Public water system · CA2810302
ActiveCal Fire Sonoma-Lake-Napa Unit Hq
At a glance
Cal Fire Sonoma-Lake-Napa Unit Hq (PWSID CA2810302) is an active non-transient non-community water system in Napa County, California. It reports serving 65 people through 7 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list one violation for this system; it is not health-based, and the most recent began in March 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
65
Service connections
7
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Cal Fire Sonoma-Lake-Napa Unit Hq compare with other water systems in Napa County?
By EPA's size categories, Cal Fire Sonoma-Lake-Napa Unit Hq 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 non-transient non-community water system reports serving 430 people, so Cal Fire Sonoma-Lake-Napa Unit Hq is well below 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 Cal Fire Sonoma-Lake-Napa Unit Hq?
EPA lists Cal Fire Sonoma-Lake-Napa Unit Hq as owned by a state 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. 4 of the 188 active systems in Napa County (2.1%) are also owned by a state government.
Does Cal Fire Sonoma-Lake-Napa Unit Hq have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in March 2020. By type: 1 monitoring and reporting. The contaminant or rule involved is Arsenic. EPA lists 1 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2020-03-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
The one violation in EPA's records. Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Cal Fire Sonoma-Lake-Napa Unit Hq: frequently asked questions
Who runs Cal Fire Sonoma-Lake-Napa Unit Hq?
Cal Fire Sonoma-Lake-Napa Unit Hq (PWSID CA2810302) is a non-transient non-community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Cal Fire Sonoma-Lake-Napa Unit Hq serve?
Cal Fire Sonoma-Lake-Napa Unit Hq reports serving 65 people through 7 service connections in Napa County, California.
Where does Cal Fire Sonoma-Lake-Napa Unit Hq 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 Cal Fire Sonoma-Lake-Napa Unit Hq have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in March 2020. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Cal Fire Sonoma-Lake-Napa Unit Hq'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 records list one violation for this system; it is not health-based, and the most recent began in March 2020. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Cal Fire Sonoma-Lake-Napa Unit Hq's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cal Fire Sonoma-Lake-Napa Unit Hq 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 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, “Cal Fire Sonoma-Lake-Napa Unit Hq, PWSID CA2810302, California”, https://aquacensus.com/water-systems/california/cal-fire-sonoma-lake-napa-unit-hq-ca2810302 (data as of October 1, 2026).