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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Lakeway MUD

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
20150.194 ppb161ND - 3.10 ppb
20160.350 ppb162ND - 2.90 ppb
2017ND160ND
20180.181 ppb161ND - 2.90 ppb
20190.413 ppb162ND - 3.80 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
2014-03-19AC47700ND
2014-03-19AC47698ND
2014-03-19AC47717ND
2014-03-19AC47716ND
2014-06-16AC56943ND
2014-06-16AC56940ND
2014-06-16AC56944ND
2014-06-16AC56932ND
2014-08-20AC64726ND
2014-08-20AC64701ND
2014-08-20AC64700ND
2014-08-20AC64730ND
2014-11-20AC72669ND
2014-11-20AC72668ND
2014-11-20AC72666ND
2014-11-20AC72663ND
2015-03-10AC83457ND
2015-03-10AC83460ND
2015-03-10AC83478ND
2015-03-10AC83456ND
2015-05-18AC92295ND
2015-05-18AC92296ND
2015-05-18AC92298ND
2015-05-18AC92293ND
2015-09-10AD06526ND
2015-09-10AD06525ND
2015-09-10AD06528ND
2015-09-10AD06529ND
2015-12-02AD15123ND
2015-12-02AD151183.10 ppb
2015-12-02AD15119ND
2015-12-02AD15120ND
2016-02-17AD23899ND
2016-02-17AD23895ND
2016-02-17AD238962.90 ppb
2016-02-17AD238982.70 ppb
2016-05-23AD37687ND
2016-05-23AD37715ND
2016-05-23AD37688ND
2016-05-23AD37690ND
2016-07-27AD45962ND
2016-07-27AD45963ND
2016-07-27AD45961ND
2016-07-27AD45957ND
2016-11-07AD56791ND
2016-11-07AD56795ND
2016-11-07AD56792ND
2016-11-07AD56789ND
2017-01-26AD67090ND
2017-01-26AD67113ND
2017-01-26AD67109ND
2017-01-26AD67103ND
2017-04-25AD80929ND
2017-04-25AD80928ND
2017-04-25AD80925ND
2017-04-25AD80927ND
2017-08-31AD94606ND
2017-08-31AD94609ND
2017-08-31AD94607ND
2017-08-31AD94610ND
2017-10-31AE02897ND
2017-10-31AE02890ND
2017-10-31AE02895ND
2017-10-31AE02896ND
2018-03-06AE16926ND
2018-03-06AE16927ND
2018-03-06AE16928ND
2018-03-06AE16924ND
2018-05-22AE27200ND
2018-05-22AE27198ND
2018-05-22AE272082.90 ppb
2018-05-22AE27207ND
2018-07-18AE33777ND
2018-07-18AE33719ND
2018-07-18AE33771ND
2018-07-18AE33713ND
2018-11-20AE46603ND
2018-11-20AE46596ND
2018-11-20AE46602ND
2018-11-20AE46597ND
2019-01-24AE51179ND
2019-01-24AE51176ND
2019-01-24AE511842.80 ppb
2019-01-24AE51178ND
2019-05-02AE64618ND
2019-05-02AE64606ND
2019-05-02AE64605ND
2019-05-02AE64613ND
2019-07-09AE73659ND
2019-07-09AE73660ND
2019-07-09AE73658ND
2019-07-09AE73632ND
2019-11-18AE89485ND
2019-11-18AE89482ND
2019-11-18AE89483ND
2019-11-18AE894863.80 ppb