Public water system · CA2410010
ActiveWinton Water & Sanitary Dist
At a glance
Winton Water & Sanitary Dist (PWSID CA2410010) is an active community water system in Merced County, California. It reports serving 9,745 people through 2,831 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 5 are health-based, and the most recent began in October 2024.
This page covers its drinking water system only; sewer and wastewater service are not part of EPA's drinking water records.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
9,745
Service connections
2,831
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Winton Water & Sanitary Dist compare with other water systems in Merced County?
By EPA's size categories, Winton Water & Sanitary Dist is a medium system (3,301 to 10,000 people). Merced County has 120 active public water systems, and Winton Water & Sanitary Dist is the 5th-largest of them by population served. Its population served is about 4.4 times the county average of 2,228 people per system, and accounts for 3.6% of the 267,324 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 Winton Water & Sanitary Dist is about 45% above 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 Winton Water & Sanitary Dist?
EPA lists Winton Water & Sanitary Dist 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. 30 of the 120 active systems in Merced County (25%) are also owned by a local government.
Does Winton Water & Sanitary Dist have drinking water violations?
EPA's records list 9 violations for this system; 5 are health-based, and the most recent began in October 2024. The violations listed here began between June 1989 and October 2024. By type: 4 contaminant level above the legal limit, 2 monitoring and reporting, 1 required treatment not met, 1 reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 6 as resolved, 2 as unaddressed and 1 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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 |
|---|---|---|---|---|
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Unaddressed |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2001-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1996-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1989-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | 1,2-Dibromo-3-chloropropane (DBCP)code 2931 | Yes | Resolved |
| 1989-06-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
All 9 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.
Winton Water & Sanitary Dist: frequently asked questions
Who runs Winton Water & Sanitary Dist?
Winton Water & Sanitary Dist (PWSID CA2410010) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Winton Water & Sanitary Dist serve?
Winton Water & Sanitary Dist reports serving 9,745 people through 2,831 service connections in Merced County, California.
Where does Winton Water & Sanitary Dist 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 Winton Water & Sanitary Dist have any drinking water violations?
EPA's records list 9 violations for this system; 5 are health-based, and the most recent began in October 2024. 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 Winton Water & Sanitary Dist'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 9 violations for this system; 5 are health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Winton Water & Sanitary Dist's water quality report?
As a community water system, Winton Water & Sanitary Dist 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 Merced County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Merced | Merced | 93,692 | Community | Groundwater |
| City of Los Banos | Merced | 47,419 | Community | Groundwater |
| City of Atwater | Merced | 29,479 | Community | Groundwater |
| City of Livingston | Merced | 14,894 | Community | Groundwater |
| Delhi Cwd | Merced | 7,784 | Community | Groundwater |
| City of Dos Palos | Merced | 7,452 | Community | Surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Winton Water & Sanitary Dist, PWSID CA2410010, California”, https://aquacensus.com/water-systems/california/winton-water-sanitary-dist-ca2410010 (data as of October 1, 2026).