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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

City of Rockport

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)

53

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.925 ppb1610ND - 2.00 ppb
20150.919 ppb169ND - 2.10 ppb
20160.781 ppb169ND - 1.70 ppb
20171.38 ppb1613ND - 2.30 ppb
20181.07 ppb168ND - 2.90 ppb
20190.513 ppb164ND - 2.30 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
2014-02-26AC447501.60 ppb
2014-02-26AC447481.60 ppb
2014-02-26AC447511.30 ppb
2014-02-26AC447491.70 ppb
2014-06-18AC573692.00 ppb
2014-06-18AC573401.70 ppb
2014-06-18AC573351.40 ppb
2014-06-18AC573361.40 ppb
2014-09-08AC66117ND
2014-09-08AC66123ND
2014-09-08AC661391.000 ppb
2014-09-08AC661381.10 ppb
2014-11-20AC72681ND
2014-11-20AC72643ND
2014-11-20AC72680ND
2014-11-20AC72649ND
2015-02-18AC81160ND
2015-02-18AC81147ND
2015-02-18AC811591.000 ppb
2015-03-23AC85468ND
2015-06-02AC942652.00 ppb
2015-06-02AC943022.10 ppb
2015-06-02AC943011.80 ppb
2015-06-02AC942711.80 ppb
2015-09-08AD058261.20 ppb
2015-09-08AD058391.70 ppb
2015-09-08AD058401.70 ppb
2015-09-08AD058271.40 ppb
2015-12-03AD15384ND
2015-12-03AD15381ND
2015-12-03AD15378ND
2015-12-03AD15385ND
2016-01-28AD20669ND
2016-01-28AD20666ND
2016-01-28AD20670ND
2016-01-28AD20672ND
2016-04-18AD333271.70 ppb
2016-04-18AD333261.70 ppb
2016-04-18AD333231.70 ppb
2016-04-18AD333381.40 ppb
2016-09-19AD50073ND
2016-09-19AD50066ND
2016-09-19AD500811.000 ppb
2016-09-19AD50074ND
2016-10-18AD535251.30 ppb
2016-10-18AD535281.10 ppb
2016-10-18AD535271.30 ppb
2016-10-18AD535261.30 ppb
2017-01-04AD631861.50 ppb
2017-01-04AD631781.70 ppb
2017-01-04AD631802.20 ppb
2017-01-04AD631812.00 ppb
2017-04-03AD780251.50 ppb
2017-04-03AD780242.30 ppb
2017-04-03AD780211.60 ppb
2017-04-03AD780231.60 ppb
2017-07-13AD892101.10 ppb
2017-07-13AD89219ND
2017-07-13AD89223ND
2017-07-13AD89222ND
2017-12-06AE069611.80 ppb
2017-12-06AE069511.40 ppb
2017-12-06AE069501.50 ppb
2017-12-06AE069651.80 ppb
2018-02-12AE135451.70 ppb
2018-02-12AE135441.80 ppb
2018-02-12AE135431.60 ppb
2018-02-12AE135482.00 ppb
2018-06-05AE28838ND
2018-06-05AE28832ND
2018-06-05AE28837ND
2018-06-05AE28833ND
2018-08-29AE38943ND
2018-08-29AE38950ND
2018-08-29AE38949ND
2018-08-29AE38948ND
2018-11-13AE460662.40 ppb
2018-11-13AE460692.90 ppb
2018-11-13AE460782.60 ppb
2018-11-13AE460792.10 ppb
2019-02-27AE565302.30 ppb
2019-02-27AE565211.70 ppb
2019-02-27AE565292.30 ppb
2019-02-27AE565281.90 ppb
2019-06-12AE70340ND
2019-06-12AE70339ND
2019-06-12AE70338ND
2019-06-12AE70341ND
2019-08-14AE78904ND
2019-08-14AE78902ND
2019-08-14AE78906ND
2019-08-14AE78905ND
2019-11-06AE88883ND
2019-11-06AE88885ND
2019-11-06AE88884ND
2019-11-06AE88882ND