Public water system · IL1110900
ActiveUnion
Community water system in McHenry County, Illinois, drawing primarily on groundwater.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
594
Service connections
276
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
Violations & enforcement
| Began | Violation | Contaminant | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | 4H | 5200 | No | Unaddressed |
| 2025-07-01 | 71 | 7000 | No | Resolved |
| 2010-01-21 | 75 | 7500 | No | Resolved |
| 2009-07-01 | 02 | 4010 | Yes | Resolved |
| 2009-04-01 | 02 | 4010 | Yes | Resolved |
| 2007-03-23 | 75 | 7500 | No | Resolved |
| 2007-03-23 | 76 | 7500 | No | Resolved |
| 2006-08-20 | 75 | 7500 | No | Resolved |
| 2006-08-20 | 76 | 7500 | No | Resolved |
| 2006-07-01 | 02 | 4010 | Yes | Resolved |
| 2006-04-01 | 02 | 4010 | Yes | Resolved |
| 2005-10-01 | 03 | 4010 | No | Resolved |
Union: frequently asked questions
Is Union's water safe to drink?
Union 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 Union?
Union (PWSID IL1110900) is a local government-owned community water system, regulated by the IL state drinking water program.
How many people does Union serve?
Union reports serving 594 people through 276 service connections in McHenry County, Illinois.
Where does Union 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 |