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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Mission

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
2017ND160ND
2018ND160ND
20190.544 ppb162ND - 5.80 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
2014-03-20AC47886ND
2014-03-20AC47890ND
2014-03-20AC47884ND
2014-03-20AC47897ND
2014-05-05AC53026ND
2014-05-05AC52978ND
2014-05-05AC52992ND
2014-05-05AC53024ND
2014-08-19AC64454ND
2014-08-19AC64450ND
2014-08-19AC64451ND
2014-08-19AC64415ND
2014-12-10AC74315ND
2014-12-10AC74320ND
2014-12-10AC74313ND
2014-12-10AC74314ND
2015-02-05AC79441ND
2015-02-05AC79462ND
2015-02-05AC79461ND
2015-02-05AC79460ND
2015-05-06AC90713ND
2015-05-06AC90711ND
2015-05-06AC90716ND
2015-05-06AC90709ND
2015-08-06AD02907ND
2015-08-06AD02902ND
2015-08-06AD02905ND
2015-08-06AD02880ND
2015-11-05AD12769ND
2015-11-05AD12771ND
2015-11-05AD12766ND
2015-11-05AD12765ND
2016-02-02AD21420ND
2016-02-02AD21414ND
2016-02-02AD21417ND
2016-02-02AD21415ND
2016-05-11AD36376ND
2016-05-11AD36306ND
2016-05-11AD36310ND
2016-05-11AD36304ND
2016-09-13AD49348ND
2016-09-13AD49349ND
2016-09-13AD49351ND
2016-09-13AD49346ND
2016-10-27AD55113ND
2016-10-27AD55108ND
2016-10-27AD55105ND
2016-10-27AD55103ND
2017-03-08AD74307ND
2017-03-08AD74324ND
2017-03-08AD74322ND
2017-03-08AD74318ND
2017-04-25AD81484ND
2017-04-25AD81487ND
2017-04-25AD81489ND
2017-04-25AD81488ND
2017-08-02AD92136ND
2017-08-02AD92132ND
2017-08-02AD92145ND
2017-08-02AD92127ND
2017-11-08AE04309ND
2017-11-08AE04308ND
2017-11-08AE04311ND
2017-11-08AE04317ND
2018-03-05AE16915ND
2018-03-05AE16939ND
2018-03-05AE16914ND
2018-03-05AE16930ND
2018-05-17AE26744ND
2018-05-17AE26761ND
2018-05-17AE26757ND
2018-05-17AE26758ND
2018-08-27AE38661ND
2018-08-27AE38680ND
2018-08-27AE38666ND
2018-08-27AE38659ND
2018-12-05AE48171ND
2018-12-05AE48181ND
2018-12-05AE48169ND
2018-12-05AE48175ND
2019-01-15AE50095ND
2019-01-15AE50086ND
2019-01-15AE50082ND
2019-01-15AE50098ND
2019-06-12AE705685.80 ppb
2019-06-12AE70566ND
2019-06-12AE705612.90 ppb
2019-06-12AE70564ND
2019-09-17AE83575ND
2019-09-17AE83783ND
2019-09-17AE83784ND
2019-09-17AE83785ND
2019-12-04AE91418ND
2019-12-04AE91417ND
2019-12-04AE91413ND
2019-12-04AE91419ND