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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Lynnwood

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
2014ND160ND
2015ND160ND
2016ND160ND
20172.06 ppb1611ND - 4.10 ppb
20180.138 ppb161ND - 2.20 ppb
20190.306 ppb162ND - 2.90 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
2014-02-2007754ND
2014-02-2007755ND
2014-02-2007756ND
2014-02-2007757ND
2014-05-2021937ND
2014-05-2021940ND
2014-05-2021938ND
2014-05-2021939ND
2014-08-2137627ND
2014-08-2137628ND
2014-08-2137626ND
2014-08-2137625ND
2014-11-2452459ND
2014-11-2452456ND
2014-11-2452457ND
2014-11-2452458ND
2015-02-2508374ND
2015-02-2508375ND
2015-02-2508377ND
2015-02-2508376ND
2015-05-2022871ND
2015-05-2022872ND
2015-05-2022873ND
2015-05-2022874ND
2015-08-2540286ND
2015-08-2540287ND
2015-08-2540288ND
2015-08-2540285ND
2015-11-2457003ND
2015-11-2457002ND
2015-11-2457001ND
2015-11-2457000ND
2016-02-23ND
2016-02-23ND
2016-02-23ND
2016-02-23ND
2016-05-24ND
2016-05-24ND
2016-05-24ND
2016-05-24ND
2016-08-26ND
2016-08-26ND
2016-08-26ND
2016-08-26ND
2016-11-22ND
2016-11-22ND
2016-11-22ND
2016-11-22ND
2017-02-243.70 ppb
2017-02-243.70 ppb
2017-02-243.80 ppb
2017-02-244.10 ppb
2017-05-24ND
2017-05-242.60 ppb
2017-05-242.70 ppb
2017-05-242.40 ppb
2017-08-172.20 ppb
2017-08-173.00 ppb
2017-08-172.10 ppb
2017-08-172.70 ppb
2017-11-29ND
2017-11-29ND
2017-11-29ND
2017-11-29ND
2018-02-15ND
2018-02-15ND
2018-02-15ND
2018-02-15ND
2018-05-23ND
2018-05-23ND
2018-05-23ND
2018-05-23ND
2018-08-30ND
2018-08-30ND
2018-08-302.20 ppb
2018-08-30ND
2018-11-27ND
2018-11-27ND
2018-11-27ND
2018-11-27ND
2019-02-25ND
2019-02-25ND
2019-02-25ND
2019-02-25ND
2019-05-22ND
2019-05-22ND
2019-05-22ND
2019-05-22ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-11-132.90 ppb
2019-11-132.00 ppb
2019-11-13ND
2019-11-13ND