Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Monochloroacetic acid

Clwsc Canyon Lake Shores

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
2014ND160ND
20150.125 ppb161ND - 2.00 ppb
20160.144 ppb161ND - 2.30 ppb
20170.163 ppb161ND - 2.60 ppb
20180.175 ppb161ND - 2.80 ppb
20190.519 ppb163ND - 3.00 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
2014-02-18AC43312ND
2014-02-18AC43337ND
2014-02-18AC43317ND
2014-02-18AC43330ND
2014-04-30AC52483ND
2014-04-30AC52485ND
2014-04-30AC52498ND
2014-04-30AC52484ND
2014-09-03AC65720ND
2014-09-03AC65721ND
2014-09-03AC65723ND
2014-09-03AC65726ND
2014-10-08AC69173ND
2014-10-08AC69177ND
2014-10-08AC69174ND
2014-10-08AC69175ND
2015-02-03AC79004ND
2015-02-03AC79006ND
2015-02-03AC79012ND
2015-02-03AC790052.00 ppb
2015-05-13AC91818ND
2015-05-13AC91814ND
2015-05-13AC91809ND
2015-05-13AC91806ND
2015-08-12AD03813ND
2015-08-12AD03811ND
2015-08-12AD03806ND
2015-08-12AD03807ND
2015-11-03AD12383ND
2015-11-03AD12386ND
2015-11-03AD12385ND
2015-11-03AD12382ND
2016-02-03AD21799ND
2016-02-03AD21768ND
2016-02-03AD21802ND
2016-02-03AD21769ND
2016-04-27AD34377ND
2016-04-27AD34370ND
2016-04-27AD34373ND
2016-04-27AD34376ND
2016-07-26AD456712.30 ppb
2016-07-26AD45675ND
2016-07-26AD45678ND
2016-07-26AD45679ND
2016-10-04AD52428ND
2016-10-04AD52432ND
2016-10-04AD52431ND
2016-10-04AD52427ND
2017-01-25AD66787ND
2017-01-25AD66789ND
2017-01-25AD66786ND
2017-01-25AD66788ND
2017-04-11AD79176ND
2017-04-11AD79178ND
2017-04-11AD79177ND
2017-04-11AD79179ND
2017-07-24AD90331ND
2017-07-24AD903002.60 ppb
2017-07-24AD90335ND
2017-07-24AD90330ND
2017-10-05AD99534ND
2017-10-05AD99535ND
2017-10-05AD99536ND
2017-10-05AD99541ND
2018-02-07AE12717ND
2018-02-07AE12719ND
2018-02-07AE12713ND
2018-02-07AE12715ND
2018-05-16AE26524ND
2018-05-16AE26554ND
2018-05-16AE26530ND
2018-05-16AE26553ND
2018-07-26AE34650ND
2018-07-26AE34651ND
2018-07-26AE346442.80 ppb
2018-07-26AE34645ND
2018-11-06AE45365ND
2018-11-06AE45364ND
2018-11-06AE45370ND
2018-11-06AE45369ND
2019-02-06AE53168ND
2019-02-06AE53166ND
2019-02-06AE53167ND
2019-02-06AE53169ND
2019-04-23AE63359ND
2019-04-23AE63353ND
2019-04-23AE63360ND
2019-04-23AE63355ND
2019-08-20AE79798ND
2019-08-20AE79799ND
2019-08-20AE79800ND
2019-08-20AE79801ND
2019-10-29AE878383.00 ppb
2019-10-29AE878492.60 ppb
2019-10-29AE87847ND
2019-10-29AE878392.70 ppb