Public water system · CA3010071
ActiveJoint Regional Water Supply System
At a glance
Joint Regional Water Supply System (PWSID CA3010071) is an active community water system in Orange County, California. It reports serving 3,947 people through 44 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
3,947
Service connections
44
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Joint Regional Water Supply System compare with other water systems in Orange County?
By EPA's size categories, Joint Regional Water Supply System is a medium system (3,301 to 10,000 people). Orange County has 46 active public water systems. Its population served is well below the county average of 69,606 people per system, and accounts for 0.1% of the 3,201,893 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 Joint Regional Water Supply System is about 41% 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 Joint Regional Water Supply System?
EPA lists Joint Regional Water Supply System 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. 34 of the 46 active systems in Orange County (74%) are also owned by a local government.
Does Joint Regional Water Supply System 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 Joint Regional Water Supply System. For the latest compliance status, check EPA ECHO for current compliance history.
Joint Regional Water Supply System: frequently asked questions
Who runs Joint Regional Water Supply System?
Joint Regional Water Supply System (PWSID CA3010071) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Joint Regional Water Supply System serve?
Joint Regional Water Supply System reports serving 3,947 people through 44 service connections in Orange County, California.
Where does Joint Regional Water Supply System 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 Joint Regional Water Supply System have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Joint Regional Water Supply System'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 Joint Regional Water Supply System's water quality report?
As a community water system, Joint Regional Water Supply System 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 Orange County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Irvine Ranch Water District | Orange | 444,800 | Community | Surface water |
| City of Anaheim | Orange | 348,593 | Community | Surface water |
| City of Santa Ana | Orange | 310,539 | Community | Purchased surface water |
| City of Huntington Beach | Orange | 201,000 | Community | Purchased surface water |
| City of Garden Grove | Orange | 174,226 | Community | Purchased surface water |
| Moulton Niguel Water District | Orange | 170,236 | 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, “Joint Regional Water Supply System, PWSID CA3010071, California”, https://aquacensus.com/water-systems/california/joint-regional-water-supply-system-ca3010071 (data as of October 1, 2026).