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EWG's Tap Water Database — 2021 UPDATE

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Arsenic

United Water Westchester Rate District 1

NOTE: United Water Westchester Rate District 1 purchases water from New York City System which is required to test for arsenic. Sample information shown below was taken by New York City System.

Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.

MORE ABOUT THIS CONTAMINANT

 

340

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND530ND
2016ND30ND
2017ND30ND
2018ND30ND
2019ND30ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.004 ppb

The EWG Health Guideline of 0.004 ppb for arsenic was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 10 ppb

The legal limit for arsenic, established in 2001, was based on costs for arsenic removal, as calculated at the time that the standard was set. This limit does not fully protect against the risk of cancer due to arsenic exposure.

ppb = parts per billion

All test results

NOTE: United Water Westchester Rate District 1 purchases water from New York City System which is required to test for arsenic. Sample information shown below was taken by New York City System.

Date Lab ID Result
2014-01-07439ND
2014-01-07437ND
2014-01-07438ND
2014-02-042711ND
2014-02-042712ND
2014-02-042710ND
2014-02-042713ND
2014-03-055074ND
2014-03-055075ND
2014-03-055073ND
2014-04-017303ND
2014-04-017305ND
2014-04-017304ND
2014-05-0610218ND
2014-05-0610221ND
2014-05-0610220ND
2014-05-0610219ND
2014-06-0312553ND
2014-06-0312554ND
2014-06-0312555ND
2014-07-0815903ND
2014-07-0815905ND
2014-07-0815904ND
2014-08-0518379ND
2014-08-0518382ND
2014-08-0518380ND
2014-08-0518381ND
2014-09-0921341ND
2014-09-0921340ND
2014-09-0921339ND
2014-10-0723781ND
2014-10-0723780ND
2014-10-0723779ND
2014-11-0526217ND
2014-11-0526216ND
2014-11-0526215ND
2014-11-0526214ND
2014-12-0228269ND
2014-12-0228268ND
2014-12-0228270ND
2015-01-06341ND
2015-01-06340ND
2015-01-06339ND
2015-02-042736ND
2015-02-042739ND
2015-02-042737ND
2015-02-042738ND
2015-03-034872ND
2015-03-034874ND
2015-03-034873ND
2015-04-077757ND
2015-04-077755ND
2015-04-077756ND
2015-05-019862ND
2015-05-019863ND
2015-05-019864ND
2015-05-019861ND
2015-05-0510215ND
2015-06-0212726ND
2015-06-0212727ND
2015-06-0212725ND
2015-06-0212724ND
2015-06-0212728ND
2015-07-0716185ND
2015-07-0716183ND
2015-07-0716182ND
2015-07-0716184ND
2015-07-0716181ND
2015-08-0418861ND
2015-08-0418860ND
2015-08-0418858ND
2015-08-0418859ND
2015-08-0418857ND
2015-09-0221699ND
2015-09-0221703ND
2015-09-0221702ND
2015-09-0221701ND
2015-09-0221700ND
2015-10-0725088ND
2015-10-0725085ND
2015-10-0725084ND
2015-10-0725087ND
2015-10-0725086ND
2015-11-0427784ND
2015-11-0427712ND
2015-11-0427787ND
2015-11-0427788ND
2015-11-0427783ND
2015-12-0130250ND
2015-12-0130252ND
2015-12-0130253ND
2015-12-0130251ND
2015-12-0130254ND
2016-01-0633336ND
2016-01-0633338ND
2016-01-0633335ND
2016-01-0633339ND
2016-01-0633337ND
2016-02-0235937ND
2016-02-0235941ND
2016-02-0235938ND
2016-02-0235939ND
2016-02-0235940ND
2016-03-0138625ND
2016-03-0138624ND
2016-03-0138626ND
2016-03-0138627ND
2016-03-0138623ND
2016-04-0542188ND
2016-04-0542187ND
2016-04-0542189ND
2016-04-0542190ND
2016-04-0542191ND
2016-05-0345115ND
2016-05-0345114ND
2016-05-0345113ND
2016-05-0345117ND
2016-05-0345116ND
2016-06-0748495ND
2016-06-0748493ND
2016-06-0748496ND
2016-06-0748492ND
2016-06-0748494ND
2016-07-1252407ND
2016-07-1252406ND
2016-07-1252408ND
2016-07-1252410ND
2016-07-1252409ND
2016-08-0955666ND
2016-08-0955662ND
2016-08-0955663ND
2016-08-0955665ND
2016-08-0955664ND
2016-09-0758761ND
