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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Harris County MUD 53

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
20151.39 ppb166ND - 6.40 ppb
20161.08 ppb166ND - 3.60 ppb
20170.125 ppb161ND - 2.00 ppb
2018ND160ND
20192.97 ppb169ND - 9.10 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
2014-02-21AC44254ND
2014-02-21AC44223ND
2014-02-21AC44220ND
2014-02-21AC44222ND
2014-05-22AC55108ND
2014-05-22AC55090ND
2014-05-22AC55110ND
2014-05-22AC55089ND
2014-08-15AC64102ND
2014-08-15AC64109ND
2014-08-15AC64100ND
2014-08-15AC64103ND
2014-11-14AC72149ND
2014-11-14AC72147ND
2014-11-14AC72120ND
2014-11-14AC72111ND
2015-01-21AC77210ND
2015-01-21AC77178ND
2015-01-21AC77183ND
2015-01-21AC77168ND
2015-04-15AC883374.10 ppb
2015-04-15AC88324ND
2015-04-15AC883362.80 ppb
2015-04-15AC883456.40 ppb
2015-07-29AD014722.50 ppb
2015-07-29AD01469ND
2015-07-29AD014882.70 ppb
2015-07-29AD01483ND
2015-12-04AD15651ND
2015-12-04AD15662ND
2015-12-04AD15695ND
2015-12-04AD156563.70 ppb
2016-01-25AD19659ND
2016-01-25AD196212.60 ppb
2016-01-25AD19653ND
2016-01-25AD196622.60 ppb
2016-04-20AD33597ND
2016-04-20AD33598ND
2016-04-20AD33596ND
2016-04-20AD33602ND
2016-07-15AD445023.60 ppb
2016-07-15AD445123.10 ppb
2016-07-15AD444992.60 ppb
2016-07-15AD445012.70 ppb
2016-12-16AD62556ND
2016-12-16AD62558ND
2016-12-16AD62555ND
2016-12-16AD62560ND
2017-02-06AD68703ND
2017-02-10AD70368ND
2017-02-10AD70367ND
2017-02-10AD70366ND
2017-05-05AD83030ND
2017-05-05AD83032ND
2017-05-05AD830312.00 ppb
2017-05-05AD83029ND
2017-07-07AD88625ND
2017-07-07AD88623ND
2017-07-07AD88629ND
2017-07-07AD88622ND
2017-10-27AE02679ND
2017-10-27AE02678ND
2017-10-27AE02676ND
2017-10-27AE02677ND
2018-02-08AE12962ND
2018-02-08AE12957ND
2018-02-08AE12959ND
2018-02-08AE12974ND
2018-05-07AE25284ND
2018-05-07AE25274ND
2018-05-07AE25278ND
2018-05-07AE25265ND
2018-08-23AE38405ND
2018-08-23AE38386ND
2018-08-23AE38404ND
2018-08-23AE38399ND
2018-10-25AE44598ND
2018-10-25AE44602ND
2018-10-25AE44600ND
2018-10-25AE44599ND
2019-01-14AE495483.30 ppb
2019-01-14AE495493.20 ppb
2019-01-14AE49547ND
2019-01-14AE495413.40 ppb
2019-04-23AE63373ND
2019-04-23AE633528.80 ppb
2019-04-23AE63377ND
2019-04-23AE633499.10 ppb
2019-07-22AE75251ND
2019-07-22AE75245ND
2019-07-22AE75249ND
2019-07-22AE75247ND
2019-10-03AE856664.90 ppb
2019-10-03AE856614.40 ppb
2019-10-03AE856676.50 ppb
2019-10-03AE856633.90 ppb