Public water system · WI6630259
ActiveOntario Waterworks
Community water system in Vernon County, Wisconsin, drawing primarily on groundwater.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
554
Service connections
241
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
Violations & enforcement
| Began | Violation | Contaminant | Health-based | Status |
|---|---|---|---|---|
| 2025-07-01 | 3A | 8000 | No | Resolved |
| 2025-01-01 | 27 | 2456 | No | Archived |
| 2025-01-01 | 27 | 2950 | No | Archived |
| 2024-10-17 | 75 | 7500 | No | Unaddressed |
| 2024-10-17 | 2E | 5200 | Yes | Resolved |
| 2009-04-01 | 24 | 3100 | No | Resolved |
| 2009-04-01 | 27 | 0999 | No | Resolved |
| 2006-06-01 | 22 | 3100 | Yes | Resolved |
| 2001-10-01 | 22 | 3100 | Yes | Resolved |
| 1998-06-01 | 24 | 3100 | No | Resolved |
| 1998-05-01 | 22 | 3100 | Yes | Resolved |
| 1997-10-01 | 22 | 3100 | Yes | Resolved |
Ontario Waterworks: frequently asked questions
Is Ontario Waterworks's water safe to drink?
Ontario Waterworks is an active community water system regulated under the Safe Drinking Water Act, overseen by the WI 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 Ontario Waterworks?
Ontario Waterworks (PWSID WI6630259) is a local government-owned community water system, regulated by the WI state drinking water program.
How many people does Ontario Waterworks serve?
Ontario Waterworks reports serving 554 people through 241 service connections in Vernon County, Wisconsin.
Where does Ontario Waterworks get its water?
EPA SDWIS lists this system's primary water source as groundwater.
Other water systems in Vernon County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Vernon County Cons Pwsd 1 | Vernon | 9,615 | Community | Groundwater |
| Nevada Pws | Vernon | 8,198 | Community | Groundwater |
| Viroqua Waterworks | Vernon | 4,362 | Community | Groundwater |
| Westby Waterworks | Vernon | 2,400 | Community | Groundwater |
| Vernon County Pwsd 2 | Vernon | 1,800 | Community | Groundwater |
| Hillsboro Waterworks | Vernon | 1,325 | Community | Groundwater |