Public water system · NY5903441
ActiveMount Vernon Water Department
At a glance
Mount Vernon Water Department (PWSID NY5903441) is an active community water system in Westchester County, New York. It reports serving 73,893 people through 10,172 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; all are health-based, and the most recent began in August 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
73,893
Service connections
10,172
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Mount Vernon Water Department compare with other water systems in Westchester County?
By EPA's size categories, Mount Vernon Water Department is a large system (10,001 to 100,000 people). Westchester County has 273 active public water systems, and Mount Vernon Water Department is the 4th-largest of them by population served. Its population served is about 19 times the county average of 3,808 people per system, and accounts for 7.1% of the 1,039,556 people reported by systems filed under the county. Across New York, the 8,167 active systems average 2,374 people each. Nationally, the average active community water system reports serving 6,703 people, so Mount Vernon Water Department is about 11 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. New York has 2,281 active community water systems, 28% of the state's 8,167 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 399 New York systems (4.9%) list purchased surface water as their primary source.
Who owns and regulates Mount Vernon Water Department?
EPA lists Mount Vernon Water Department as owned by a local government. The NY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 77 of the 273 active systems in Westchester County (28%) are also owned by a local government.
Does Mount Vernon Water Department have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in August 2015. The violations listed here began between January 1995 and August 2015. By type: 1 contaminant level above the legal limit and 1 required treatment not met. The contaminants or rules involved are Total coliform bacteria (TCR) and Lead and Copper Rule. 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 |
|---|---|---|---|---|
| 2015-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-01-01 | Required treatment not metOCCT/SOWT Treatment Installation/Demonstration · code 58 | Lead and Copper Rulecode 5000 | 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.
Mount Vernon Water Department: frequently asked questions
Who runs Mount Vernon Water Department?
Mount Vernon Water Department (PWSID NY5903441) is a community water system owned by a local government. It is regulated by the NY state drinking water program.
How many people does Mount Vernon Water Department serve?
Mount Vernon Water Department reports serving 73,893 people through 10,172 service connections in Westchester County, New York.
Where does Mount Vernon Water Department 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 Mount Vernon Water Department have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in August 2015. 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 Mount Vernon Water Department'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 August 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Mount Vernon Water Department's water quality report?
As a community water system, Mount Vernon Water Department 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 Westchester County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Yonkers City | Westchester | 211,569 | Community | Purchased surface water |
| Veolia Water New York, Inc.. Rd-1 | Westchester | 146,732 | Community | Purchased surface water |
| Greenburgh Consolidated Wd #1 | Westchester | 86,624 | Community | Purchased surface water |
| Westchester Joint Water Works | Westchester | 59,629 | Community | Surface water |
| White Plains City | Westchester | 59,559 | Community | Purchased surface water |
| Veolia Water New York, Inc.. Rd-2 | Westchester | 57,301 | 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, “Mount Vernon Water Department, PWSID NY5903441, New York”, https://aquacensus.com/water-systems/new-york/mount-vernon-water-department-ny5903441 (data as of October 1, 2026).