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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Harris County Municipal Utility District 321

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.625 ppb41ND - 2.50 ppb
2015ND40ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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
2014-02-24AC44219ND
2014-04-30AC52497ND
2014-08-14AC63780ND
2014-11-11AC717032.50 ppb
2015-02-12AC80371ND
2015-05-21AC92973ND
2015-09-03AD05574ND
2015-11-20AD14421ND
2016-02-04AD22086ND
2016-04-28AD34613ND
2016-09-13AD49100ND
2016-11-14AD57697ND
2017-01-12AD64691ND
2017-04-12AD79443ND
2017-07-13AD89255ND
2017-10-17AE01035ND
2018-01-11AE08911ND
2018-04-04AE21172ND
2018-07-12AE33097ND
2018-10-09AE42926ND
2019-01-31AE52413ND
2019-04-18AE62961ND
2019-09-25AE84597ND
2019-11-07AE88893ND