Public water system · CA5410016
ActiveCws - Visalia
At a glance
Cws - Visalia (PWSID CA5410016) is an active community water system in Tulare County, California. It reports serving 148,496 people through 47,895 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1992.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
148,496
Service connections
47,895
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cws - Visalia compare with other water systems in Tulare County?
By EPA's size categories, Cws - Visalia is a very large system (more than 100,000 people). Tulare County has 274 active public water systems, and Cws - Visalia is the largest of them by population served. Its population served is about 87 times the county average of 1,700 people per system, and accounts for 32% of the 465,710 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 Cws - Visalia is about 22 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. 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 Cws - Visalia?
EPA lists Cws - Visalia 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. 184 of the 274 active systems in Tulare County (67%) are also privately owned.
Does Cws - Visalia have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1992. The violations listed here began between September 1992 and October 1992. By type: 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 1992-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 2 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.
Cws - Visalia: frequently asked questions
Who runs Cws - Visalia?
Cws - Visalia (PWSID CA5410016) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Cws - Visalia serve?
Cws - Visalia reports serving 148,496 people through 47,895 service connections in Tulare County, California.
Where does Cws - Visalia 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 Cws - Visalia have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in October 1992. 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 Cws - Visalia'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 2 violations for this system; all are health-based, and the most recent began in October 1992. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Cws - Visalia's water quality report?
As a community water system, Cws - Visalia 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 Tulare County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tulare, City of | Tulare | 72,241 | Community | Groundwater |
| Porterville, City of | Tulare | 63,487 | Community | Groundwater |
| Dinuba, City of | Tulare | 27,281 | Community | Groundwater |
| Lindsay, City of | Tulare | 12,659 | Community | Surface water |
| Exeter, City of | Tulare | 11,169 | Community | Groundwater |
| Farmersville, City of | Tulare | 10,243 | Community | Groundwater |
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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, “Cws - Visalia, PWSID CA5410016, California”, https://aquacensus.com/water-systems/california/cws-visalia-ca5410016 (data as of October 1, 2026).