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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

City of Bryson

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

22

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.650 ppb21ND - 1.30 ppb
20130.333 ppb31ND - 1.000 ppb
20143.53 ppb43ND - 10.7 ppb
20157.75 ppb441.40 ppb - 11.5 ppb
20166.02 ppb552.60 ppb - 11.4 ppb
20174.90 ppb883.30 ppb - 8.20 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
2012-09-271209B610051.30 ppb
2012-09-271209B61004ND
2013-05-28Q1301572002ND
2013-05-28Q1301572001ND
2013-11-21Q13145110011.000 ppb
2014-03-20Q1409002002ND
2014-06-02Q14188200011.60 ppb
2014-09-08Q144245300110.7 ppb
2014-12-18Q14605740011.80 ppb
2015-03-10Q15089220021.40 ppb
2015-06-18Q152298900111.0 ppb
2015-09-14Q15353930017.10 ppb
2015-12-03Q154804700111.5 ppb
2016-03-07Q16094630015.60 ppb
2016-05-10Q16182370017.40 ppb
2016-09-22Q163946700111.4 ppb
2016-12-05Q16525300023.10 ppb
2016-12-05Q16525300012.60 ppb
2017-03-09Q17102210024.70 ppb
2017-03-09Q17102210033.90 ppb
2017-05-17Q17202930014.20 ppb
2017-05-17Q17202930024.00 ppb
2017-09-05Q17408290023.50 ppb
2017-09-05Q17408290013.30 ppb
2017-11-20Q17594860078.20 ppb
2017-11-20Q17594860067.40 ppb