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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Manville WSC

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)

49

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.14 ppb167ND - 6.20 ppb
20150.413 ppb162ND - 5.20 ppb
20161.24 ppb166ND - 7.90 ppb
20171.89 ppb169ND - 8.90 ppb
20182.61 ppb169ND - 13.0 ppb
20192.66 ppb16161.000 ppb - 4.50 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
2014-03-11AC46464ND
2014-03-11AC46461ND
2014-03-11AC46463ND
2014-03-11AC46462ND
2014-06-18AC57356ND
2014-06-18AC573592.30 ppb
2014-06-18AC573576.20 ppb
2014-06-18AC573582.80 ppb
2014-09-12AC66804ND
2014-09-12AC66802ND
2014-09-12AC66805ND
2014-09-12AC66803ND
2014-11-24AC727722.10 ppb
2014-11-24AC727711.70 ppb
2014-11-24AC727752.20 ppb
2014-11-24AC727411.000 ppb
2015-03-19AC85267ND
2015-03-19AC85263ND
2015-03-19AC85285ND
2015-03-19AC85265ND
2015-05-26AC93256ND
2015-05-26AC93261ND
2015-05-26AC93257ND
2015-05-26AC93254ND
2015-08-17AD04258ND
2015-08-17AD04265ND
2015-08-17AD04262ND
2015-08-17AD042611.40 ppb
2015-11-18AD13995ND
2015-11-18AD13994ND
2015-11-18AD139915.20 ppb
2015-11-18AD13997ND
2016-02-08AD22399ND
2016-02-08AD22419ND
2016-02-08AD22420ND
2016-02-08AD22418ND
2016-04-25AD33944ND
2016-04-25AD33945ND
2016-04-25AD33949ND
2016-04-25AD33948ND
2016-07-25AD454162.10 ppb
2016-07-25AD454202.10 ppb
2016-07-25AD45411ND
2016-07-25AD454141.000 ppb
2016-11-09AD573684.90 ppb
2016-11-09AD573641.80 ppb
2016-11-09AD57355ND
2016-11-09AD573677.90 ppb
2017-01-23AD660321.70 ppb
2017-01-23AD660351.50 ppb
2017-01-23AD660331.50 ppb
2017-01-23AD660312.50 ppb
2017-04-27AD815021.10 ppb
2017-04-27AD81500ND
2017-04-27AD81498ND
2017-04-27AD815011.000 ppb
2017-08-17AD93390ND
2017-08-17AD93386ND
2017-08-17AD93388ND
2017-08-17AD93389ND
2017-10-27AE02406ND
2017-10-27AE024043.40 ppb
2017-10-27AE024058.90 ppb
2017-10-27AE023988.60 ppb
2018-02-01AE11825ND
2018-02-01AE11823ND
2018-02-01AE11824ND
2018-02-01AE118261.10 ppb
2018-04-04AE211851.20 ppb
2018-04-04AE211881.20 ppb
2018-04-04AE211951.50 ppb
2018-04-04AE211871.30 ppb
2018-08-27AE38746ND
2018-09-24AE41266ND
2018-09-24AE41271ND
2018-09-24AE41269ND
2018-11-09AE457359.30 ppb
2018-11-09AE4573413.0 ppb
2018-11-27AE469844.90 ppb
2018-11-27AE469908.30 ppb
2019-02-06AE531172.40 ppb
2019-02-06AE531182.90 ppb
2019-02-06AE531192.00 ppb
2019-02-06AE531161.70 ppb
2019-06-06AE694192.10 ppb
2019-06-06AE694181.80 ppb
2019-06-06AE694221.20 ppb
2019-06-06AE694201.000 ppb
2019-09-12AE831873.10 ppb
2019-09-12AE831893.20 ppb
2019-09-12AE831884.50 ppb
2019-09-12AE831902.30 ppb
2019-12-03AE909852.80 ppb
2019-12-03AE909833.50 ppb
2019-12-03AE909823.90 ppb
2019-12-03AE909864.20 ppb