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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Clwsc Canyon Lake Shores

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)

71

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.956 ppb1610ND - 2.00 ppb
20154.08 ppb16161.000 ppb - 17.7 ppb
20162.07 ppb1612ND - 5.00 ppb
20172.27 ppb1612ND - 5.60 ppb
20181.03 ppb1610ND - 2.30 ppb
20191.04 ppb1611ND - 2.20 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
2014-02-18AC433121.10 ppb
2014-02-18AC43337ND
2014-02-18AC433171.30 ppb
2014-02-18AC433301.20 ppb
2014-04-30AC52483ND
2014-04-30AC52485ND
2014-04-30AC524982.00 ppb
2014-04-30AC52484ND
2014-09-03AC657201.80 ppb
2014-09-03AC657211.50 ppb
2014-09-03AC65723ND
2014-09-03AC657261.50 ppb
2014-10-08AC691731.60 ppb
2014-10-08AC69177ND
2014-10-08AC691741.50 ppb
2014-10-08AC691751.80 ppb
2015-02-03AC790041.000 ppb
2015-02-03AC790061.000 ppb
2015-02-03AC790121.10 ppb
2015-02-03AC790051.20 ppb
2015-05-13AC918181.70 ppb
2015-05-13AC918141.30 ppb
2015-05-13AC918091.80 ppb
2015-05-13AC918061.60 ppb
2015-08-12AD038134.20 ppb
2015-08-12AD038112.10 ppb
2015-08-12AD038064.40 ppb
2015-08-12AD038074.50 ppb
2015-11-03AD123839.50 ppb
2015-11-03AD1238617.7 ppb
2015-11-03AD123857.40 ppb
2015-11-03AD123824.70 ppb
2016-02-03AD217994.80 ppb
2016-02-03AD217685.00 ppb
2016-02-03AD21802ND
2016-02-03AD217693.80 ppb
2016-04-27AD343772.00 ppb
2016-04-27AD343702.00 ppb
2016-04-27AD343731.70 ppb
2016-04-27AD34376ND
2016-07-26AD456713.10 ppb
2016-07-26AD45675ND
2016-07-26AD456782.70 ppb
2016-07-26AD456792.30 ppb
2016-10-04AD52428ND
2016-10-04AD524322.50 ppb
2016-10-04AD524311.10 ppb
2016-10-04AD524272.10 ppb
2017-01-25AD667872.70 ppb
2017-01-25AD667891.20 ppb
2017-01-25AD667862.00 ppb
2017-01-25AD66788ND
2017-04-11AD791763.00 ppb
2017-04-11AD79178ND
2017-04-11AD791772.60 ppb
2017-04-11AD791792.70 ppb
2017-07-24AD903313.40 ppb
2017-07-24AD903002.70 ppb
2017-07-24AD90335ND
2017-07-24AD903304.10 ppb
2017-10-05AD995345.60 ppb
2017-10-05AD995352.70 ppb
2017-10-05AD995363.60 ppb
2017-10-05AD99541ND
2018-02-07AE127171.50 ppb
2018-02-07AE12719ND
2018-02-07AE127131.70 ppb
2018-02-07AE127151.50 ppb
2018-05-16AE26524ND
2018-05-16AE26554ND
2018-05-16AE265301.80 ppb
2018-05-16AE265531.30 ppb
2018-07-26AE346501.60 ppb
2018-07-26AE34651ND
2018-07-26AE346441.50 ppb
2018-07-26AE346451.30 ppb
2018-11-06AE45365ND
2018-11-06AE45364ND
2018-11-06AE453702.30 ppb
2018-11-06AE453692.00 ppb
2019-02-06AE531681.30 ppb
2019-02-06AE53166ND
2019-02-06AE53167ND
2019-02-06AE531691.60 ppb
2019-04-23AE633591.90 ppb
2019-04-23AE633531.30 ppb
2019-04-23AE633602.20 ppb
2019-04-23AE63355ND
2019-08-20AE797981.20 ppb
2019-08-20AE79799ND
2019-08-20AE798001.70 ppb
2019-08-20AE798011.30 ppb
2019-10-29AE878381.40 ppb
2019-10-29AE878491.60 ppb
2019-10-29AE87847ND
2019-10-29AE878391.20 ppb