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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Lafayette

Trichloroacetic 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)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
2016ND160ND
2017ND160ND
20180.288 ppb164ND - 1.20 ppb
20190.125 ppb162ND - 1.000 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic 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.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-20AI36488ND
2014-03-20AI36487ND
2014-03-20AI36486ND
2014-03-20AI36485ND
2014-06-16AI43323ND
2014-06-16AI43322ND
2014-06-16AI43321ND
2014-06-16AI43320ND
2014-09-16AI54038ND
2014-09-16AI54037ND
2014-09-16AI54039ND
2014-09-16AI54040ND
2014-12-17AI61735ND
2014-12-17AI61734ND
2014-12-17AI61733ND
2014-12-17AI61732ND
2015-03-18AI69329ND
2015-03-18AI69328ND
2015-03-18AI69327ND
2015-03-18AI69326ND
2015-06-16AI79919ND
2015-06-16AI79920ND
2015-06-16AI79922ND
2015-06-16AI79921ND
2015-09-15AI89814ND
2015-09-15AI89813ND
2015-09-15AI89812ND
2015-09-15AI89811ND
2015-12-15AJ02948ND
2015-12-15AJ02947ND
2015-12-15AJ02946ND
2015-12-15AJ02945ND
2016-03-15AJ08201ND
2016-03-15AJ08200ND
2016-03-15AJ08202ND
2016-03-15AJ08203ND
2016-06-14AJ14149ND
2016-06-14AJ14148ND
2016-06-14AJ14147ND
2016-06-14AJ14146ND
2016-09-21AJ28484ND
2016-09-21AJ28483ND
2016-09-21AJ28482ND
2016-09-21AJ28481ND
2016-12-20AJ37244ND
2016-12-20AJ37247ND
2016-12-20AJ37246ND
2016-12-20AJ37245ND
2017-03-20AJ48350ND
2017-03-20AJ48349ND
2017-03-20AJ48348ND
2017-03-20AJ48347ND
2017-06-21AJ58216ND
2017-06-21AJ58215ND
2017-06-21AJ58214ND
2017-06-21AJ58213ND
2017-09-18AJ68295ND
2017-09-18AJ68294ND
2017-09-18AJ68296ND
2017-09-18AJ68297ND
2017-12-18AJ75640ND
2017-12-18AJ75639ND
2017-12-18AJ75638ND
2017-12-18AJ75637ND
2018-03-20AJ862281.10 ppb
2018-03-20AJ86227ND
2018-03-20AJ862261.20 ppb
2018-03-20AJ862251.10 ppb
2018-06-18AJ91845ND
2018-06-18AJ91846ND
2018-06-18AJ91848ND
2018-06-18AJ91847ND
2018-09-18AK013951.20 ppb
2018-09-18AK01394ND
2018-09-18AK01393ND
2018-09-18AK01392ND
2018-12-12AK08052ND
2018-12-12AK08051ND
2018-12-12AK08050ND
2018-12-12AK08049ND
2019-03-20AK136261.000 ppb
2019-03-20AK13625ND
2019-03-20AK13627ND
2019-03-20AK136281.000 ppb
2019-06-18AK20034ND
2019-06-18AK20033ND
2019-06-18AK20032ND
2019-06-18AK20031ND
2019-09-17AK31058ND
2019-09-17AK31057ND
2019-09-17AK31056ND
2019-09-17AK31055ND
2019-12-09AK37785ND
2019-12-09AK37788ND
2019-12-09AK37787ND
2019-12-09AK37786ND