Public water system · CA2210924
ActiveYosemite West Water System
Community water system in Mariposa County, California, drawing primarily on groundwater.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
420
Service connections
185
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
Violations & enforcement
| Began | Violation | Contaminant | Health-based | Status |
|---|---|---|---|---|
| 2025-10-01 | 52 | 5000 | No | Unaddressed |
| 2012-01-01 | 03 | 1040 | No | Resolved |
| 2011-07-01 | 22 | 3100 | Yes | Resolved |
| 2010-10-01 | 22 | 3100 | Yes | Resolved |
| 2009-09-01 | 22 | 3100 | Yes | Resolved |
| 2008-09-01 | 22 | 3100 | Yes | Resolved |
| 2006-02-01 | 23 | 3100 | No | Resolved |
| 2004-03-01 | 52 | 5000 | No | Resolved |
| 2003-01-01 | 03 | 1040 | No | Resolved |
| 2002-06-01 | 22 | 3100 | Yes | Resolved |
| 2001-01-01 | 03 | 1040 | No | Resolved |
| 1996-12-01 | 22 | 3100 | Yes | Resolved |
Yosemite West Water System: frequently asked questions
Is Yosemite West Water System's water safe to drink?
Yosemite West Water System is an active community water system regulated under the Safe Drinking Water Act, overseen by the CA 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 Yosemite West Water System?
Yosemite West Water System (PWSID CA2210924) is a local government-owned community water system, regulated by the CA state drinking water program.
How many people does Yosemite West Water System serve?
Yosemite West Water System reports serving 420 people through 185 service connections in Mariposa County, California.
Where does Yosemite West Water System get its water?
EPA SDWIS lists this system's primary water source as groundwater.
Other water systems in Mariposa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Yosemite Nps-Glacier Point | Mariposa | 4,000 | Transient non-community | Surface water |
| Blm-Briceburg Water System | Mariposa | 3,196 | Transient non-community | Groundwater |
| Mariposa Public Utility Dist | Mariposa | 2,000 | Community | Surface water |
| Yosemite Nps-Bridalveil Fall | Mariposa | 1,163 | Transient non-community | Groundwater |
| Mid - Mc Swain Rec Area | Mariposa | 1,119 | Transient non-community | Surface water |
| Yosemite Nps-Yosemite Valley | Mariposa | 1,000 | Community | Groundwater |