Westchester Joint Water Works Water System

MyTapWater.org's tap water quality report is the compilation of data collected from federal, state, and local government agencies, most prominently the EPA. We strive to populate the report with the latest data concerning water contaminants, lead and copper levels, and water quality violations. We only collect drinking water data from public water systems.

PWS Service Information
PWS ID: NY5903435
Type: Community water system
EPA Region: 02
Primary Service Area: Municipality
Primary Source: Surface water
Population Served: 59,629
Contact Information
Village of Mamaroneck
[email protected]

This public water system services 1 municipality in 1 county.

Summary Results

A summary view of tests in which a water contaminant found to exceed the Maximum Contaminant Level (MCL) set by the EPA.

We couldn't find any records of contaminants exceeding the regulated limits in your water.

Other Water Contaminants Tested

The following contaminants were tested and found to be within national EPA guidelines.

We couldn't find any records of contaminants in your water.

Lead and Copper Data

Lead and copper are recorded separately from other contaminants because of the Lead and Copper Rule. As with all other results, these are the findings at the water supply level. Lead and copper can be — and often are — deposited in drinking water in between the water facility and your tap.

Sample ID Contaminant Sampling Start Date Sampling End Date Result
NY134026 lead 2018-01-01 2018-12-31 0.0048mg/L
NY126877 lead 2017-01-01 2017-12-31 0.0039mg/L
NY117823 lead 2016-01-01 2016-12-31 0.0044mg/L
NY109747 lead 2015-01-01 2015-12-31 0.0025mg/L
NY104959 lead 2014-01-01 2014-12-31 0.0028mg/L
NY88626 lead 2013-01-01 2013-12-31 0.005mg/L
NY99828 lead 2013-01-01 2013-12-31 0.0027mg/L
NY104961 lead 2012-01-01 2012-12-31 0.005mg/L
NY79284 lead 2011-01-01 2011-12-31 0.0033mg/L
70255 lead 2010-07-01 2010-12-31 0.0049mg/L
NY63724 lead 2010-01-01 2010-06-30 0.0088mg/L
NY60322 lead 2009-07-01 2009-12-31 0.0169mg/L
NY55782 lead 2008-07-01 2008-12-31 0.0071mg/L
NY56245 lead 2008-01-01 2008-06-30 0.0061mg/L


Known violations of the Safe Drinking Water Act as recorded by the EPA.

Compliance Dates Rule Violation Type Contaminant Name Status
2009-01-01 - 2009-06-30 Lead and Copper Rule Water Quality Parameter M/R Lead and Copper Rule Returned to Compliance
2005-04-01 - 2005-06-30 Stage 1 Disinfectants and Disinfection Byproducts Rule Monitoring and Reporting (DBP) Total Haloacetic Acids (HAA5) Returned to Compliance
- N/A Nitrates Monitoring, Regular Nitrate Known
- N/A Surface Water Treatment Rule Failure to Filter (SWTR) Surface Water Treatment Rule Open
2007-10-01 - N/A Lead and Copper Rule Follow-up Or Routine LCR Tap M/R Lead and Copper Rule Returned to Compliance
2009-01-01 - N/A Lead and Copper Rule Initial, Follow-up, or Routine Source Water M/R Lead and Copper Rule Returned to Compliance

Local Water Testing

Find a lab in your area so you can get your tap or well water tested. This list contains both governmental and private labs, all of which are EPA-certified for drinking water testing.

Lab Location Zip Code

Water Bill Information

Convenient information about your water service.

Unable to identify any billing information about Westchester Joint Water Works (NY5903435).

What My Water Data Means

Water data isn't always easy to interpret, but by following the links on this page you should be able to have most of your questions answered. By clicking the name of a water contaminant or secondary substance you can learn about that specific substance. Ultimately this page should give you some insight towards learning if your water is safe, what water filter you should buy (if any), and how well your local water compares against other sources.


The origin of MyTapWater.org's water data is explained on our Data Sources page.

Why Is My Water Data Not More Recent?

The recency of the data for your ZIP code depends on the last your water source was tested, by a federal, state, or local agency. More information about the timing can be determined by learning about the dataset in question and seeing how often the EPA (other another governing body) mandated testing.