Public water system · NY5903461

Active

Tarrytown Water Supply

At a glance

Tarrytown Water Supply (PWSID NY5903461) is an active community water system in Westchester County, New York. It reports serving 11,000 people through 2,500 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

11,000

Service connections

2,500

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDNY5903461

System typeCommunity water system

Activity statusActive

Population served11,000

Service connections2,500

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyNY state drinking water program

City servedTarrytown (V)

StateNew York

ZIP—

CountyWestchester County

How does Tarrytown Water Supply compare with other water systems in Westchester County?

By EPA's size categories, Tarrytown Water Supply is a large system (10,001 to 100,000 people). Westchester County has 273 active public water systems. Its population served is about 189% above the county average of 3,808 people per system, and accounts for 1.1% 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 Tarrytown Water Supply is about 64% 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. 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 Tarrytown Water Supply?

EPA lists Tarrytown Water Supply 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 Tarrytown Water Supply have drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2024. The violations listed here began between January 2007 and October 2024. By type: 6 monitoring and reporting, 3 contaminant level above the legal limit, 2 monitoring and 1 reporting. The contaminant or rule involved most often is Haloacetic acids (HAA5) (3 of them). EPA lists 12 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
2024-10-17	ReportingLSL Reporting · code 4G	Lead and Copper Rule Revisionscode 5200	No	Resolved
2022-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2021-11-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2021-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2021-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2016-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2015-12-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2015-01-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2013-08-01	Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26	Total coliform bacteria (TCR)code 3100	No	Resolved
2007-01-01	Monitoring and reportingMonitoring, Regular · code 03	Chromiumcode 1020	No	Resolved
2007-01-01	Monitoring and reportingMonitoring, Regular · code 03	Cadmiumcode 1015	No	Resolved
2007-01-01	Monitoring and reportingMonitoring, Regular · code 03	Thalliumcode 1085	No	Resolved

The 12 most recent 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.

Tarrytown Water Supply: frequently asked questions

Who runs Tarrytown Water Supply?

Tarrytown Water Supply (PWSID NY5903461) is a community water system owned by a local government. It is regulated by the NY state drinking water program.

How many people does Tarrytown Water Supply serve?

Tarrytown Water Supply reports serving 11,000 people through 2,500 service connections in Westchester County, New York.

Where does Tarrytown Water Supply 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 Tarrytown Water Supply have any drinking water violations?

Of the 12 most recent violations in EPA's records, 3 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 Tarrytown Water Supply'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. Of the 12 most recent violations in EPA's records, 3 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 NY state drinking water program.

Where can I find Tarrytown Water Supply's water quality report?

As a community water system, Tarrytown Water Supply 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
Mount Vernon Water Department	Westchester	73,893	Community	Purchased surface water
Westchester Joint Water Works	Westchester	59,629	Community	Surface water
White Plains City	Westchester	59,559	Community	Purchased surface water

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, “Tarrytown Water Supply, PWSID NY5903461, New York”, https://aquacensus.com/water-systems/new-york/tarrytown-water-supply-ny5903461 (data as of October 1, 2026).