Public water system · CA4901482
ActiveGambonini Family Ranch
At a glance
Gambonini Family Ranch (PWSID CA4901482) is an active transient non-community water system in Sonoma County, California. It reports serving 170 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
170
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Gambonini Family Ranch compare with other water systems in Sonoma County?
By EPA's size categories, Gambonini Family Ranch is a very small system (500 people or fewer). Sonoma County has 441 active public water systems. Its population served is well below the county average of 1,092 people per system, and accounts for less than 0.1% of the 481,435 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 Gambonini Family Ranch is about 18% 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 Gambonini Family Ranch?
EPA lists Gambonini Family Ranch 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. 371 of the 441 active systems in Sonoma County (84%) are also privately owned.
Does Gambonini Family Ranch 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 Gambonini Family Ranch. For the latest compliance status, check EPA ECHO for current compliance history.
Gambonini Family Ranch: frequently asked questions
Who runs Gambonini Family Ranch?
Gambonini Family Ranch (PWSID CA4901482) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Gambonini Family Ranch serve?
Gambonini Family Ranch reports serving 170 people through 2 service connections in Sonoma County, California.
Where does Gambonini Family Ranch 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 Gambonini Family Ranch have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Gambonini Family Ranch'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 Gambonini Family Ranch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Gambonini Family Ranch 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 Sonoma County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Santa Rosa, City of | Sonoma | 175,396 | Community | Groundwater |
| Petaluma, City of | Sonoma | 60,781 | Community | Groundwater |
| Rohnert Park, City of | Sonoma | 43,821 | Community | Groundwater |
| Windsor, Town of | Sonoma | 25,561 | Community | Groundwater |
| Valley of the Moon Water District | Sonoma | 23,107 | Community | Groundwater |
| Sonoma, City of | Sonoma | 11,725 | 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, “Gambonini Family Ranch, PWSID CA4901482, California”, https://aquacensus.com/water-systems/california/gambonini-family-ranch-ca4901482 (data as of October 1, 2026).