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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Elon

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

 

86

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.363 ppb81ND - 2.90 ppb
2015ND140ND
20161.15 ppb165ND - 4.80 ppb
20171.74 ppb1611ND - 2.90 ppb
20180.400 ppb163ND - 2.20 ppb
20190.400 ppb163ND - 2.30 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
2014-02-1192189366002-2ND
2014-02-1192189366001-2ND
2014-05-2992203302001TTH-2ND
2014-05-2992203302002TTH-22.90 ppb
2014-08-1992214112009TTH-2ND
2014-08-1992214112010TTH-2ND
2014-11-1892226246001TTH-2ND
2014-11-1892226246002TTH-2ND
2015-02-25ND
2015-02-25ND
2015-05-20ND
2015-05-20ND
2015-05-20ND
2015-05-20ND
2015-08-24ND
2015-08-24ND
2015-08-24ND
2015-08-24ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2016-02-1692286793002TTH-2ND
2016-02-1692286793003TTH-2ND
2016-02-1692286793004TTH-22.70 ppb
2016-02-1692286793001TTH-22.40 ppb
2016-05-2492298939002TTHND
2016-05-2492298939003TTH-2ND
2016-05-2492298939004TTH-2ND
2016-05-2492298939005TTH-2ND
2016-08-2292309970011TTH-23.80 ppb
2016-08-2292309970014TTH-24.70 ppb
2016-08-2292309970013TTH-24.80 ppb
2016-08-3092310689001TTH-2ND
2016-11-1592319857001TTH-2ND
2016-11-1592319857002TTH-2ND
2016-11-1592319857003TTH-2ND
2016-11-1592319857004TTH-2ND
2017-02-1492329991001TTHND
2017-02-1492329991003TTH2.50 ppb
2017-02-1492329991004TTH2.50 ppb
2017-02-1492329991002TTH2.60 ppb
2017-05-1692340947003TTH2.20 ppb
2017-05-1692340947002TTH2.40 ppb
2017-05-1692340947001TTH2.40 ppb
2017-05-1692340947004TTH2.10 ppb
2017-08-2392352713001TTH2.90 ppb
2017-08-2392352713002TTH2.80 ppb
2017-08-2392352713003TTH2.80 ppb
2017-08-2392352713004TTH2.70 ppb
2017-11-1492363453001TTHND
2017-11-1492363453002TTHND
2017-11-1492363453003TTHND
2017-11-1492363453004TTHND
2018-02-2692374989004TTH ND
2018-02-2692374989003TTH 2.20 ppb
2018-02-2692374989002TTH 2.00 ppb
2018-02-2692374989001TTH 2.20 ppb
2018-05-2292385734004TTH ND
2018-05-2292385734001TTH ND
2018-05-2292385734002TTH ND
2018-05-2292385734003TTH ND
2018-08-2892397713004TTH ND
2018-08-2892397713003TTH ND
2018-08-2892397713002TTH ND
2018-08-2892397713001TTH ND
2018-11-2692408354001TTH ND
2018-11-2692408354002TTH ND
2018-11-2692408354003TTH ND
2018-11-2692408354004TTH ND
2019-02-1992418331001_37702.30 ppb
2019-02-1992418331003_37702.10 ppb
2019-02-1992418331004_3770ND
2019-02-1992418331005_37702.00 ppb
2019-05-2192430102001_3770ND
2019-05-2192430102005_3770ND
2019-05-2192430102003_3770ND
2019-05-2192430102002_3770ND
2019-08-2692443067002_3770ND
2019-08-2692443067004_3770ND
2019-08-2692443067003_3770ND
2019-08-2692443067001_3770ND
2019-11-1992454503004_3770ND
2019-11-1992454503003_3770ND
2019-11-1992454503002_3770ND
2019-11-1992454503001_3770ND