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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of South Houston

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
20150.650 ppb164ND - 3.20 ppb
20160.956 ppb164ND - 4.70 ppb
2017ND160ND
2018ND160ND
20193.22 ppb1611ND - 5.40 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
2014-02-14AC43023ND
2014-02-14AC43070ND
2014-02-14AC43068ND
2014-02-14AC43091ND
2014-04-07AC49582ND
2014-04-07AC49615ND
2014-04-07AC49612ND
2014-06-06AC56298ND
2014-08-11AC62929ND
2014-08-11AC62901ND
2014-08-11AC62900ND
2014-08-11AC62902ND
2014-11-24AC72787ND
2014-11-24AC72782ND
2014-11-24AC72720ND
2014-11-24AC72786ND
2015-01-21AC77203ND
2015-01-21AC77209ND
2015-01-21AC77204ND
2015-01-21AC77202ND
2015-06-12AC958993.20 ppb
2015-06-12AC959002.50 ppb
2015-06-12AC959072.10 ppb
2015-06-12AC959272.60 ppb
2015-07-20AD00100ND
2015-07-20AD00105ND
2015-07-20AD00077ND
2015-07-20AD00121ND
2015-10-06AD09581ND
2015-10-06AD09592ND
2015-10-06AD09585ND
2015-10-06AD09590ND
2016-01-14AD18163ND
2016-01-14AD181653.20 ppb
2016-01-14AD181643.00 ppb
2016-01-14AD18162ND
2016-04-08AD32535ND
2016-04-08AD32528ND
2016-04-08AD325464.40 ppb
2016-04-08AD32541ND
2016-07-11AD43555ND
2016-07-11AD43516ND
2016-07-11AD43522ND
2016-07-11AD435154.70 ppb
2016-10-07AD52794ND
2016-10-07AD52795ND
2016-10-07AD52796ND
2016-10-07AD52798ND
2017-01-06AD63562ND
2017-01-06AD63563ND
2017-01-06AD63560ND
2017-01-06AD63561ND
2017-04-07AD78913ND
2017-04-07AD78910ND
2017-04-07AD78911ND
2017-04-07AD78912ND
2017-07-14AD89417ND
2017-07-14AD89414ND
2017-07-14AD89419ND
2017-07-14AD89415ND
2017-10-17AE01071ND
2017-10-17AE01060ND
2017-10-17AE01056ND
2017-10-17AE01059ND
2018-01-30AE11212ND
2018-01-30AE11199ND
2018-01-30AE11200ND
2018-01-30AE11220ND
2018-04-12AE22239ND
2018-04-12AE22240ND
2018-04-12AE22238ND
2018-04-12AE22241ND
2018-08-09AE36279ND
2018-08-09AE36280ND
2018-08-09AE36278ND
2018-08-09AE36285ND
2018-11-20AE46613ND
2018-11-20AE46612ND
2018-11-20AE46614ND
2018-11-20AE46615ND
2019-02-05AE528744.20 ppb
2019-02-05AE528714.50 ppb
2019-02-05AE528723.80 ppb
2019-02-05AE528735.40 ppb
2019-04-19AE63165ND
2019-04-19AE63124ND
2019-04-19AE63167ND
2019-04-19AE63126ND
2019-07-10AE738934.00 ppb
2019-07-10AE738894.50 ppb
2019-07-10AE738925.10 ppb
2019-07-10AE738904.50 ppb
2019-10-02AE854795.30 ppb
2019-10-02AE854605.00 ppb
2019-10-02AE854705.20 ppb
2019-10-02AE85481ND