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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Marshall

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
2013N/A00N/A
2014ND160ND
2015ND160ND
20161.17 ppb161ND - 18.7 ppb
2017ND140ND
2018ND180ND
2019ND160ND

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
2014-03-31AC19891ND
2014-03-31AC19892ND
2014-03-31AC19893ND
2014-03-31AC19894ND
2014-06-30AC28637ND
2014-06-30AC28639ND
2014-06-30AC28641ND
2014-06-30AC28643ND
2014-09-30AC35630ND
2014-09-30AC35631ND
2014-09-30AC35632ND
2014-09-30AC35629ND
2014-12-30AC39502ND
2014-12-30AC39503ND
2014-12-30AC39500ND
2014-12-31AC39501ND
2015-03-25AC43580ND
2015-03-25AC43581ND
2015-03-25AC43579ND
2015-03-25AC43582ND
2015-06-23AC51247ND
2015-06-23AC51248ND
2015-06-23AC51249ND
2015-06-23AC51246ND
2015-09-29AC59522ND
2015-09-29AC59523ND
2015-09-29AC59521ND
2015-09-30AC59520ND
2015-12-21AC63953ND
2015-12-21AC63952ND
2015-12-21AC63950ND
2015-12-21AC63951ND
2016-03-28AC67652ND
2016-03-28AC6765418.7 ppb
2016-03-28AC67651ND
2016-03-28AC67653ND
2016-06-27AC74895ND
2016-06-27AC74894ND
2016-06-27AC74893ND
2016-06-27AC74892ND
2016-09-29AC83874ND
2016-09-29AC83872ND
2016-09-29AC83873ND
2016-09-29AC83871ND
2016-12-30AC88465ND
2016-12-30AC88463ND
2016-12-30AC88464ND
2016-12-30AC88466ND
2017-03-30AC92151ND
2017-03-30AC92152ND
2017-03-30AC92150ND
2017-03-30AC92149ND
2017-07-03AC98490ND
2017-07-03AC98489ND
2017-07-03AC98488ND
2017-07-03AC98491ND
2017-09-28AD06468ND
2017-09-28AD06466ND
2017-09-28AD06469ND
2017-09-28AD06467ND
2017-12-29AD10621ND
2017-12-29AD10618ND
2018-01-02AD10619ND
2018-01-02AD10620ND
2018-03-30AD16496ND
2018-03-30AD16497ND
2018-03-30AD16498ND
2018-03-30AD16499ND
2018-06-27AD27310ND
2018-06-27AD27308ND
2018-06-27AD27307ND
2018-06-28AD27309ND
2018-09-27AD32932ND
2018-09-27AD32933ND
2018-09-27AD32934ND
2018-09-27AD32935ND
2018-11-27AD36569ND
2018-11-27AD36572ND
2018-11-27AD36570ND
2018-11-27AD36571ND
2019-03-19AD40525ND
2019-03-19AD40527ND
2019-03-19AD40526ND
2019-03-19AD40524ND
2019-06-13AD49118ND
2019-06-13AD49119ND
2019-06-13AD49120ND
2019-06-13AD49121ND
2019-09-16AD55206ND
2019-09-16AD55204ND
2019-09-16AD55203ND
2019-09-16AD55205ND
2019-12-17AD59110ND
2019-12-17AD59111ND
2019-12-17AD59112ND
2019-12-17AD59113ND