Public water system · CA0707550
ActiveSunset Marina
At a glance
Sunset Marina (PWSID CA0707550) is an active transient non-community water system in Contra Costa County, California. It reports serving 30 people through 53 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
30
Service connections
53
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Sunset Marina compare with other water systems in Contra Costa County?
By EPA's size categories, Sunset Marina is a very small system (500 people or fewer). Contra Costa County has 84 active public water systems. Its population served is well below the county average of 6,726 people per system, and accounts for less than 0.1% of the 564,952 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 Sunset Marina is well below 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 Sunset Marina?
EPA lists Sunset Marina 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. 57 of the 84 active systems in Contra Costa County (68%) are also privately owned.
Does Sunset Marina 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 Sunset Marina. For the latest compliance status, check EPA ECHO for current compliance history.
Sunset Marina: frequently asked questions
Who runs Sunset Marina?
Sunset Marina (PWSID CA0707550) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Sunset Marina serve?
Sunset Marina reports serving 30 people through 53 service connections in Contra Costa County, California.
Where does Sunset Marina 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 Sunset Marina have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Sunset Marina'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 Sunset Marina's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Sunset Marina 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 Contra Costa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Contra Costa Water District | Contra Costa | 198,000 | Community | Surface water |
| City of Antioch | Contra Costa | 115,074 | Community | Surface water |
| Brentwood | Contra Costa | 64,513 | Community | Purchased surface water |
| City of Pittsburg | Contra Costa | 62,500 | Community | Purchased surface water |
| Diablo Water District | Contra Costa | 43,357 | Community | Purchased surface water |
| City of Martinez | Contra Costa | 30,997 | 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, “Sunset Marina, PWSID CA0707550, California”, https://aquacensus.com/water-systems/california/sunset-marina-ca0707550 (data as of October 1, 2026).