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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Sharyland Water Supply Corporation

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)

39

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.300 ppb164ND - 1.40 ppb
20150.138 ppb162ND - 1.10 ppb
20160.263 ppb164ND - 1.10 ppb
20170.581 ppb166ND - 2.00 ppb
20181.11 ppb1612ND - 2.60 ppb
20191.15 ppb1611ND - 3.40 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
2014-03-18AC47345ND
2014-03-18AC47344ND
2014-03-18AC47343ND
2014-03-18AC47342ND
2014-05-05AC529701.000 ppb
2014-05-05AC52975ND
2014-05-05AC52976ND
2014-05-05AC52972ND
2014-08-19AC64433ND
2014-08-19AC644201.30 ppb
2014-08-19AC644291.10 ppb
2014-08-19AC644181.40 ppb
2014-10-10AC69498ND
2014-10-10AC69481ND
2014-10-10AC69480ND
2014-10-10AC69496ND
2015-02-05AC79448ND
2015-02-05AC79449ND
2015-02-05AC79446ND
2015-02-05AC79442ND
2015-05-05AC90493ND
2015-05-05AC90485ND
2015-05-05AC904971.10 ppb
2015-05-05AC90470ND
2015-08-03AD02000ND
2015-08-03AD020531.10 ppb
2015-08-03AD02003ND
2015-08-03AD01999ND
2015-11-04AD12592ND
2015-11-04AD12603ND
2015-11-04AD12611ND
2015-11-04AD12580ND
2016-02-03AD21775ND
2016-02-03AD21771ND
2016-02-03AD21773ND
2016-02-03AD217701.000 ppb
2016-05-11AD363091.10 ppb
2016-05-11AD363081.000 ppb
2016-05-11AD36302ND
2016-06-06AD39377ND
2016-09-14AD49378ND
2016-09-14AD49379ND
2016-09-14AD49383ND
2016-09-14AD49382ND
2016-10-26AD55128ND
2016-10-26AD551211.10 ppb
2016-10-26AD55120ND
2016-10-26AD55130ND
2017-03-09AD74633ND
2017-03-09AD74641ND
2017-03-10AD74645ND
2017-03-10AD74642ND
2017-04-25AD81491ND
2017-04-25AD81486ND
2017-04-25AD814831.000 ppb
2017-04-25AD814901.20 ppb
2017-08-02AD92143ND
2017-08-02AD92135ND
2017-08-02AD92144ND
2017-08-02AD92140ND
2017-11-10AE044891.80 ppb
2017-11-10AE044901.90 ppb
2017-11-10AE044931.40 ppb
2017-11-10AE044912.00 ppb
2018-03-07AE175301.70 ppb
2018-03-07AE175311.10 ppb
2018-03-07AE175321.50 ppb
2018-03-07AE175331.50 ppb
2018-05-16AE267401.10 ppb
2018-05-16AE267341.70 ppb
2018-05-16AE267372.60 ppb
2018-05-16AE267431.70 ppb
2018-08-28AE386581.30 ppb
2018-08-28AE386561.20 ppb
2018-08-28AE38657ND
2018-08-28AE386551.000 ppb
2018-12-05AE48173ND
2018-12-05AE481781.30 ppb
2018-12-05AE48176ND
2018-12-05AE48180ND
2019-01-16AE500831.20 ppb
2019-01-16AE50079ND
2019-01-16AE500812.50 ppb
2019-01-16AE500963.40 ppb
2019-06-24AE716691.40 ppb
2019-06-24AE716731.10 ppb
2019-06-24AE716701.10 ppb
2019-06-24AE71671ND
2019-09-18AE839552.20 ppb
2019-09-18AE839541.30 ppb
2019-09-18AE839581.90 ppb
2019-09-18AE839561.30 ppb
2019-12-05AE914261.000 ppb
2019-12-05AE91422ND
2019-12-05AE91423ND
2019-12-05AE91424ND