Public water system · CA1910160
ActiveTract 349 Mutual Water Co.
At a glance
Tract 349 Mutual Water Co. (PWSID CA1910160) is an active community water system in Los Angeles County, California. It reports serving 8,700 people through 949 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in May 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
8,700
Service connections
949
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Tract 349 Mutual Water Co. compare with other water systems in Los Angeles County?
By EPA's size categories, Tract 349 Mutual Water Co. is a medium system (3,301 to 10,000 people). Los Angeles County has 275 active public water systems. Its population served is well below the county average of 36,762 people per system, and accounts for less than 0.1% 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 Tract 349 Mutual Water Co. is about 30% 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 Tract 349 Mutual Water Co.?
EPA lists Tract 349 Mutual Water Co. 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. 150 of the 275 active systems in Los Angeles County (55%) are also privately owned.
Does Tract 349 Mutual Water Co. have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in May 2019. The violations listed here began between April 1996 and May 2019. By type: 1 public notice, recordkeeping or other, 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). 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 |
|---|---|---|---|---|
| 2019-05-01 | Public notice, recordkeeping or otherNotification, State · code 05 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2019-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 1996-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
Tract 349 Mutual Water Co.: frequently asked questions
Who runs Tract 349 Mutual Water Co.?
Tract 349 Mutual Water Co. (PWSID CA1910160) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Tract 349 Mutual Water Co. serve?
Tract 349 Mutual Water Co. reports serving 8,700 people through 949 service connections in Los Angeles County, California.
Where does Tract 349 Mutual Water Co. 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 Tract 349 Mutual Water Co. have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in May 2019. 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 Tract 349 Mutual Water Co.'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; 1 is health-based, and the most recent began in May 2019. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Tract 349 Mutual Water Co.'s water quality report?
As a community water system, Tract 349 Mutual Water Co. 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, “Tract 349 Mutual Water Co., PWSID CA1910160, California”, https://aquacensus.com/water-systems/california/tract-349-mutual-water-co-ca1910160 (data as of October 1, 2026).