 0 | |
|
Big Bend Lake GR 1 HP 1116 Cook County |
400 | 0 | 0 | |
|
Big Bend Lake GR 1 HP 1116 Cook County |
400 | 0 | 0 | |
|
Chain-O-Lakes State Park Lake County |
400 | 0 | 0 | |
|
Chain-O-Lakes State Park Lake County |
400 | 0 | 0 | |
|
Fphp Tampier Lake West 5223 Cook County |
400 | 0 | 0 | |
|
Hambone Lake 5066 Cook County |
400 | 0 | 0 | |
|
Hambone Lake 5066 Cook County |
400 | 0 | 0 | |
|
Ida Lake GR 0 HP 4208 Cook County |
400 | 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.