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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

City of Forest Hill

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)

40

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.14 ppb1613ND - 2.30 ppb
20150.606 ppb166ND - 1.80 ppb
20160.931 ppb1613ND - 1.30 ppb
20170.0750 ppb161ND - 1.20 ppb
20180.0688 ppb161ND - 1.10 ppb
20190.406 ppb166ND - 1.20 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
2014-03-10Q14076850051.20 ppb
2014-03-10Q14076850041.30 ppb
2014-03-10Q14076850031.10 ppb
2014-03-10Q1407685002ND
2014-05-22Q14177070041.20 ppb
2014-05-22Q14177070031.10 ppb
2014-05-22Q14177070021.20 ppb
2014-05-22Q14177070011.10 ppb
2014-08-04Q14336580022.30 ppb
2014-08-04Q14336580011.80 ppb
2014-08-04Q14336580031.60 ppb
2014-08-04Q14336580041.90 ppb
2014-10-20Q14532340041.30 ppb
2014-10-20Q1453234003ND
2014-10-20Q1453234002ND
2014-10-20Q14532340011.10 ppb
2015-01-29Q1503649004ND
2015-01-29Q1503649003ND
2015-01-29Q1503649002ND
2015-01-29Q1503649001ND
2015-04-07Q15126900041.40 ppb
2015-04-07Q1512690001ND
2015-04-07Q1512690003ND
2015-04-07Q15126900021.40 ppb
2015-08-06Q1530906004ND
2015-08-06Q1530906003ND
2015-08-06Q1530906002ND
2015-08-06Q1530906001ND
2015-10-07Q15394790041.70 ppb
2015-10-07Q15394790031.80 ppb
2015-10-07Q15394790021.70 ppb
2015-10-07Q15394790011.70 ppb
2016-01-12Q1601019002ND
2016-01-12Q16010190011.000 ppb
2016-01-12Q1601019003ND
2016-01-12Q16010190041.10 ppb
2016-04-12Q16146860041.10 ppb
2016-04-12Q16146860031.20 ppb
2016-04-12Q16146860021.30 ppb
2016-04-12Q16146860011.30 ppb
2016-07-12Q16280720041.000 ppb
2016-07-12Q16280720031.000 ppb
2016-07-12Q16280720021.000 ppb
2016-07-12Q1628072001ND
2016-10-24Q16454090031.30 ppb
2016-10-24Q16454090021.20 ppb
2016-10-24Q16454090041.10 ppb
2016-10-24Q16454090011.30 ppb
2017-01-17Q1701918005ND
2017-01-17Q1701918002ND
2017-01-17Q1701918004ND
2017-01-17Q1701918001ND
2017-04-27Q1717346004ND
2017-04-27Q1717346003ND
2017-04-27Q1717346002ND
2017-04-27Q1717346001ND
2017-07-05Q1727263001ND
2017-07-05Q1727263003ND
2017-07-05Q1727263004ND
2017-07-05Q1727263002ND
2017-10-03Q17482290041.20 ppb
2017-10-03Q1748229003ND
2017-10-03Q1748229002ND
2017-10-03Q1748229001ND
2018-01-09Q1800778005ND
2018-01-09Q1800778004ND
2018-01-09Q1800778003ND
2018-01-09Q1800778002ND
2018-04-02Q1813204003ND
2018-04-02Q1813204001ND
2018-04-02Q1813204004ND
2018-04-02Q1813204002ND
2018-07-12Q1827621004ND
2018-07-12Q1827621002ND
2018-07-12Q1827621001ND
2018-07-12Q1827621003ND
2018-10-15Q1841061004ND
2018-10-15Q18410610031.10 ppb
2018-10-15Q1841061002ND
2018-10-15Q1841061001ND
2019-01-28Q19038150031.000 ppb
2019-01-28Q1903815002ND
2019-01-28Q19038150041.10 ppb
2019-01-28Q19038150051.000 ppb
2019-05-21Q1927194004ND
2019-05-21Q19271940031.20 ppb
2019-05-21Q19271940021.10 ppb
2019-05-21Q19271940011.10 ppb
2019-08-19Q1956455004ND
2019-08-19Q1956455003ND
2019-08-19Q1956455002ND
2019-08-19Q1956455001ND
2019-10-17Q1972977001ND
2019-10-17Q1972977004ND
2019-10-17Q1972977003ND
2019-10-17Q1972977002ND