Public water system · CA2210945
ActiveWildhaven Yosemite Water System
At a glance
Wildhaven Yosemite Water System (PWSID CA2210945) is an active transient non-community water system in Mariposa County, California. It reports serving 100 people through 17 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
100
Service connections
17
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Wildhaven Yosemite Water System compare with other water systems in Mariposa County?
By EPA's size categories, Wildhaven Yosemite Water System is a very small system (500 people or fewer). Mariposa County has 67 active public water systems. Its population served is well below the county average of 381 people per system, and accounts for 0.4% of the 25,508 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Wildhaven Yosemite Water System is about 31% below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. California has 3,016 active transient non-community water systems, 40% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Wildhaven Yosemite Water System?
EPA lists Wildhaven Yosemite Water System as privately owned. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 33 of the 67 active systems in Mariposa County (49%) are also privately owned.
Does Wildhaven Yosemite Water System have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Wildhaven Yosemite Water System. For the latest compliance status, check EPA ECHO for current compliance history.
Wildhaven Yosemite Water System: frequently asked questions
Who runs Wildhaven Yosemite Water System?
Wildhaven Yosemite Water System (PWSID CA2210945) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Wildhaven Yosemite Water System serve?
Wildhaven Yosemite Water System reports serving 100 people through 17 service connections in Mariposa County, California.
Where does Wildhaven Yosemite Water System get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Wildhaven Yosemite Water System have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Wildhaven Yosemite Water System's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Wildhaven Yosemite Water System's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Wildhaven Yosemite Water System is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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 |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Wildhaven Yosemite Water System, PWSID CA2210945, California”, https://aquacensus.com/water-systems/california/wildhaven-yosemite-water-system-ca2210945 (data as of October 1, 2026).