Public water system · CA5510504
ActiveYosemite Nps-White Wolf
At a glance
Yosemite Nps-White Wolf (PWSID CA5510504) is an active transient non-community water system in Tuolumne County, California. It reports serving 300 people through 5 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
300
Service connections
5
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Yosemite Nps-White Wolf compare with other water systems in Tuolumne County?
By EPA's size categories, Yosemite Nps-White Wolf is a very small system (500 people or fewer). Tuolumne County has 117 active public water systems. Its population served is about 58% below the county average of 706 people per system, and accounts for 0.4% of the 82,611 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 Yosemite Nps-White Wolf is about twice 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 Yosemite Nps-White Wolf?
EPA lists Yosemite Nps-White Wolf as owned by the federal government. 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. 22 of the 117 active systems in Tuolumne County (19%) are also owned by the federal government.
Does Yosemite Nps-White Wolf 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 Yosemite Nps-White Wolf. For the latest compliance status, check EPA ECHO for current compliance history.
Yosemite Nps-White Wolf: frequently asked questions
Who runs Yosemite Nps-White Wolf?
Yosemite Nps-White Wolf (PWSID CA5510504) is a transient non-community water system owned by the federal government. It is regulated by the CA state drinking water program.
How many people does Yosemite Nps-White Wolf serve?
Yosemite Nps-White Wolf reports serving 300 people through 5 service connections in Tuolumne County, California.
Where does Yosemite Nps-White Wolf 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 Yosemite Nps-White Wolf have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Yosemite Nps-White Wolf'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 Yosemite Nps-White Wolf's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Yosemite Nps-White Wolf 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 Tuolumne County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tud - Upper Basin Water System | Tuolumne | 13,280 | Community | Surface water |
| Tud - Sonora/Jamestown Water System | Tuolumne | 11,054 | Community | Surface water |
| Tud - Columbia Water System | Tuolumne | 5,463 | Community | Surface water |
| Peppery Bar and Grill, the | Tuolumne | 4,500 | Transient non-community | Groundwater |
| Cdcr - Sierra Conservation Center | Tuolumne | 3,571 | Community | Surface water |
| Groveland Community Serv Dist | Tuolumne | 3,400 | Community | Surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Yosemite Nps-White Wolf, PWSID CA5510504, California”, https://aquacensus.com/water-systems/california/yosemite-nps-white-wolf-ca5510504 (data as of October 1, 2026).