Public water system · CA2800058
ActiveQuintessa Winery Water System
At a glance
Quintessa Winery Water System (PWSID CA2800058) is an active transient non-community water system in Napa County, California. It reports serving 33 people through 1 service connection. 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
33
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Quintessa Winery Water System compare with other water systems in Napa County?
By EPA's size categories, Quintessa Winery Water System is a very small system (500 people or fewer). Napa County has 188 active public water systems. Its population served is well below the county average of 861 people per system, and accounts for less than 0.1% of the 161,950 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 Quintessa Winery Water System is well 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 Quintessa Winery Water System?
EPA lists Quintessa Winery 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. 168 of the 188 active systems in Napa County (89%) are also privately owned.
Does Quintessa Winery 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 Quintessa Winery Water System. For the latest compliance status, check EPA ECHO for current compliance history.
Quintessa Winery Water System: frequently asked questions
Who runs Quintessa Winery Water System?
Quintessa Winery Water System (PWSID CA2800058) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Quintessa Winery Water System serve?
Quintessa Winery Water System reports serving 33 people through 1 service connection in Napa County, California.
Where does Quintessa Winery 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 Quintessa Winery Water System have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Quintessa Winery 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 Quintessa Winery Water System's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Quintessa Winery 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 Napa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Napa, City of | Napa | 84,804 | Community | Surface water |
| American Canyon, City of | Napa | 21,437 | Community | Surface water |
| Phelps Vineyards | Napa | 19,412 | Non-transient non-community | Groundwater |
| Calistoga, City of | Napa | 5,610 | Community | Surface water |
| St. Helena, City of | Napa | 5,386 | Community | Surface water |
| Town of Yountville | Napa | 2,787 | 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, “Quintessa Winery Water System, PWSID CA2800058, California”, https://aquacensus.com/water-systems/california/quintessa-winery-water-system-ca2800058 (data as of October 1, 2026).