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EWG's Tap Water Database — 2021 UPDATE

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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.

MORE ABOUT THIS CONTAMINANT

 

92

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND120ND
20161.04 ppb167ND - 3.39 ppb
20170.638 ppb164ND - 5.75 ppb
20181.19 ppb165ND - 8.36 ppb
20190.580 ppb163ND - 3.90 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
2014-03-119469-802-0824ND
2014-03-119469-800-0754ND
2014-03-119469-801-0932ND
2014-03-119469-803-0850ND
2014-06-109469-803-0845ND
2014-06-109469-802-0830ND
2014-06-109469-801-0900ND
2014-06-109469-800-0800ND
2014-09-169469-803-0926ND
2014-09-169469-802-0908ND
2014-09-169469-801-0954ND
2014-09-169469-800-0850ND
2014-12-099469-802-0817ND
2014-12-099469-801-0913ND
2014-12-099469-803-0836ND
2014-12-099469-800-0756ND
2015-03-109469-801-0830ND
2015-03-109469-802-0750ND
2015-03-109469-803-0800ND
2015-03-109469-800-0736ND
2015-06-099588-803-0806ND
2015-06-099588-802-0752ND
2015-06-099588-800-0740ND
2015-06-099588-801-0830ND
2015-12-159469-800-0741ND
2015-12-159469-803-0755ND
2015-12-159469-802-0837ND
2015-12-159469-801-0824ND
2016-03-159469-800-07302.48 ppb
2016-03-159469-803-08203.39 ppb
2016-03-159469-802-07452.78 ppb
2016-03-159469-801-08002.76 ppb
2016-06-219469-801-0810ND
2016-06-219469-800-0723ND
2016-06-219469-803-0749ND
2016-06-219469-802-0839ND
2016-09-139469-800-0727ND
2016-09-139469-801-0822ND
2016-09-139469-803-0803ND
2016-09-139469-802-0746ND
2016-12-139469-801-08542.13 ppb
2016-12-139469-803-08141.55 ppb
2016-12-139469-802-08021.61 ppb
2016-12-139469-800-0748ND
2017-03-219469-800-09381.35 ppb
2017-03-219469-803-08481.46 ppb
2017-03-219469-801-08021.65 ppb
2017-03-279469-802-00005.75 ppb
2017-06-219469-800-0732ND
2017-06-219469-802-0745ND
2017-06-219469-803-0807ND
2017-06-219469-801-0832ND
2017-09-129469-800-0733ND
2017-09-129469-803-0801ND
2017-09-129469-801-0820ND
2017-09-129469-802-0751ND
2017-12-219469-800-0738ND
2017-12-219469-801-0815ND
2017-12-219469-803-0748ND
2017-12-219469-802-0815ND
2018-03-209469-801-0845ND
2018-03-209469-803-0751ND
2018-03-209469-802-0741ND
2018-03-209469-800-0730ND
2018-06-129469-802-0844ND
2018-06-129469-800-08208.36 ppb
2018-06-129469-801-09272.51 ppb
2018-06-129469-803-0906ND
2018-09-119469-802-1023ND
2018-09-119469-801-1003ND
2018-09-119469-803-0945ND
2018-09-119469-800-0934ND
2018-12-209469-800-08092.44 ppb
2018-12-209469-801-08302.20 ppb
2018-12-209469-803-08153.46 ppb
2018-12-209469-802-0751ND
2019-03-199469-801-0840ND
2019-03-199469-800-0915ND
2019-03-199469-803-0845ND
2019-03-199469-802-0900ND
2019-06-189469-803-08233.90 ppb
2019-06-189469-801-0759ND
2019-06-189469-800-07383.04 ppb
2019-06-189469-802-0811ND
2019-09-179469-802-0807ND
2019-09-179469-801-08452.34 ppb
2019-09-179469-800-0753ND
2019-09-179469-803-0822ND
2019-12-179469-803-0849ND
2019-12-179469-801-0934ND
2019-12-179469-800-0746ND
2019-12-179469-802-0826ND