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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Harris County WCID 36

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
20152.21 ppb1610ND - 5.30 ppb
20160.450 ppb162ND - 3.70 ppb
2017ND160ND
20180.594 ppb163ND - 4.00 ppb
20191.86 ppb167ND - 7.40 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
2014-03-19AC47714ND
2014-03-19AC47713ND
2014-03-19AC47724ND
2014-03-19AC47715ND
2014-05-01AC52674ND
2014-05-01AC52677ND
2014-05-01AC52671ND
2014-05-01AC52670ND
2014-07-21AC60384ND
2014-07-21AC60381ND
2014-07-21AC60366ND
2014-07-21AC60367ND
2014-11-07AC71669ND
2014-11-07AC71691ND
2014-11-07AC71671ND
2014-11-07AC71744ND
2015-01-27AC77910ND
2015-01-27AC77897ND
2015-01-27AC77908ND
2015-01-27AC77909ND
2015-04-17AC887882.60 ppb
2015-04-17AC88772ND
2015-04-17AC887863.50 ppb
2015-04-17AC887912.70 ppb
2015-09-08AD058193.90 ppb
2015-09-08AD058124.20 ppb
2015-09-08AD058204.00 ppb
2015-09-08AD058135.30 ppb
2015-12-04AD157142.30 ppb
2015-12-04AD15650ND
2015-12-04AD156613.30 ppb
2015-12-04AD156573.50 ppb
2016-02-03AD21792ND
2016-02-03AD21780ND
2016-02-03AD21779ND
2016-02-03AD21781ND
2016-04-22AD33928ND
2016-04-22AD339303.70 ppb
2016-04-22AD33934ND
2016-04-22AD339353.50 ppb
2016-09-20AD50317ND
2016-09-20AD50313ND
2016-09-20AD50307ND
2016-09-20AD50319ND
2016-11-16AD58297ND
2016-11-16AD58296ND
2016-11-16AD58295ND
2016-11-16AD58294ND
2017-02-14AD70814ND
2017-02-14AD70816ND
2017-02-14AD70820ND
2017-02-14AD70821ND
2017-04-24AD80657ND
2017-04-24AD80675ND
2017-04-24AD80635ND
2017-04-24AD80634ND
2017-07-28AD91321ND
2017-07-28AD91317ND
2017-07-28AD91320ND
2017-07-28AD91326ND
2017-11-09AE04287ND
2017-11-09AE04292ND
2017-11-09AE04290ND
2017-11-09AE04293ND
2018-01-26AE10920ND
2018-01-26AE10921ND
2018-01-26AE10919ND
2018-01-26AE10918ND
2018-04-16AE22465ND
2018-04-16AE224973.50 ppb
2018-04-16AE224594.00 ppb
2018-04-16AE224642.00 ppb
2018-07-31AE35039ND
2018-07-31AE35041ND
2018-07-31AE35040ND
2018-07-31AE35038ND
2018-10-29AE44713ND
2018-10-29AE44714ND
2018-10-29AE44715ND
2018-10-29AE44716ND
2019-02-05AE529014.00 ppb
2019-02-05AE528883.10 ppb
2019-02-05AE528874.00 ppb
2019-02-05AE528863.60 ppb
2019-05-23AE67919ND
2019-05-23AE679167.40 ppb
2019-05-23AE679172.20 ppb
2019-05-23AE678975.40 ppb
2019-08-23AE80528ND
2019-08-23AE80527ND
2019-08-23AE80561ND
2019-08-23AE80563ND
2019-11-15AE89497ND
2019-11-15AE89511ND
2019-11-15AE89496ND
2019-11-15AE89512ND