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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Westchester Joint Water Works

Monochloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

183

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0332 ppb311ND - 1.03 ppb
2015ND240ND
20160.0369 ppb321ND - 1.18 ppb
20171.04 ppb328ND - 5.01 ppb
20180.765 ppb3217ND - 1.90 ppb
20190.747 ppb3217ND - 2.00 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic acid was proposed in 2020 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 system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-27AQ01417DBPND
2014-01-27AQ01414DBPND
2014-01-27AQ01418DBPND
2014-01-27AQ01420DBPND
2014-01-27AQ01415DBPND
2014-01-27AQ01419DBPND
2014-01-27AQ01416DBPND
2014-01-27AQ01421DBPND
2014-04-28AQ07645DBPND
2014-04-28AQ07643DBPND
2014-04-28AQ07641DBPND
2014-04-28AQ07644DBPND
2014-04-28AQ07646DBPND
2014-04-28AQ07639DBPND
2014-04-28AQ07642DBPND
2014-07-28AQ15320DBPND
2014-07-28AQ15316DBPND
2014-07-28AQ15319DBPND
2014-07-28AQ15321DBPND
2014-07-28AQ15314DBPND
2014-07-28AQ15315DBPND
2014-07-28AQ15317DBPND
2014-07-28AQ15318DBPND
2014-10-27AQ22239DBPND
2014-10-27AQ22238DBPND
2014-10-27AQ22235DBPND
2014-10-27AQ22236DBPND
2014-10-27AQ22233DBPND
2014-10-27AQ22234DBPND
2014-10-27AQ22237DBP1.03 ppb
2014-10-27AQ22232DBPND
2015-01-26AR01728ND
2015-01-26AR01727ND
2015-01-26AR01732ND
2015-01-26AR01730ND
2015-01-26AR01729ND
2015-01-26AR01726ND
2015-01-26AR01731ND
2015-01-26AR01733ND
2015-04-27AR08655ND
2015-04-27AR08657ND
2015-04-27AR08652ND
2015-04-27AR08653ND
2015-04-27AR08656ND
2015-04-27AR08654ND
2015-04-27AR08658ND
2015-04-27AR08659ND
2015-07-27AR15942ND
2015-07-27AR15934ND
2015-07-27AR15935ND
2015-07-27AR15933ND
2015-07-27AR15931ND
2015-07-27AR15937ND
2015-07-27AR15936ND
2015-07-27AR15932ND
2016-01-25AS01544ND
2016-01-25AS01541ND
2016-01-25AS01542ND
2016-01-25AS01538ND
2016-01-25AS01539ND
2016-01-25AS01543ND
2016-01-25AS01540ND
2016-01-25AS01537ND
2016-04-25AS08453ND
2016-04-25AS08456ND
2016-04-25AS08454ND
2016-04-25AS08455ND
2016-04-25AS08457ND
2016-04-25AS08451ND
2016-04-25AS08452ND
2016-04-25AS08450ND
2016-07-25AS158571.18 ppb
2016-07-25AS15858ND
2016-07-25AS15859ND
2016-07-25AS15855ND
2016-07-25AS15854ND
2016-07-25AS15861ND
2016-07-25AS15860ND
2016-07-25AS15856ND
2016-10-24AS22681ND
2016-10-24AS22679ND
2016-10-24AS22685ND
2016-10-24AS22678ND
2016-10-24AS22683ND
2016-10-24AS22680ND
2016-10-24AS22682ND
2016-10-24AS22684ND
2017-01-23AT01482ND
2017-01-23AT014793.81 ppb
2017-01-23AT014784.89 ppb
2017-01-23AT014805.01 ppb
2017-01-23AT014754.55 ppb
2017-01-23AT014814.59 ppb
2017-01-23AT014772.73 ppb
2017-01-23AT014764.01 ppb
2017-04-24AT07845ND
2017-04-24AT07841ND
2017-04-24AT078383.53 ppb
2017-04-24AT07839ND
2017-04-24AT07843ND
2017-04-24AT07842ND
2017-04-24AT07844ND
2017-04-24AT07840ND
2017-07-24AT15308DBPND
2017-07-24AT15306DBPND
2017-07-24AT15312DBPND
2017-07-24AT15310DBPND
2017-07-24AT15311DBPND
2017-07-24AT15305DBPND
2017-07-24AT15307DBPND
2017-07-24AT15309DBPND
2017-10-23AT22378ND
2017-10-23AT22383ND
2017-10-23AT22377ND
2017-10-23AT22379ND
2017-10-23AT22380ND
2017-10-23AT22382ND
2017-10-23AT22384ND
2017-10-23AT22381ND
2018-01-22AU01526DBP2ND
2018-01-22AU01531DBP2ND
2018-01-22AU01529DBP2ND
2018-01-22AU01532DBP2ND
2018-01-22AU01533DBP2ND
2018-01-22AU01530DBP2ND
2018-01-22AU01528DBP2ND
2018-01-22AU01527DBP2ND
2018-04-23AU08177DBP21.39 ppb
2018-04-23AU08179DBP21.12 ppb
2018-04-23AU08178DBP21.08 ppb
2018-04-23AU08175DBP21.59 ppb
2018-04-23AU08176DBP21.90 ppb
2018-04-23AU08172DBP21.02 ppb
2018-04-23AU08173DBP21.86 ppb
2018-04-23AU08174DBP21.13 ppb
2018-07-23AU15572DBP21.08 ppb
2018-07-23AU15566DBP21.71 ppb
2018-07-23AU15568DBP2ND
2018-07-23AU15571DBP2ND
2018-07-23AU15567DBP2ND
2018-07-23AU15569DBP21.03 ppb
2018-07-23AU15573DBP21.16 ppb
2018-07-23AU15570DBP21.54 ppb
2018-10-22AU22905DBP21.88 ppb
2018-10-22AU22899DBP2ND
2018-10-22AU22900DBP2ND
2018-10-22AU22904DBP21.86 ppb
2018-10-22AU22906DBP21.52 ppb
2018-10-22AU22901DBP2ND
2018-10-22AU22902DBP2ND
2018-10-22AU22903DBP21.62 ppb
2019-01-22AV01581DBP21.53 ppb
2019-01-22AV01580DBP21.47 ppb
2019-01-22AV01576DBP21.60 ppb
2019-01-22AV01575DBP2ND
2019-01-22AV01578DBP21.77 ppb
2019-01-22AV01582DBP21.41 ppb
2019-01-22AV01579DBP22.00 ppb
2019-01-22AV01577DBP21.36 ppb
2019-04-22AV08017DBP2ND
2019-04-22AV08020DBP21.14 ppb
2019-04-22AV08021DBP2ND
2019-04-22AV08023DBP21.01 ppb
2019-04-22AV08018DBP21.15 ppb
2019-04-22AV08019DBP2ND
2019-04-22AV08024DBP21.23 ppb
2019-04-22AV08022DBP2ND
2019-07-22AV15314DBP21.53 ppb
2019-07-22AV15313DBP2ND
2019-07-22AV15311DBP2ND
2019-07-22AV15316DBP2ND
2019-07-22AV15315DBP2ND
2019-07-22AV15317DBP2ND
2019-07-22AV15312DBP2ND
2019-07-22AV15310DBP2ND
2019-10-21AV22279DBP21.30 ppb
2019-10-21AV22282DBP2ND
2019-10-21AV22280DBP21.17 ppb
2019-10-21AV22284DBP2ND
2019-10-21AV22281DBP21.01 ppb
2019-10-21AV22283DBP2ND
2019-10-21AV22277DBP21.49 ppb
2019-10-21AV22278DBP21.73 ppb