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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Agua SUD

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)

55

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.74 ppb1613ND - 6.40 ppb
20151.31 ppb166ND - 5.00 ppb
20160.550 ppb168ND - 1.30 ppb
20170.569 ppb168ND - 1.20 ppb
20180.831 ppb169ND - 2.10 ppb
20191.01 ppb1611ND - 1.90 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
2014-03-18AC473401.80 ppb
2014-03-18AC47346ND
2014-03-18AC473473.30 ppb
2014-03-18AC473522.30 ppb
2014-05-05AC529912.80 ppb
2014-05-05AC529731.20 ppb
2014-05-05AC529714.80 ppb
2014-05-05AC529904.50 ppb
2014-08-19AC644196.40 ppb
2014-08-19AC644144.70 ppb
2014-08-19AC64428ND
2014-08-19AC644341.80 ppb
2014-10-08AC691683.50 ppb
2014-10-08AC69170ND
2014-10-08AC691673.20 ppb
2014-10-08AC691763.60 ppb
2015-02-05AC794454.30 ppb
2015-02-05AC79444ND
2015-02-05AC794472.80 ppb
2015-02-05AC794435.00 ppb
2015-05-05AC904713.40 ppb
2015-05-05AC904903.40 ppb
2015-05-05AC904752.00 ppb
2015-05-05AC90492ND
2015-09-22AD07985ND
2015-09-22AD07990ND
2015-09-22AD07982ND
2015-09-22AD07988ND
2015-11-04AD12599ND
2015-11-04AD12604ND
2015-11-04AD12607ND
2015-11-04AD12606ND
2016-02-24AD26040ND
2016-02-24AD26037ND
2016-02-24AD260381.000 ppb
2016-02-24AD260391.000 ppb
2016-05-10AD363551.20 ppb
2016-05-10AD36363ND
2016-05-10AD36362ND
2016-05-10AD363531.000 ppb
2016-09-13AD493471.30 ppb
2016-09-13AD49345ND
2016-09-13AD49350ND
2016-09-13AD493521.000 ppb
2016-10-26AD55119ND
2016-10-26AD551311.30 ppb
2016-10-26AD55127ND
2016-10-26AD551231.000 ppb
2017-03-08AD743231.20 ppb
2017-03-08AD74320ND
2017-03-08AD743191.10 ppb
2017-03-08AD74306ND
2017-05-19AD850301.20 ppb
2017-05-19AD85034ND
2017-05-19AD850331.000 ppb
2017-05-19AD850311.20 ppb
2017-08-02AD92130ND
2017-08-02AD92146ND
2017-08-02AD92129ND
2017-08-02AD92142ND
2017-11-08AE043191.20 ppb
2017-11-08AE04318ND
2017-11-08AE043071.10 ppb
2017-11-08AE043211.10 ppb
2018-03-05AE16937ND
2018-03-05AE16931ND
2018-03-05AE169341.10 ppb
2018-03-05AE16913ND
2018-05-14AE26348ND
2018-05-14AE263462.10 ppb
2018-05-14AE263401.60 ppb
2018-05-14AE263552.00 ppb
2018-08-27AE386621.10 ppb
2018-08-27AE38681ND
2018-08-27AE386791.50 ppb
2018-08-27AE386651.70 ppb
2018-12-06AE481791.10 ppb
2018-12-06AE48174ND
2018-12-06AE481841.10 ppb
2018-12-06AE48182ND
2019-01-15AE500941.90 ppb
2019-01-15AE500971.20 ppb
2019-01-15AE50091ND
2019-01-15AE500921.70 ppb
2019-06-13AE705601.80 ppb
2019-06-13AE705671.30 ppb
2019-06-13AE705651.60 ppb
2019-06-13AE705621.50 ppb
2019-09-17AE837861.50 ppb
2019-09-17AE835681.000 ppb
2019-09-17AE835701.30 ppb
2019-09-17AE835691.40 ppb
2019-12-04AE91416ND
2019-12-04AE91414ND
2019-12-04AE91415ND
2019-12-04AE91420ND