Public water system · IL1115750
ActiveWonder Lake
Community water system in McHenry County, Illinois, drawing primarily on groundwater.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,870
Service connections
1,548
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
Violations & enforcement
| Began | Violation | Contaminant | Health-based | Status |
|---|---|---|---|---|
| 2025-07-01 | 52 | 5000 | No | Unaddressed |
| 2025-04-01 | 66 | 5000 | No | Resolved |
| 2024-02-10 | 75 | 7500 | No | Resolved |
| 2023-04-02 | 57 | 5000 | Yes | Resolved |
| 2022-01-01 | 03 | 1040 | No | Resolved |
| 2005-03-12 | 75 | 7500 | No | Resolved |
| 2005-03-12 | 76 | 7500 | No | Resolved |
| 2004-10-01 | 52 | 5000 | No | Resolved |
| 2004-04-01 | 27 | 2950 | No | Resolved |
| 2004-04-01 | 27 | 2456 | No | Resolved |
| 2004-01-01 | 24 | 3100 | No | Archived |
| 2002-05-01 | 23 | 3100 | No | Archived |
Wonder Lake: frequently asked questions
Is Wonder Lake's water safe to drink?
Wonder Lake is an active community water system regulated under the Safe Drinking Water Act, overseen by the IL state drinking water program. EPA SDWA violation and enforcement records for this system are being added to AquaCensus from EPA ECHO; consult EPA ECHO or your annual Consumer Confidence Report for its current compliance status.
Who runs Wonder Lake?
Wonder Lake (PWSID IL1115750) is a local government-owned community water system, regulated by the IL state drinking water program.
How many people does Wonder Lake serve?
Wonder Lake reports serving 3,870 people through 1,548 service connections in McHenry County, Illinois.
Where does Wonder Lake get its water?
EPA SDWIS lists this system's primary water source as groundwater.
Other water systems in McHenry County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Crystal Lake | McHenry | 40,661 | Community | Groundwater |
| Algonquin | McHenry | 30,700 | Community | Groundwater |
| Lake in the Hills | McHenry | 28,661 | Community | Groundwater |
| Huntley | McHenry | 28,495 | Community | Groundwater |
| Woodstock | McHenry | 25,630 | Community | Groundwater |
| Mchenry | McHenry | 22,335 | Community | Groundwater |