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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Sedgwick

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

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.938 ppb83ND - 2.50 ppb
20150.263 ppb81ND - 2.10 ppb
20160.338 ppb81ND - 2.70 ppb
2017ND80ND
20180.275 ppb81ND - 2.20 ppb
20191.04 ppb83ND - 3.40 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
2014-03-1014072000501ND
2014-03-1014072000401ND
2014-05-06141280033012.50 ppb
2014-05-0614128003401ND
2014-09-15142610016012.50 ppb
2014-09-15142610014012.50 ppb
2014-11-2414330004101ND
2014-11-2414330004201ND
2015-03-1015071001301ND
2015-03-1015071001401ND
2015-05-27151480020012.10 ppb
2015-05-2715148002101ND
2015-08-1815231000801ND
2015-08-1815231000701ND
2015-11-1115317008401ND
2015-11-1115317008501ND
2016-03-0916070006901ND
2016-03-0916070006801ND
2016-05-1616140007001ND
2016-06-21161740014012.70 ppb
2016-08-2216238000501ND
2016-08-2216238000401ND
2016-10-3116308003801ND
2016-10-3116308003901ND
2017-02-1317046000901ND
2017-02-1317046000801ND
2017-05-2917152007601ND
2017-05-2917152007501ND
2017-08-2817242001501ND
2017-08-2817242001401ND
2017-11-2717333001201ND
2017-11-2717333001301ND
2018-02-2718059001301ND
2018-02-2718059001401ND
2018-05-2218144001701ND
2018-05-2218144001601ND
2018-09-0518249002701ND
2018-09-0518249002601ND
2018-11-1918325001401ND
2018-11-19183250013012.20 ppb
2019-02-1819052000701ND
2019-02-1819052000801ND
2019-04-3019122003301ND
2019-04-3019122003401ND
2019-08-26192400040012.60 ppb
2019-08-26192400031013.40 ppb
2019-11-26193310002012.30 ppb
2019-11-2619331000101ND