2016-09-0758760ND
2016-09-0758762ND
2016-09-0758763ND
2016-09-0758764ND
2016-10-0561747ND
2016-10-0561749ND
2016-10-0561748ND
2016-10-0561746ND
2016-10-0561750ND
2016-11-0164453ND
2016-11-0164455ND
2016-11-0164456ND
2016-11-0164454ND
2016-11-0164457ND
2016-12-0667872ND
2016-12-0667866ND
2016-12-0667865ND
2016-12-0667871ND
2016-12-0667813ND
2017-01-04389ND
2017-01-04391ND
2017-01-04386ND
2017-01-04388ND
2017-01-04390ND
2017-02-073706ND
2017-02-073703ND
2017-02-073707ND
2017-02-073708ND
2017-02-073704ND
2017-02-073705ND
2017-03-076309ND
2017-03-076310ND
2017-03-076308ND
2017-03-076307ND
2017-03-076305ND
2017-04-048978ND
2017-04-048981ND
2017-04-048980ND
2017-04-048976ND
2017-04-048979ND
2017-05-0211732ND
2017-05-0211730ND
2017-05-0211731ND
2017-05-0211734ND
2017-05-0211733ND
2017-05-0211735ND
2017-06-0615125ND
2017-06-0615121ND
2017-06-0615123ND
2017-06-0615124ND
2017-06-0615126ND
2017-07-0518090ND
2017-07-0518087ND
2017-07-0518091ND
2017-07-0518092ND
2017-07-0518089ND
2017-08-0121343ND
2017-08-0121336ND
2017-08-0121291ND
2017-08-0121342ND
2017-08-0121341ND
2017-08-0121335ND
2017-09-0625073ND
2017-09-0625071ND
2017-09-0625069ND
2017-09-0625074ND
2017-09-0625072ND
2017-10-0428092ND
2017-10-0428088ND
2017-10-0428093ND
2017-10-0428090ND
2017-10-0428091ND
2017-11-0831822ND
2017-11-0831824ND
2017-11-0831825ND
2017-11-0831823ND
2017-11-0831826ND
2017-11-0831827ND
2017-12-0534541ND
2017-12-0534544ND
2017-12-0534543ND
2017-12-0534539ND
2017-12-0534542ND
2018-01-03220ND
2018-01-03217ND
2018-01-03219ND
2018-01-03331ND
2018-02-063723ND
2018-02-063726ND
2018-02-063722ND
2018-02-063724ND
2018-02-063727ND
2018-02-063725ND
2018-03-066556ND
2018-03-066555ND
2018-03-066553ND
2018-03-066557ND
2018-03-066558ND
2018-04-039462ND
2018-04-039464ND
2018-04-039465ND
2018-04-039460ND
2018-04-039463ND
2018-05-0112602ND
2018-05-0112600ND
2018-05-0112597ND
2018-05-0112599ND
2018-05-0112601ND
2018-05-0112598ND
2018-06-0516473ND
2018-06-0516474ND
2018-06-0516470ND
2018-06-0516475ND
2018-06-0516472ND
2018-07-1020628ND
2018-07-1020631ND
2018-07-1020633ND
2018-07-1020630ND
2018-07-1020632ND
2018-08-0723709ND
2018-08-0723700ND
2018-08-0723703ND
2018-08-0723702ND
2018-08-0723705ND
2018-08-0723707ND
2018-09-0526811ND
2018-09-0526848ND
2018-09-0526847ND
2018-09-0526812ND
2018-09-0526871ND
2018-10-0329869ND
2018-10-0329870ND
2018-10-0329854ND
2018-10-0329920ND
2018-10-0329853ND
2018-11-0733688ND
2018-11-0733664ND
2018-11-0733737ND
2018-11-0733666ND
2018-11-0733738ND
2018-11-0733665ND
2018-12-0436336ND
2018-12-0436314ND
2018-12-0436335ND
2018-12-0436315ND
2018-12-0436302ND
2019-01-02131ND
2019-01-02138ND
2019-01-02132ND
2019-01-02137ND
2019-01-02182ND
2019-02-053650ND
2019-02-053651ND
2019-02-053649ND
2019-02-053638ND
2019-02-053637ND
2019-02-053587ND
2019-03-056444ND
2019-03-056435ND
2019-03-056428ND
2019-03-056434ND
2019-03-056429ND
2019-04-029265ND
2019-04-029215ND
2019-04-029214ND
2019-04-029276ND
2019-04-029264ND
2019-05-0712968ND
2019-05-0712969ND
2019-05-0712937ND
2019-05-0712918ND
2019-05-0712936ND
2019-05-0712935ND
2019-06-0415851ND
2019-06-0415875ND
2019-06-0415869ND
2019-06-0415868ND
2019-06-0415874ND
2019-07-0219008ND
2019-07-0218974ND
2019-07-0218973ND
2019-07-0218961ND
2019-07-0218962ND
2019-08-0622818ND
2019-08-0622813ND
2019-08-0622812ND
2019-08-0622852ND
2019-08-0622853ND
2019-08-0622851ND
2019-09-0426009ND
2019-09-0425974ND
2019-09-0425973ND
2019-09-0425962ND
2019-09-0426008ND
2019-10-0128877ND
2019-10-0128906ND
2019-10-0128900ND
2019-10-0128907ND
2019-10-0128901ND
2019-11-0632961ND
2019-11-0632960ND
2019-12-0335851ND
2019-12-0335799ND
2019-12-0335844ND
2019-12-0335845ND
2019-12-0335850ND