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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

SIRWA #2 (Creston)

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.250 ppb162ND - 2.00 ppb
20151.38 ppb167ND - 5.00 ppb
20161.38 ppb166ND - 5.00 ppb
20170.938 ppb164ND - 4.00 ppb
20180.125 ppb161ND - 2.00 ppb
20190.563 ppb164ND - 3.00 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
2014-01-2020297622.00 ppb
2014-01-202029759ND
2014-01-202029763ND
2014-01-202029758ND
2014-04-152046306ND
2014-04-152046305ND
2014-04-152046304ND
2014-04-152046303ND
2014-07-0120608782.00 ppb
2014-07-012060877ND
2014-07-012060880ND
2014-07-012060879ND
2014-10-012084980ND
2014-10-012084979ND
2014-10-012084978ND
2014-10-012084977ND
2015-01-26OE211833ND
2015-01-26OE211832ND
2015-01-26OE211831ND
2015-01-26OE211830ND
2015-04-06OE228776ND
2015-04-06OE228777ND
2015-04-06OE228775ND
2015-04-06OE228778ND
2015-07-13OE2677062.00 ppb
2015-07-13OE2677072.00 ppb
2015-07-13OE2677092.00 ppb
2015-07-13OE267708ND
2015-10-15OE3086453.00 ppb
2015-10-15OE3086444.00 ppb
2015-10-15OE3086464.00 ppb
2015-10-15OE3086435.00 ppb
2016-01-07OE334497ND
2016-01-07OE334498ND
2016-01-07OE334496ND
2016-01-07OE334499ND
2016-04-06OE363753ND
2016-04-06OE363754ND
2016-04-06OE363752ND
2016-04-06OE363751ND
2016-07-13OE401896ND
2016-07-13OE4019002.00 ppb
2016-07-13OE401897ND
2016-07-13OE4019012.00 ppb
2016-10-06OE4392234.00 ppb
2016-10-06OE4393455.00 ppb
2016-10-06OE4392225.00 ppb
2016-10-06OE4393464.00 ppb
2017-01-11OE470524ND
2017-01-11OE470523ND
2017-01-11OE470525ND
2017-01-11OE470522ND
2017-04-17OE503537ND
2017-04-17OE503536ND
2017-04-17OE503538ND
2017-04-17OE503539ND
2017-07-19OE540807ND
2017-07-19OE540809ND
2017-07-19OE540810ND
2017-07-19OE540808ND
2017-10-04OE5748403.00 ppb
2017-10-04OE5748414.00 ppb
2017-10-04OE5748424.00 ppb
2017-10-04OE5748394.00 ppb
2018-01-17OE612625ND
2018-01-17OE612624ND
2018-01-17OE612623ND
2018-01-17OE612622ND
2018-04-09OE644026ND
2018-04-09OE644023ND
2018-04-09OE644024ND
2018-04-09OE644025ND
2018-07-17OE685928ND
2018-07-17OE685927ND
2018-07-17OE685926ND
2018-07-17OE685925ND
2018-10-25OE7334862.00 ppb
2018-10-25OE733487ND
2018-10-25OE733488ND
2018-10-25OE733489ND
2019-01-15OE761596ND
2019-01-15OE761597ND
2019-01-15OE761598ND
2019-01-15OE761599ND
2019-04-17OE796493ND
2019-04-17OE796496ND
2019-04-17OE796495ND
2019-04-17OE796494ND
2019-07-08OE832431ND
2019-07-08OE832434ND
2019-07-08OE832433ND
2019-07-08OE832427ND
2019-10-29OE8869292.00 ppb
2019-10-29OE8869282.00 ppb
2019-10-29OE8869272.00 ppb
2019-10-29OE8869263.00 ppb