Public water system · CA5500372
ActiveUnder Canvas-Yosemite
At a glance
Under Canvas-Yosemite (PWSID CA5500372) is an active non-transient non-community water system in Tuolumne County, California. It reports serving 226 people through 77 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
226
Service connections
77
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Under Canvas-Yosemite compare with other water systems in Tuolumne County?
By EPA's size categories, Under Canvas-Yosemite is a very small system (500 people or fewer). Tuolumne County has 117 active public water systems. Its population served is well below the county average of 706 people per system, and accounts for 0.3% 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 non-transient non-community water system reports serving 430 people, so Under Canvas-Yosemite is about half of that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. California has 1,466 active non-transient non-community water systems, 20% 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 Under Canvas-Yosemite?
EPA lists Under Canvas-Yosemite 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. 75 of the 117 active systems in Tuolumne County (64%) are also privately owned.
Does Under Canvas-Yosemite 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 Under Canvas-Yosemite. For the latest compliance status, check EPA ECHO for current compliance history.
Under Canvas-Yosemite: frequently asked questions
Who runs Under Canvas-Yosemite?
Under Canvas-Yosemite (PWSID CA5500372) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Under Canvas-Yosemite serve?
Under Canvas-Yosemite reports serving 226 people through 77 service connections in Tuolumne County, California.
Where does Under Canvas-Yosemite 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 Under Canvas-Yosemite have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Under Canvas-Yosemite'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 Under Canvas-Yosemite's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Under Canvas-Yosemite is a non-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, “Under Canvas-Yosemite, PWSID CA5500372, California”, https://aquacensus.com/water-systems/california/under-canvas-yosemite-ca5500372 (data as of October 1, 2026).