Public water system · CA0110009
ActiveDublin San Ramon Services District
At a glance
Dublin San Ramon Services District (PWSID CA0110009) is an active community water system in Alameda County, California. It reports serving 98,776 people through 25,458 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
98,776
Service connections
25,458
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Dublin San Ramon Services District compare with other water systems in Alameda County?
By EPA's size categories, Dublin San Ramon Services District is a large system (10,001 to 100,000 people). Alameda County has 27 active public water systems, and Dublin San Ramon Services District is the 4th-largest of them by population served. Its population served is about 19% above the county average of 83,320 people per system, and accounts for 4.4% of the 2,249,634 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 Dublin San Ramon Services District is about 15 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 Dublin San Ramon Services District?
EPA lists Dublin San Ramon Services District 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. 15 of the 27 active systems in Alameda County (56%) are also owned by a local government.
Does Dublin San Ramon Services District 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 Dublin San Ramon Services District. For the latest compliance status, check EPA ECHO for current compliance history.
Dublin San Ramon Services District: frequently asked questions
Who runs Dublin San Ramon Services District?
Dublin San Ramon Services District (PWSID CA0110009) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Dublin San Ramon Services District serve?
Dublin San Ramon Services District reports serving 98,776 people through 25,458 service connections in Alameda County, California.
Where does Dublin San Ramon Services District 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 Dublin San Ramon Services District have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Dublin San Ramon Services District'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 Dublin San Ramon Services District's water quality report?
As a community water system, Dublin San Ramon Services District 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 Alameda County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| East Bay MUD | Alameda | 1,442,800 | Community | Surface water |
| Alameda County Water District | Alameda | 344,000 | Community | Surface water |
| City of Hayward | Alameda | 162,954 | Community | Purchased surface water |
| City of Pleasanton | Alameda | 76,689 | Community | Purchased surface water |
| California Water Service - Livermore | Alameda | 60,414 | Community | Purchased surface water |
| City of Livermore | Alameda | 38,892 | 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, “Dublin San Ramon Services District, PWSID CA0110009, California”, https://aquacensus.com/water-systems/california/dublin-san-ramon-services-district-ca0110009 (data as of October 1, 2026).