Public water system · CA3310051
ActiveMyoma Dunes Mutual Water Company
At a glance
Myoma Dunes Mutual Water Company (PWSID CA3310051) is an active community water system in Riverside County, California. It reports serving 9,445 people through 2,584 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in June 1993.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
9,445
Service connections
2,584
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Myoma Dunes Mutual Water Company compare with other water systems in Riverside County?
By EPA's size categories, Myoma Dunes Mutual Water Company is a medium system (3,301 to 10,000 people). Riverside County has 197 active public water systems. Its population served is about 35% below the county average of 14,435 people per system, and accounts for 0.3% of the 2,843,721 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 Myoma Dunes Mutual Water Company is about 41% above 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 Myoma Dunes Mutual Water Company?
EPA lists Myoma Dunes Mutual Water Company 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. 130 of the 197 active systems in Riverside County (66%) are also privately owned.
Does Myoma Dunes Mutual Water Company have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in June 1993. By type: 1 monitoring and reporting. The contaminant or rule involved is Lead and Copper Rule. EPA lists 1 as resolved. 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 |
|---|---|---|---|---|
| 1993-06-30 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
The one violation in EPA's records. 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.
Myoma Dunes Mutual Water Company: frequently asked questions
Who runs Myoma Dunes Mutual Water Company?
Myoma Dunes Mutual Water Company (PWSID CA3310051) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Myoma Dunes Mutual Water Company serve?
Myoma Dunes Mutual Water Company reports serving 9,445 people through 2,584 service connections in Riverside County, California.
Where does Myoma Dunes Mutual Water Company 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 Myoma Dunes Mutual Water Company have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in June 1993. 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 Myoma Dunes Mutual Water Company'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 one violation for this system; it is not health-based, and the most recent began in June 1993. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Myoma Dunes Mutual Water Company's water quality report?
As a community water system, Myoma Dunes Mutual Water Company 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 Riverside County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Eastern Municipal Wd | Riverside | 666,581 | Community | Purchased surface water |
| Riverside, City of | Riverside | 298,398 | Community | Groundwater under influence of surface water |
| Coachella Vwd: Cove Community | Riverside | 270,000 | Community | Groundwater |
| Elsinore Valley Mwd | Riverside | 169,455 | Community | Surface water |
| Corona, City of | Riverside | 168,575 | Community | Purchased surface water |
| Rancho California Water District | Riverside | 146,147 | 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, “Myoma Dunes Mutual Water Company, PWSID CA3310051, California”, https://aquacensus.com/water-systems/california/myoma-dunes-mutual-water-company-ca3310051 (data as of October 1, 2026).