Public water system · CA5610005

Active

Meiners Oaks Cwd

At a glance

Meiners Oaks Cwd (PWSID CA5610005) is an active community water system in Ventura County, California. It reports serving 4,200 people through 1,285 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; 3 are health-based, and the most recent began in April 2023.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

4,200

Service connections

1,285

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDCA5610005

System typeCommunity water system

Activity statusActive

Population served4,200

Service connections1,285

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyCA state drinking water program

City served—

StateCalifornia

ZIP—

CountyVentura County

How does Meiners Oaks Cwd compare with other water systems in Ventura County?

By EPA's size categories, Meiners Oaks Cwd is a medium system (3,301 to 10,000 people). Ventura County has 95 active public water systems. Its population served is about half of the county average of 9,293 people per system, and accounts for 0.5% of the 882,799 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 Meiners Oaks Cwd is about 37% 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 Meiners Oaks Cwd?

EPA lists Meiners Oaks Cwd 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. 29 of the 95 active systems in Ventura County (31%) are also owned by a local government.

Does Meiners Oaks Cwd have drinking water violations?

EPA's records list 11 violations for this system; 3 are health-based, and the most recent began in April 2023. The violations listed here began between June 1993 and April 2023. By type: 7 monitoring and reporting, 2 required treatment not met, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 11 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
2023-04-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2009-08-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
2007-10-01	Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31	Surface Water Treatment Rulecode 0200	No	Resolved
2007-08-01	Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26	Total coliform bacteria (TCR)code 3100	No	Resolved
2006-09-01	Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26	Total coliform bacteria (TCR)code 3100	No	Resolved
2005-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2004-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2004-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2000-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1998-07-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
1993-06-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved

All 11 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.

Meiners Oaks Cwd: frequently asked questions

Who runs Meiners Oaks Cwd?

Meiners Oaks Cwd (PWSID CA5610005) is a community water system owned by a local government. It is regulated by the CA state drinking water program.

How many people does Meiners Oaks Cwd serve?

Meiners Oaks Cwd reports serving 4,200 people through 1,285 service connections in Ventura County, California.

Where does Meiners Oaks Cwd 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 Meiners Oaks Cwd have any drinking water violations?

EPA's records list 11 violations for this system; 3 are health-based, and the most recent began in April 2023. 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 Meiners Oaks Cwd'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 11 violations for this system; 3 are health-based, and the most recent began in April 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.

Where can I find Meiners Oaks Cwd's water quality report?

As a community water system, Meiners Oaks Cwd 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 Ventura County

Water system	County	Population served	Type	Source
Oxnard Water Dept	Ventura	200,232	Community	Purchased surface water
Ventura Water Department	Ventura	113,500	Community	Surface water
Ventura Wwd No. 8 - Simi Valley	Ventura	94,738	Community	Purchased surface water
Cal American Water Co	Ventura	66,809	Community	Purchased surface water
City of Thousand Oaks Water Department	Ventura	53,157	Community	Purchased surface water
Camarillo Water Dept	Ventura	46,824	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, “Meiners Oaks Cwd, PWSID CA5610005, California”, https://aquacensus.com/water-systems/california/meiners-oaks-cwd-ca5610005 (data as of October 1, 2026).