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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

East Rio Hondo WSC

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.

 

93

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.662 ppb132ND - 6.60 ppb
2013ND160ND
2014ND160ND
20150.250 ppb161ND - 4.00 ppb
2016ND160ND
2017ND160ND

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
2012-01-101201193005ND
2012-05-301205875008ND
2012-05-3012058750076.60 ppb
2012-05-301205875006ND
2012-05-3012058750052.00 ppb
2012-07-171207591014ND
2012-07-171207591013ND
2012-07-171207591012ND
2012-07-171207591011ND
2012-10-181210655006ND
2012-10-181210655005ND
2012-10-181210655007ND
2012-10-181210655008ND
2013-01-17AC08239ND
2013-01-17AC08240ND
2013-01-17AC08237ND
2013-01-17AC08238ND
2013-04-05AC15963ND
2013-04-05AC15967ND
2013-04-05AC15966ND
2013-04-05AC15961ND
2013-09-10AC29669ND
2013-09-10AC29666ND
2013-09-10AC29668ND
2013-09-10AC29664ND
2013-10-21AC32707ND
2013-10-21AC32676ND
2013-10-21AC32678ND
2013-10-21AC32677ND
2014-03-06AC45933ND
2014-03-06AC45939ND
2014-03-06AC45971ND
2014-03-06AC45935ND
2014-06-06AC56282ND
2014-06-06AC56285ND
2014-06-06AC56312ND
2014-06-06AC56313ND
2014-09-09AC66413ND
2014-09-09AC66372ND
2014-09-09AC66412ND
2014-09-09AC66373ND
2014-11-20AC72661ND
2014-11-20AC72644ND
2014-11-20AC72642ND
2014-11-20AC72650ND
2015-03-18AC84970ND
2015-03-18AC84981ND
2015-03-18AC84973ND
2015-03-18AC84977ND
2015-06-17AC96247ND
2015-06-17AC96249ND
2015-06-17AC96275ND
2015-06-17AC96248ND
2015-09-23AD08187ND
2015-09-23AD082024.00 ppb
2015-09-23AD08184ND
2015-09-23AD08188ND
2015-12-01AD14856ND
2015-12-01AD14855ND
2015-12-01AD14906ND
2015-12-01AD14859ND
2016-02-25AD25678ND
2016-02-25AD25699ND
2016-02-25AD25704ND
2016-02-25AD25679ND
2016-05-17AD36989ND
2016-05-17AD36990ND
2016-05-17AD36987ND
2016-05-17AD36988ND
2016-09-27AD51483ND
2016-09-27AD51484ND
2016-09-27AD51437ND
2016-09-27AD51454ND
2016-12-09AD61623ND
2016-12-09AD61622ND
2016-12-09AD61624ND
2016-12-09AD61621ND
2017-03-03AD73410ND
2017-03-03AD73409ND
2017-03-03AD73408ND
2017-03-03AD73407ND
2017-05-19AD85032ND
2017-05-19AD85029ND
2017-05-19AD85035ND
2017-05-19AD85036ND
2017-09-07AD95104ND
2017-09-07AD95099ND
2017-09-07AD95103ND
2017-09-07AD95115ND
2017-11-30AE06330ND
2017-11-30AE06326ND
2017-11-30AE06329ND
2017-11-30AE06322ND