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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Rocky Branch Water System

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

 

88

Samples

0

Samples exceeding legal limit (MCL)

40

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND160ND
2016ND160ND
20171.60 ppb16161.10 ppb - 2.10 ppb
20181.90 ppb16161.20 ppb - 2.90 ppb
20190.685 ppb168ND - 1.90 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
2014-08-271329575ND
2014-08-271329574ND
2014-08-271329575ND
2014-08-271329574ND
2014-11-261353518ND
2014-11-261353519ND
2014-11-261353519ND
2014-11-261353518ND
2015-03-031376016ND
2015-03-031376017ND
2015-03-031376017ND
2015-03-031376016ND
2015-05-201397731ND
2015-05-201397732ND
2015-05-201397732ND
2015-05-201397731ND
2015-08-261422222ND
2015-08-261422223ND
2015-08-261422223ND
2015-08-261422222ND
2015-11-301447688ND
2015-11-301447689ND
2015-11-301447689ND
2015-11-301447688ND
2016-02-261470598ND
2016-02-261470599ND
2016-02-261470598ND
2016-02-261470599ND
2016-05-251494222ND
2016-05-251494223ND
2016-05-251494222ND
2016-05-251494223ND
2016-08-301520275ND
2016-08-301520276ND
2016-08-301520275ND
2016-08-301520276ND
2016-11-301544435ND
2016-11-301544434ND
2016-11-301544435ND
2016-11-301544434ND
2017-02-07352944630111.40 ppb
2017-02-07352944630101.10 ppb
2017-02-07352944630101.10 ppb
2017-02-07352944630111.40 ppb
2017-05-16353126260091.40 ppb
2017-05-16353126260101.10 ppb
2017-05-16353126260101.10 ppb
2017-05-16353126260091.40 ppb
2017-08-10353298050142.10 ppb
2017-08-10353298050131.60 ppb
2017-08-10353298050142.10 ppb
2017-08-10353298050131.60 ppb
2017-11-27353507580012.10 ppb
2017-11-27353507580022.00 ppb
2017-11-27353507580012.10 ppb
2017-11-27353507580022.00 ppb
2018-02-19353757820012.00 ppb
2018-02-19353757820021.70 ppb
2018-02-19353757820012.00 ppb
2018-02-19353757820021.70 ppb
2018-05-24353945790021.30 ppb
2018-05-24353945790021.30 ppb
2018-05-29353952060011.80 ppb
2018-05-29353952060011.80 ppb
2018-08-14354116210011.20 ppb
2018-08-14354116210021.40 ppb
2018-08-14354116210011.20 ppb
2018-08-14354116210021.40 ppb
2018-11-13354318080012.90 ppb
2018-11-13354318080022.90 ppb
2018-11-13354318080012.90 ppb
2018-11-13354318080022.90 ppb
2019-02-18354493660020.830 ppb
2019-02-18354493660010.850 ppb
2019-02-18354493660010.850 ppb
2019-02-18354493660020.830 ppb
2019-05-13354693250021.90 ppb
2019-05-13354693250021.90 ppb
2019-05-13354693250011.90 ppb
2019-05-13354693250011.90 ppb
2019-08-1435491211002ND
2019-08-1435491211001ND
2019-08-1435491211001ND
2019-08-1435491211002ND
2019-11-1835514071001ND
2019-11-1835514071002ND
2019-11-1835514071001ND
2019-11-1835514071002ND