Public water system · CA2310308
ActiveCsp-Mendocino Headlands-Sea Arch
At a glance
Csp-Mendocino Headlands-Sea Arch (PWSID CA2310308) is an active transient non-community water system in Mendocino County, California. It reports serving 500 people through 1 service connection. 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
500
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Csp-Mendocino Headlands-Sea Arch compare with other water systems in Mendocino County?
By EPA's size categories, Csp-Mendocino Headlands-Sea Arch is a very small system (500 people or fewer). Mendocino County has 144 active public water systems. Its population served is about 13% below the county average of 576 people per system, and accounts for 0.6% of the 82,868 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-Mendocino Headlands-Sea Arch is about 3.5 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-Mendocino Headlands-Sea Arch?
EPA lists Csp-Mendocino Headlands-Sea Arch 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. 16 of the 144 active systems in Mendocino County (11%) are also owned by a state government.
Does Csp-Mendocino Headlands-Sea Arch 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-Mendocino Headlands-Sea Arch. For the latest compliance status, check EPA ECHO for current compliance history.
Csp-Mendocino Headlands-Sea Arch: frequently asked questions
Who runs Csp-Mendocino Headlands-Sea Arch?
Csp-Mendocino Headlands-Sea Arch (PWSID CA2310308) 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-Mendocino Headlands-Sea Arch serve?
Csp-Mendocino Headlands-Sea Arch reports serving 500 people through 1 service connection in Mendocino County, California.
Where does Csp-Mendocino Headlands-Sea Arch 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-Mendocino Headlands-Sea Arch have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Csp-Mendocino Headlands-Sea Arch'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-Mendocino Headlands-Sea Arch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Csp-Mendocino Headlands-Sea Arch 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 Mendocino County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ukiah, City of | Mendocino | 16,607 | Community | Surface water |
| Fort Bragg, City of | Mendocino | 6,919 | Community | Surface water |
| Willits, City of | Mendocino | 6,175 | Community | Surface water |
| Millview County Water District | Mendocino | 5,500 | Community | Surface water |
| Redwood Valley County Water District | Mendocino | 5,200 | Community | Surface water |
| Willow County Water District | Mendocino | 3,797 | 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, “Csp-Mendocino Headlands-Sea Arch, PWSID CA2310308, California”, https://aquacensus.com/water-systems/california/csp-mendocino-headlands-sea-arch-ca2310308 (data as of October 1, 2026).