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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Barton Creek Water Supply Corporation

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
20150.800 ppb41ND - 3.20 ppb
20160.575 ppb41ND - 2.30 ppb
2017ND40ND
2018ND40ND
20191.53 ppb41ND - 6.10 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
2014-03-17AC47124ND
2014-06-25AC58089ND
2014-08-28AC65368ND
2014-11-18AC72372ND
2015-03-12AC84051ND
2015-05-21AC93003ND
2015-09-16AD073143.20 ppb
2015-11-20AD14311ND
2016-02-19AD24538ND
2016-06-15AD40738ND
2016-09-07AD48151ND
2016-10-31AD554642.30 ppb
2017-01-30AD67488ND
2017-05-02AD82137ND
2017-08-10AD92736ND
2017-10-30AE02649ND
2018-02-15AE14046ND
2018-05-14AE26103ND
2018-08-13AE36616ND
2018-11-19AE46412ND
2019-02-14AE54559ND
2019-05-28AE682146.10 ppb
2019-08-20AE79544ND
2019-11-25AE90371ND