Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Monochloroacetic acid

Three Valleys Municipal Water District

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.

 

88

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.290 ppb121ND - 3.48 ppb
20130.0663 ppb161ND - 1.06 ppb
2014ND160ND
2015ND120ND
20161.04 ppb167ND - 3.39 ppb
20170.638 ppb164ND - 5.75 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
2012-06-139469-800-09213.48 ppb
2012-06-139469-801-1029ND
2012-06-139469-802-0936ND
2012-06-139469-803-0950ND
2012-09-119469-801-0000ND
2012-09-119469-803-0000ND
2012-09-119469-802-0000ND
2012-09-179469-800-0851ND
2012-12-129469-801-0000ND
2012-12-129469-803-0000ND
2012-12-129469-800-0000ND
2012-12-129469-802-0000ND
2013-03-059469-802-1045ND
2013-03-059469-801-1020ND
2013-03-059469-800-08451.06 ppb
2013-03-059469-803-0930ND
2013-06-119469-802-0824ND
2013-06-119469-803-0846ND
2013-06-119469-800-0756ND
2013-06-119469-801-0933ND
2013-09-179469-802-0000ND
2013-09-179469-800-0000ND
2013-09-179469-803-0000ND
2013-09-179469-801-0000ND
2013-12-179469-801-0905ND
2013-12-179469-800-0749ND
2013-12-179469-803-0829ND
2013-12-179469-802-0815ND
2014-03-119469-801-0932ND
2014-03-119469-803-0850ND
2014-03-119469-802-0824ND
2014-03-119469-800-0754ND
2014-06-109469-801-0900ND
2014-06-109469-802-0830ND
2014-06-109469-803-0845ND
2014-06-109469-800-0800ND
2014-09-169469-803-0926ND
2014-09-169469-800-0850ND
2014-09-169469-801-0954ND
2014-09-169469-802-0908ND
2014-12-099469-800-0756ND
2014-12-099469-801-0913ND
2014-12-099469-802-0817ND
2014-12-099469-803-0836ND
2015-03-109469-800-0736ND
2015-03-109469-801-0830ND
2015-03-109469-802-0750ND
2015-03-109469-803-0800ND
2015-06-099588-801-0830ND
2015-06-099588-803-0806ND
2015-06-099588-800-0740ND
2015-06-099588-802-0752ND
2015-12-159469-801-0824ND
2015-12-159469-803-0755ND
2015-12-159469-800-0741ND
2015-12-159469-802-0837ND
2016-03-159469-802-07452.78 ppb
2016-03-159469-801-08002.76 ppb
2016-03-159469-800-07302.48 ppb
2016-03-159469-803-08203.39 ppb
2016-06-219469-802-0839ND
2016-06-219469-803-0749ND
2016-06-219469-800-0723ND
2016-06-219469-801-0810ND
2016-09-139469-802-0746ND
2016-09-139469-800-0727ND
2016-09-139469-803-0803ND
2016-09-139469-801-0822ND
2016-12-139469-801-08542.13 ppb
2016-12-139469-800-0748ND
2016-12-139469-803-08141.55 ppb
2016-12-139469-802-08021.61 ppb
2017-03-219469-801-08021.65 ppb
2017-03-219469-803-08481.46 ppb
2017-03-219469-800-09381.35 ppb
2017-03-279469-802-00005.75 ppb
2017-06-219469-801-0832ND
2017-06-219469-802-0745ND
2017-06-219469-803-0807ND
2017-06-219469-800-0732ND
2017-09-129469-803-0801ND
2017-09-129469-800-0733ND
2017-09-129469-801-0820ND
2017-09-129469-802-0751ND
2017-12-219469-800-0738ND
2017-12-219469-801-0815ND
2017-12-219469-802-0815ND
2017-12-219469-803-0748ND