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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Darbonne Ws South

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

 

68

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND80ND
2017ND180ND
20180.667 ppb188ND - 2.10 ppb
20190.675 ppb168ND - 1.70 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
2014-07-081315653ND
2014-07-081315652ND
2014-07-081315653ND
2014-07-081315652ND
2015-07-071408339ND
2015-07-071408340ND
2015-07-071408340ND
2015-07-071408339ND
2016-08-151516444ND
2016-08-151516445ND
2016-08-151516445ND
2016-08-151516444ND
2016-11-081539765ND
2016-11-081539766ND
2016-11-081539766ND
2016-11-081539765ND
2017-02-0235292874001ND
2017-02-0235292874002ND
2017-02-0235292874002ND
2017-02-0235292874001ND
2017-05-1535312642003ND
2017-05-1535312642004ND
2017-05-1535312642004ND
2017-05-1535312642003ND
2017-08-1035329805006ND
2017-08-1035329805005ND
2017-08-1035329805006ND
2017-08-1035329805005ND
2017-11-1535349183003ND
2017-11-1535349183002ND
2017-11-1535349183001ND
2017-11-1535349183001ND
2017-11-1535349183002ND
2017-11-1535349183003ND
2018-02-2635376597001ND
2018-02-2635376597001ND
2018-03-08353793030012.10 ppb
2018-03-08353793030021.40 ppb
2018-03-08353793030012.10 ppb
2018-03-08353793030021.40 ppb
2018-05-29353952110011.60 ppb
2018-05-29353952110020.900 ppb
2018-05-29353952110011.60 ppb
2018-05-29353952110020.900 ppb
2018-08-1635412062001ND
2018-08-1635412062002ND
2018-08-1635412062001ND
2018-08-1635412062002ND
2018-11-1935432391001ND
2018-11-1935432391002ND
2018-11-1935432391001ND
2018-11-1935432391002ND
2019-02-2535450962002ND
2019-02-2535450962001ND
2019-02-2535450962001ND
2019-02-2535450962002ND
2019-05-20354702230021.70 ppb
2019-05-20354702230021.70 ppb
2019-05-20354702230011.30 ppb
2019-05-20354702230011.30 ppb
2019-08-1935492402002ND
2019-08-19354924020011.10 ppb
2019-08-19354924020011.10 ppb
2019-08-1935492402002ND
2019-11-19355140730011.30 ppb
2019-11-1935514073002ND
2019-11-19355140730011.30 ppb
2019-11-1935514073002ND