Public water system · CA4901436
ActiveSebastopol Charter School
At a glance
Sebastopol Charter School (PWSID CA4901436) is an active non-transient non-community water system in Sonoma County, California. It reports serving 310 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
310
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Sebastopol Charter School compare with other water systems in Sonoma County?
By EPA's size categories, Sebastopol Charter School 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 non-transient non-community water system reports serving 430 people, so Sebastopol Charter School is about 28% 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 Sebastopol Charter School?
EPA lists Sebastopol Charter School 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 Sebastopol Charter School 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 Sebastopol Charter School. For the latest compliance status, check EPA ECHO for current compliance history.
Sebastopol Charter School: frequently asked questions
Who runs Sebastopol Charter School?
Sebastopol Charter School (PWSID CA4901436) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Sebastopol Charter School serve?
Sebastopol Charter School reports serving 310 people through 1 service connection in Sonoma County, California.
Where does Sebastopol Charter School 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 Sebastopol Charter School have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Sebastopol Charter School'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 Sebastopol Charter School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Sebastopol Charter School 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 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, “Sebastopol Charter School, PWSID CA4901436, California”, https://aquacensus.com/water-systems/california/sebastopol-charter-school-ca4901436 (data as of October 1, 2026).