Public water system · CA3310009
ActiveEastern Municipal Wd
At a glance
Eastern Municipal Wd (PWSID CA3310009) is an active community water system in Riverside County, California. It reports serving 666,581 people through 175,318 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in May 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
666,581
Service connections
175,318
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Eastern Municipal Wd compare with other water systems in Riverside County?
By EPA's size categories, Eastern Municipal Wd is a very large system (more than 100,000 people). Riverside County has 197 active public water systems, and Eastern Municipal Wd is the largest of them by population served. Its population served is about 46 times the county average of 14,435 people per system, and accounts for 23% 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 Eastern Municipal Wd is about 99 times 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 Eastern Municipal Wd?
EPA lists Eastern Municipal Wd as owned by a local 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. 50 of the 197 active systems in Riverside County (25%) are also owned by a local government.
Does Eastern Municipal Wd have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in May 2014. The violations listed here began between July 2010 and May 2014. By type: 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Total coliform bacteria (TCR), Surface Water Treatment Rule and Nitrate. EPA lists 3 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 |
|---|---|---|---|---|
| 2014-05-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-09-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2010-07-01 | Public notice, recordkeeping or otherNotification, State · code 05 | Nitratecode 1040 | No | Resolved |
All 3 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.
Eastern Municipal Wd: frequently asked questions
Who runs Eastern Municipal Wd?
Eastern Municipal Wd (PWSID CA3310009) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Eastern Municipal Wd serve?
Eastern Municipal Wd reports serving 666,581 people through 175,318 service connections in Riverside County, California.
Where does Eastern Municipal Wd 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 Eastern Municipal Wd have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in May 2014. 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 Eastern Municipal Wd'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 3 violations for this system; none is health-based, and the most recent began in May 2014. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Eastern Municipal Wd's water quality report?
As a community water system, Eastern Municipal Wd 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 |
|---|---|---|---|---|
| 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 |
| Jurupa Community Sd | Riverside | 135,093 | 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, “Eastern Municipal Wd, PWSID CA3310009, California”, https://aquacensus.com/water-systems/california/eastern-municipal-wd-ca3310009 (data as of October 1, 2026).