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Public water system record

Tarrytown Water Supply

Serves Tarrytown, Westchester County, NY · 11,000 people served

Federal records show 3 health-based violations and 2 monitoring/reporting issues for Tarrytown Water Supply in the last ten years. The most serious issue in this window was a resolved Haloacetic Acids (HAA5) violation.

  • NY5903461
  • TARRYTOWN
  • NY
  • 11,000 served

System profile

Source water Purchased surface water
ZIP 10591
EPA system ID NY5903461

Verify this system on EPA ECHO →

Health-based violations, last 10 years
3
Resolved
3
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
2

Key facts

  • Tarrytown Water Supply buys its water from New York City System.
  • Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.06465 mg/L, federal limit 0.06 mg/L (1.1 times the limit), 2021.
  • Record on file since 2003, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 176 lead and 289 unknown out of 2,338 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
 220 Jan 1, 2022 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.06205 mg/L, federal limit 0.06 mg/L (at or just above the limit)
 220 Oct 1, 2021 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.06465 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Oct 1, 2021 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Resolved
Revised Total Coliform Rule
Monitoring violation
 Nov 1, 2021 Resolved

Full record since 2003

EPA's records for Tarrytown Water Supply go back to 2003. Before October 19, 2016 they list no health-based violations and 21 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 0 17
2010 to October 18, 2016 0 4
2020s 3 2

What the violations mean

Haloacetic Acids (HAA5)

3 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Where the water comes from

Tarrytown Water Supply buys its water from New York City System. It lists no wells or intakes of its own.

Buys water from

Annual water quality report

Tarrytown Water Supply must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by New York.

Certified drinking water labs by state EPA guidance for private wells