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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Wells Branch MUD 1

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
20150.256 ppb162ND - 2.10 ppb
20160.363 ppb162ND - 3.20 ppb
2017ND160ND
2018ND160ND
20190.788 ppb165ND - 3.30 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
2014-03-13AC46945ND
2014-03-13AC46944ND
2014-03-13AC46938ND
2014-03-13AC46925ND
2014-06-17AC57153ND
2014-06-17AC57154ND
2014-06-17AC57155ND
2014-06-17AC57150ND
2014-08-26AC65237ND
2014-08-26AC65239ND
2014-08-26AC65250ND
2014-08-26AC65236ND
2014-11-19AC72426ND
2014-11-19AC72428ND
2014-11-19AC72430ND
2014-11-19AC72427ND
2015-03-18AC84989ND
2015-03-18AC84988ND
2015-03-18AC84987ND
2015-03-18AC84985ND
2015-05-20AC92793ND
2015-05-20AC92796ND
2015-05-20AC92790ND
2015-05-20AC92800ND
2015-09-21AD077762.10 ppb
2015-09-21AD077772.00 ppb
2015-09-21AD07783ND
2015-09-21AD07775ND
2015-11-04AD12563ND
2015-11-04AD12622ND
2015-11-04AD12564ND
2015-11-04AD12562ND
2016-02-09AD22729ND
2016-02-09AD22728ND
2016-02-09AD22733ND
2016-02-09AD22731ND
2016-06-22AD41500ND
2016-06-22AD41489ND
2016-06-22AD415042.60 ppb
2016-06-22AD41492ND
2016-09-13AD49161ND
2016-09-13AD491473.20 ppb
2016-09-13AD49146ND
2016-09-13AD49159ND
2016-11-29AD59355ND
2016-11-29AD59357ND
2016-11-29AD59356ND
2016-11-29AD59359ND
2017-03-20AD75693ND
2017-03-20AD75692ND
2017-03-20AD75691ND
2017-03-20AD75690ND
2017-05-04AD82700ND
2017-05-04AD82720ND
2017-05-04AD82714ND
2017-05-04AD82701ND
2017-07-19AD89914ND
2017-07-19AD89917ND
2017-07-19AD89920ND
2017-07-19AD89918ND
2017-11-28AE05904ND
2017-11-28AE05899ND
2017-11-28AE05902ND
2017-11-28AE05900ND
2018-02-21AE14696ND
2018-02-21AE14689ND
2018-02-21AE14695ND
2018-02-21AE14690ND
2018-04-17AE22750ND
2018-04-17AE22746ND
2018-04-17AE22751ND
2018-04-17AE22745ND
2018-07-19AE33908ND
2018-07-19AE33901ND
2018-07-19AE33903ND
2018-07-19AE33907ND
2018-10-10AE43030ND
2018-10-10AE43026ND
2018-10-10AE43031ND
2018-10-10AE43025ND
2019-01-29AE51925ND
2019-01-29AE51897ND
2019-01-29AE51922ND
2019-01-29AE51924ND
2019-04-18AE62937ND
2019-04-18AE62932ND
2019-04-18AE629402.20 ppb
2019-04-18AE62933ND
2019-07-11AE74065ND
2019-07-11AE74060ND
2019-07-11AE74059ND
2019-07-11AE74058ND
2019-10-15AE865873.30 ppb
2019-10-15AE865852.30 ppb
2019-10-15AE865802.40 ppb
2019-10-15AE865842.40 ppb