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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

City of Watauga

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)

43

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.638 ppb169ND - 1.30 ppb
20150.831 ppb1610ND - 1.80 ppb
20160.825 ppb1611ND - 1.70 ppb
20170.944 ppb166ND - 5.50 ppb
20181.90 ppb165ND - 11.8 ppb
20190.231 ppb162ND - 2.40 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
2014-03-12Q1408343004ND
2014-03-12Q1408343003ND
2014-03-12Q1408343002ND
2014-03-12Q1408343001ND
2014-04-16Q14122640061.10 ppb
2014-04-16Q14122640051.10 ppb
2014-04-16Q14122640041.000 ppb
2014-04-16Q1412264003ND
2014-08-06Q14346680021.000 ppb
2014-08-06Q1434668001ND
2014-08-06Q1434668003ND
2014-08-06Q14346680041.000 ppb
2014-10-07Q14515630041.30 ppb
2014-10-07Q14515630031.20 ppb
2014-10-07Q14515630021.20 ppb
2014-10-07Q14515630011.30 ppb
2015-02-05Q1504734006ND
2015-02-05Q1504734005ND
2015-02-05Q1504734004ND
2015-02-05Q1504734003ND
2015-04-15Q1514286001ND
2015-04-15Q15142860021.20 ppb
2015-04-15Q15142860041.30 ppb
2015-04-15Q15142860031.30 ppb
2015-08-13Q1532194004ND
2015-08-13Q15321940031.10 ppb
2015-08-13Q15321940021.10 ppb
2015-08-13Q15321940011.10 ppb
2015-10-06Q15390880041.70 ppb
2015-10-06Q15390880031.80 ppb
2015-10-06Q15390880021.30 ppb
2015-10-06Q15390880011.40 ppb
2016-01-11Q16007540031.000 ppb
2016-01-11Q16007540021.000 ppb
2016-01-11Q16007540041.10 ppb
2016-01-11Q16007540011.10 ppb
2016-04-14Q16149030041.40 ppb
2016-04-14Q16149030031.70 ppb
2016-04-14Q1614903002ND
2016-04-14Q16149030011.50 ppb
2016-08-03Q1632201004ND
2016-08-03Q1632201003ND
2016-08-03Q1632201002ND
2016-08-03Q1632201001ND
2016-10-24Q16454140031.10 ppb
2016-10-24Q16454140021.10 ppb
2016-10-24Q16454140041.10 ppb
2016-10-24Q16454140011.10 ppb
2017-01-09Q1700753006ND
2017-01-09Q1700753003ND
2017-01-09Q1700753005ND
2017-01-09Q1700753002ND
2017-05-02Q17179420041.000 ppb
2017-05-02Q17179420031.000 ppb
2017-05-02Q1717942002ND
2017-05-02Q17179420011.000 ppb
2017-07-18Q17294870021.60 ppb
2017-07-18Q1729487001ND
2017-07-18Q17294870035.00 ppb
2017-07-18Q17294870045.50 ppb
2017-10-10Q1750669004ND
2017-10-10Q1750669003ND
2017-10-10Q1750669002ND
2017-10-10Q1750669001ND
2018-01-04Q1800441008ND
2018-01-04Q18004410071.000 ppb
2018-01-04Q1800441006ND
2018-01-04Q1800441005ND
2018-04-04Q1813842004ND
2018-04-04Q1813842007ND
2018-04-04Q1813842008ND
2018-04-04Q1813842005ND
2018-07-11Q1827288008ND
2018-07-11Q1827288007ND
2018-07-11Q1827288006ND
2018-07-11Q1827288005ND
2018-10-03Q18395090085.00 ppb
2018-10-03Q18395090075.30 ppb
2018-10-03Q183950900611.8 ppb
2018-10-03Q18395090057.30 ppb
2019-02-12Q1906167006ND
2019-02-12Q1906167005ND
2019-02-12Q1906167007ND
2019-02-12Q1906167008ND
2019-04-01Q1912873008ND
2019-04-01Q1912873007ND
2019-04-01Q1912873006ND
2019-04-01Q1912873005ND
2019-07-16Q1945252008ND
2019-07-16Q1945252007ND
2019-07-16Q1945252006ND
2019-07-16Q1945252005ND
2019-10-21Q1973087005ND
2019-10-21Q1973087008ND
2019-10-21Q19730870071.30 ppb
2019-10-21Q19730870062.40 ppb