Public Water System

TARRYTOWN WATER SUPPLY

PWSID NY5903461 · New York · 11,000 people served

Failing

TARRYTOWN WATER SUPPLY is an EPA-regulated public water system in New York (PWSID NY5903461). It serves an estimated 11,000 residents — a small city of customers — across 1 community across 1 ZIP code.

Over the past five years, TARRYTOWN WATER SUPPLY has recorded 12 EPA health-based violations. The grade of F summarizes this compliance pattern. Specific contaminants, dates, and rule citations are listed in the violation history below.

Service Area

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Centered on the averaged ZIP-code centroid of 1 ZIP served.

Population

11,000

Cities

ZIPs

Violations

EPA Health-Based Violations

Health-based Maximum Contaminant Level (MCL) violations on file for TARRYTOWN WATER SUPPLY over the past five years of EPA SDWIS reporting.

Haloacetic Acids (HAA5)disinfectant

EPA Code 2456 · Maximum Contaminant Level Exceedance

violations

EPA Limit

0.06 mg/L

Last Reading

.062 MG/L

First Reported

Oct 2021

Most Recent

Jan 2022

What this violation means

Haloacetic Acids (HAA5) are the second major group of disinfection byproducts after TTHMs. They form by the same mechanism — chlorine reacting with organic matter — and pose similar long-term cancer risks. Utilities are required to test quarterly at distribution-system locations to track HAA5 levels.

Recommended precautions

→Activated carbon filtration removes most HAA5.
→Reverse osmosis is highly effective.
→Unlike TTHMs, HAA5 do not significantly off-gas. Use treatment rather than aeration.
→Long-term ingestion is the primary concern, not short-term skin contact.

Read the complete guide to Haloacetic Acids (HAA5)

Source: EPA Safe Drinking Water Information System (SDWIS). Health-based violations only. Older violations may have been resolved; check your utility's most recent Consumer Confidence Report for current status.

Cities Served by TARRYTOWN WATER SUPPLY

TARRYTOWN

ZIP Codes Served

10591

About this system

EPA records this system as PWSID NY5903461. Data reflects the most recent EPA SDWIS publication as of 2026-05-18. Public Water System Identifiers (PWSIDs) are assigned by the EPA's Safe Drinking Water Act program to track every regulated water utility in the United States. The first two letters typically indicate the state primacy agency. For real-time water quality information, contact TARRYTOWN WATER SUPPLY directly or review their annual Consumer Confidence Report (CCR).