Public water system · CA4910306
ActiveCsp-Armstrong Redwoods State Reserve
At a glance
Csp-Armstrong Redwoods State Reserve (PWSID CA4910306) is an active transient non-community water system in Sonoma County, California. It reports serving 611 people through 11 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
611
Service connections
11
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Csp-Armstrong Redwoods State Reserve compare with other water systems in Sonoma County?
By EPA's size categories, Csp-Armstrong Redwoods State Reserve is a small system (501 to 3,300 people). Sonoma County has 441 active public water systems. Its population served is about 44% below the county average of 1,092 people per system, and accounts for 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 Csp-Armstrong Redwoods State Reserve is about 4.2 times 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 Csp-Armstrong Redwoods State Reserve?
EPA lists Csp-Armstrong Redwoods State Reserve 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. 10 of the 441 active systems in Sonoma County (2.3%) are also owned by a state government.
Does Csp-Armstrong Redwoods State Reserve 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 Csp-Armstrong Redwoods State Reserve. For the latest compliance status, check EPA ECHO for current compliance history.
Csp-Armstrong Redwoods State Reserve: frequently asked questions
Who runs Csp-Armstrong Redwoods State Reserve?
Csp-Armstrong Redwoods State Reserve (PWSID CA4910306) is a transient non-community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Csp-Armstrong Redwoods State Reserve serve?
Csp-Armstrong Redwoods State Reserve reports serving 611 people through 11 service connections in Sonoma County, California.
Where does Csp-Armstrong Redwoods State Reserve 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 Csp-Armstrong Redwoods State Reserve have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Csp-Armstrong Redwoods State Reserve'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 Csp-Armstrong Redwoods State Reserve's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Csp-Armstrong Redwoods State Reserve 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, “Csp-Armstrong Redwoods State Reserve, PWSID CA4910306, California”, https://aquacensus.com/water-systems/california/csp-armstrong-redwoods-state-reserve-ca4910306 (data as of October 1, 2026).