Public water system · CA1010024
ActiveCws - Selma
At a glance
Cws - Selma (PWSID CA1010024) is an active community water system in Fresno County, California. It reports serving 26,517 people through 6,501 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in September 1992.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
26,517
Service connections
6,501
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cws - Selma compare with other water systems in Fresno County?
By EPA's size categories, Cws - Selma is a large system (10,001 to 100,000 people). Fresno County has 328 active public water systems, and Cws - Selma is the 4th-largest of them by population served. Its population served is about 8.3 times the county average of 3,205 people per system, and accounts for 2.5% of the 1,051,276 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 - Selma is about 4 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 - Selma?
EPA lists Cws - Selma 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. 220 of the 328 active systems in Fresno County (67%) are also privately owned.
Does Cws - Selma have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in September 1992. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 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 |
|---|---|---|---|---|
| 1992-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
The one violation in EPA's records.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 - Selma: frequently asked questions
Who runs Cws - Selma?
Cws - Selma (PWSID CA1010024) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Cws - Selma serve?
Cws - Selma reports serving 26,517 people through 6,501 service connections in Fresno County, California.
Where does Cws - Selma 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 - Selma have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in September 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 - Selma'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 one violation for this system; it is health-based, and the most recent began in September 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 - Selma's water quality report?
As a community water system, Cws - Selma 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 Fresno County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Fresno | Fresno | 545,716 | Community | Surface water |
| City of Clovis | Fresno | 130,130 | Community | Surface water |
| California State University Fresno | Fresno | 41,000 | Community | Groundwater |
| City of Sanger | Fresno | 26,357 | Community | Groundwater |
| Reedley, City of | Fresno | 26,076 | Community | Groundwater |
| Bakman Water Company | Fresno | 17,393 | 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 - Selma, PWSID CA1010024, California”, https://aquacensus.com/water-systems/california/cws-selma-ca1010024 (data as of October 1, 2026).