Public water system · CA1910194
ActiveRowland Water District
At a glance
Rowland Water District (PWSID CA1910194) is an active community water system in Los Angeles County, California. It reports serving 56,100 people through 13,546 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
56,100
Service connections
13,546
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Rowland Water District compare with other water systems in Los Angeles County?
By EPA's size categories, Rowland Water District is a large system (10,001 to 100,000 people). Los Angeles County has 275 active public water systems. Its population served is about 53% above the county average of 36,762 people per system, and accounts for 0.6% of the 10,109,668 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 Rowland Water District is about 8.4 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 Rowland Water District?
EPA lists Rowland Water 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. 100 of the 275 active systems in Los Angeles County (36%) are also owned by a local government.
Does Rowland Water 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 Rowland Water District. For the latest compliance status, check EPA ECHO for current compliance history.
Rowland Water District: frequently asked questions
Who runs Rowland Water District?
Rowland Water District (PWSID CA1910194) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Rowland Water District serve?
Rowland Water District reports serving 56,100 people through 13,546 service connections in Los Angeles County, California.
Where does Rowland Water 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 Rowland Water District have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Rowland Water 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 Rowland Water District's water quality report?
As a community water system, Rowland Water 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 Los Angeles County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Los Angeles-City, Dept. of Water & Power | Los Angeles | 3,875,566 | Community | Surface water |
| Long Beach Utilities Department | Los Angeles | 466,772 | Community | Purchased surface water |
| Santa Clarita Valley Water Agency | Los Angeles | 294,090 | Community | Surface water |
| Gswc - Southwest | Los Angeles | 277,740 | Community | Purchased surface water |
| San Gabriel Valley Water Co.-El Monte | Los Angeles | 248,000 | Community | Groundwater |
| Los Angeles Cwwd 40 Reg 4 & 34 Lancaster | Los Angeles | 208,129 | 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, “Rowland Water District, PWSID CA1910194, California”, https://aquacensus.com/water-systems/california/rowland-water-district-ca1910194 (data as of October 1, 2026).