Public water system · CA4300983
ActiveWillow Heights Mansion
At a glance
Willow Heights Mansion (PWSID CA4300983) is an active transient non-community water system in Santa Clara County, California. It reports serving 269 people through 2 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
269
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Willow Heights Mansion compare with other water systems in Santa Clara County?
By EPA's size categories, Willow Heights Mansion is a very small system (500 people or fewer). Santa Clara County has 121 active public water systems. Its population served is well below the county average of 17,334 people per system, and accounts for less than 0.1% of the 2,097,447 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 Willow Heights Mansion is about 87% above 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 Willow Heights Mansion?
EPA lists Willow Heights Mansion 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. 82 of the 121 active systems in Santa Clara County (68%) are also privately owned.
Does Willow Heights Mansion 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 Willow Heights Mansion. For the latest compliance status, check EPA ECHO for current compliance history.
Willow Heights Mansion: frequently asked questions
Who runs Willow Heights Mansion?
Willow Heights Mansion (PWSID CA4300983) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Willow Heights Mansion serve?
Willow Heights Mansion reports serving 269 people through 2 service connections in Santa Clara County, California.
Where does Willow Heights Mansion 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 Willow Heights Mansion have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Willow Heights Mansion'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 Willow Heights Mansion's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Willow Heights Mansion 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 Santa Clara County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| San Jose Water | Santa Clara | 1,039,920 | Community | Surface water |
| City of Sunnyvale | Santa Clara | 157,566 | Community | Purchased surface water |
| City of Santa Clara | Santa Clara | 130,746 | Community | Purchased surface water |
| Great Oaks Wc Inc. | Santa Clara | 110,088 | Community | Groundwater |
| City of San Jose - Evg/Edv/Coy | Santa Clara | 101,265 | Community | Purchased surface water |
| City of Milpitas | Santa Clara | 81,773 | Community | Purchased surface water |
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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, “Willow Heights Mansion, PWSID CA4300983, California”, https://aquacensus.com/water-systems/california/willow-heights-mansion-ca4300983 (data as of October 1, 2026).