Public water system · CA5602103

Active

Cypress Mutual Water Co Inc.

At a glance

Cypress Mutual Water Co Inc. (PWSID CA5602103) is an active community water system in Ventura County, California. It reports serving 224 people through 68 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in October 2019.

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

Population served

224

Service connections

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDCA5602103

System typeCommunity water system

Activity statusActive

Population served224

Service connections68

Primary water sourcePurchased surface water

Owner typePrivate

Primacy agencyCA state drinking water program

City served—

StateCalifornia

ZIP—

CountyVentura County

How does Cypress Mutual Water Co Inc. compare with other water systems in Ventura County?

By EPA's size categories, Cypress Mutual Water Co Inc. is a very small system (500 people or fewer). Ventura County has 95 active public water systems. Its population served is well below the county average of 9,293 people per system, and accounts for less than 0.1% 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 Cypress Mutual Water Co Inc. is well 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 Cypress Mutual Water Co Inc.?

EPA lists Cypress Mutual Water Co Inc. 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. 59 of the 95 active systems in Ventura County (62%) are also privately owned.

Does Cypress Mutual Water Co Inc. have drinking water violations?

EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in October 2019. The violations listed here began between October 1980 and October 2019. By type: 7 monitoring and reporting, 2 monitoring, 1 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 8 as resolved and 3 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.

Began	Violation	Contaminant or rule	Health-based	Status
2019-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2018-09-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2016-09-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2014-09-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2009-02-01	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	Total trihalomethanes (TTHM)code 2950	No	Resolved
2004-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2002-06-30	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1984-08-01	Public notice, recordkeeping or otherNotification, Public · code 06	Not reported	No	Archived
1981-10-01	Monitoring and reportingMonitoring, Regular · code 03	Gross alpha (excluding radon and uranium)code 4000	No	Archived
1980-10-30	Monitoring and reportingMonitoring, Regular · code 03	Gross alpha (excluding radon and uranium)code 4000	No	Archived

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.

Cypress Mutual Water Co Inc.: frequently asked questions

Who runs Cypress Mutual Water Co Inc.?

Cypress Mutual Water Co Inc. (PWSID CA5602103) is a community water system privately owned. It is regulated by the CA state drinking water program.

How many people does Cypress Mutual Water Co Inc. serve?

Cypress Mutual Water Co Inc. reports serving 224 people through 68 service connections in Ventura County, California.

Where does Cypress Mutual Water Co Inc. 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 Cypress Mutual Water Co Inc. have any drinking water violations?

EPA's records list 11 violations for this system; 1 is health-based, and the most recent began in October 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 Cypress Mutual Water Co Inc.'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; 1 is health-based, and the most recent began in October 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 Cypress Mutual Water Co Inc.'s water quality report?

As a community water system, Cypress Mutual Water Co Inc. 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, “Cypress Mutual Water Co Inc., PWSID CA5602103, California”, https://aquacensus.com/water-systems/california/cypress-mutual-water-co-inc-ca5602103 (data as of October 1, 2026).