Public water system · CA5610058
ActiveCrestview Mutual Water Co
At a glance
Crestview Mutual Water Co (PWSID CA5610058) is an active community water system in Ventura County, California. It reports serving 2,079 people through 630 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 3 violations for this system; none is health-based, and the most recent began in October 2010.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,079
Service connections
630
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Crestview Mutual Water Co compare with other water systems in Ventura County?
By EPA's size categories, Crestview Mutual Water Co is a small system (501 to 3,300 people). 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 0.2% 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 Crestview Mutual Water Co 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 Crestview Mutual Water Co?
EPA lists Crestview 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. 59 of the 95 active systems in Ventura County (62%) are also privately owned.
Does Crestview Mutual Water Co have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in October 2010. The violations listed here began between July 1997 and October 2010. By type: 3 monitoring and reporting. 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 |
|---|---|---|---|---|
| 2010-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-07-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | 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.
Crestview Mutual Water Co: frequently asked questions
Who runs Crestview Mutual Water Co?
Crestview Mutual Water Co (PWSID CA5610058) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Crestview Mutual Water Co serve?
Crestview Mutual Water Co reports serving 2,079 people through 630 service connections in Ventura County, California.
Where does Crestview Mutual Water Co 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 Crestview Mutual Water Co have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in October 2010. 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 Crestview 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; none is health-based, and the most recent began in October 2010. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Crestview Mutual Water Co's water quality report?
As a community water system, Crestview 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 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, “Crestview Mutual Water Co, PWSID CA5610058, California”, https://aquacensus.com/water-systems/california/crestview-mutual-water-co-ca5610058 (data as of October 1, 2026).