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Public water system record

Kensico Water District

Serves an area of Westchester County, NY that includes Thornwood, Hawthorne and Valhalla · 17,917 people served

Federal records show 6 health-based violations and no monitoring/reporting issues for Kensico Water District in the last ten years. The most serious issue in this window was a resolved Haloacetic Acids (HAA5) violation.

  • NY5930082
  • VALHALLA
  • NY
  • 17,917 served

System profile

Source water Purchased surface water
ZIP 10595
EPA system ID NY5930082

Verify this system on EPA ECHO →

Health-based violations, last 10 years
6
Resolved
6
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • Kensico Water District buys its water from New York City System.
  • Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.071 mg/L, federal limit 0.06 mg/L (1.2 times the limit), 2021.
  • Most recent formal enforcement: compliance order (no penalty) by EPA, July 2022.
  • Record on file since 2005, with 7 health-based violations before October 19, 2016.
  • Lead pipe inventory: 2 lead and 629 unknown out of 5,236 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 0.067 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Jan 1, 2022 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.071 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 220 Oct 1, 2021 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 66.55 µg/L, federal limit 60 µg/L (1.1 times the limit)
 220 Apr 1, 2019 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 70.43 µg/L, federal limit 60 µg/L (1.2 times the limit)
 220 Jan 1, 2019 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 68.47 µg/L, federal limit 60 µg/L (1.1 times the limit)
 220 Oct 1, 2018 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 61.63 µg/L, federal limit 60 µg/L (at or just above the limit)
 220 Jul 1, 2018 Resolved No

Full record since 2005

EPA's records for Kensico Water District go back to 2005. Before October 19, 2016 they list 7 health-based violations (7 resolved) and no monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 1 0
2010 to October 18, 2016 6 0
October 19, 2016 to 2019 4 0
2020s 2 0

Most recent health-based violation before October 19, 2016: Total Coliform, began August 2012, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 Aug 1, 2012 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 67.28 µg/L, federal limit 60 µg/L (1.1 times the limit)
 Jan 1, 2012 Resolved
Total Coliform
Contaminant limit exceeded
 Nov 1, 2011 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 64.34 µg/L, federal limit 60 µg/L (1.1 times the limit)
 Oct 1, 2011 Resolved
Total Coliform
Contaminant limit exceeded
 Jun 1, 2011 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 63.84 µg/L, federal limit 60 µg/L (1.1 times the limit)
 Jul 1, 2010 Resolved
Total Coliform
Contaminant limit exceeded
 Sep 1, 2005 Resolved

Enforcement actions

EPA took 2 formal enforcement actions against Kensico Water District between 2019 and 2022. The most recent was a compliance order (no penalty) in July 2022.

Date By Action Violations covered
Jul 5, 2022 EPA Compliance order (no penalty) 2 violations (2 health-based): Haloacetic Acids (HAA5)
Jun 4, 2019 EPA Compliance order (no penalty) 3 violations (3 health-based): Haloacetic Acids (HAA5)

What the violations mean

Haloacetic Acids (HAA5)

6 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Where the water comes from

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

Buys water from

Annual water quality report

Kensico Water District 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