Public water system · CA4400599
ActiveSunset Beach Mutual Water Co
At a glance
Sunset Beach Mutual Water Co (PWSID CA4400599) is an active community water system in Santa Cruz County, California. It reports serving 182 people through 65 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
182
Service connections
65
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Sunset Beach Mutual Water Co compare with other water systems in Santa Cruz County?
By EPA's size categories, Sunset Beach Mutual Water Co is a very small system (500 people or fewer). Santa Cruz County has 96 active public water systems. Its population served is well below the county average of 2,856 people per system, and accounts for less than 0.1% of the 274,204 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so Sunset Beach Mutual Water Co is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active community water systems, 40% of the state's 7,479 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 506 California systems (6.8%) list purchased surface water as their primary source.
Who owns and regulates Sunset Beach Mutual Water Co?
EPA lists Sunset Beach Mutual Water Co 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. 76 of the 96 active systems in Santa Cruz County (79%) are also privately owned.
Does Sunset Beach Mutual Water Co have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2017. The violations listed here began between October 1980 and October 2017. By type: 4 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 4 as archived and 2 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. 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 |
|---|---|---|---|---|
| 2017-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1984-09-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1984-06-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1981-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1980-10-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 6 violations in EPA's records, newest first.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.
Sunset Beach Mutual Water Co: frequently asked questions
Who runs Sunset Beach Mutual Water Co?
Sunset Beach Mutual Water Co (PWSID CA4400599) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Sunset Beach Mutual Water Co serve?
Sunset Beach Mutual Water Co reports serving 182 people through 65 service connections in Santa Cruz County, California.
Where does Sunset Beach Mutual Water Co get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Sunset Beach Mutual Water Co have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2017. 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 Sunset Beach Mutual Water Co'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 6 violations for this system; none is health-based, and the most recent began in October 2017. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Sunset Beach Mutual Water Co's water quality report?
As a community water system, Sunset Beach Mutual Water Co must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Santa Cruz County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Santa Cruz Water Department | Santa Cruz | 94,626 | Community | Surface water |
| Watsonville, City of | Santa Cruz | 65,231 | Community | Surface water |
| Soquel Creek Water District | Santa Cruz | 40,809 | Community | Purchased surface water |
| San Lorenzo Valley Water Dist | Santa Cruz | 21,145 | Community | Surface water |
| Cabrillo College | Santa Cruz | 12,000 | Non-transient non-community | Groundwater |
| Scotts Valley Water District | Santa Cruz | 11,197 | 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, “Sunset Beach Mutual Water Co, PWSID CA4400599, California”, https://aquacensus.com/water-systems/california/sunset-beach-mutual-water-co-ca4400599 (data as of October 1, 2026).