Public water system · CA4400667
ActiveEmerald City Mutual Water Co
At a glance
Emerald City Mutual Water Co (PWSID CA4400667) is an active community water system in Santa Cruz County, California. It reports serving 26 people through 11 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
26
Service connections
11
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Emerald City Mutual Water Co compare with other water systems in Santa Cruz County?
By EPA's size categories, Emerald City 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 Emerald City 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. 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 Emerald City Mutual Water Co?
EPA lists Emerald City 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 Emerald City Mutual Water Co 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 Emerald City Mutual Water Co. For the latest compliance status, check EPA ECHO for current compliance history.
Emerald City Mutual Water Co: frequently asked questions
Who runs Emerald City Mutual Water Co?
Emerald City Mutual Water Co (PWSID CA4400667) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Emerald City Mutual Water Co serve?
Emerald City Mutual Water Co reports serving 26 people through 11 service connections in Santa Cruz County, California.
Where does Emerald City Mutual Water Co 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 Emerald City Mutual Water Co have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Emerald City 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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Emerald City Mutual Water Co's water quality report?
As a community water system, Emerald City 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, “Emerald City Mutual Water Co, PWSID CA4400667, California”, https://aquacensus.com/water-systems/california/emerald-city-mutual-water-co-ca4400667 (data as of October 1, 2026).