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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Dover Water Commission

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)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0731 ppb161ND - 1.17 ppb
20150.0731 ppb161ND - 1.17 ppb
2016ND160ND
20170.0625 ppb161ND - 1.000 ppb
20180.0956 ppb161ND - 1.53 ppb
2019ND160ND

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
2014-01-1514011720-001ND
2014-01-1514011720-002ND
2014-01-1514011720-003ND
2014-01-1514011720-004ND
2014-04-1614043883-002ND
2014-04-1614043883-003ND
2014-04-1614043883-001ND
2014-04-1614043883-004ND
2014-07-1614071766-002ND
2014-07-1614071766-003ND
2014-07-1614071766-001ND
2014-07-1614071766-004ND
2014-10-161441972-021.17 ppb
2014-10-161441972-03ND
2014-10-161441972-04ND
2014-10-161441972-01ND
2015-01-151502187-04ND
2015-01-151502187-021.17 ppb
2015-01-151502187-01ND
2015-01-151502187-03ND
2015-04-161504D68-004ND
2015-04-161504D68-001ND
2015-04-161504D68-002ND
2015-04-161504D68-003ND
2015-07-141507C48-004ND
2015-07-141507C48-001ND
2015-07-141507C48-002ND
2015-07-141507C48-003ND
2015-10-151510D83-003ND
2015-10-151510D83-001ND
2015-10-151510D83-002ND
2015-10-211510J11-001ND
2016-01-22L6027520-4ND
2016-01-22L6027520-1ND
2016-01-22L6027520-3ND
2016-01-22L6027520-2ND
2016-04-153432602ND
2016-04-153432604ND
2016-04-153432605ND
2016-04-153432603ND
2016-07-20HA080416-06ND
2016-07-20HA080416-07ND
2016-07-20HA080416-09ND
2016-07-20HA080416-08ND
2016-10-12HA102516-09ND
2016-10-12HA102516-10ND
2016-10-12HA102516-07ND
2016-10-12HA102516-08ND
2017-01-19HA020817-08ND
2017-01-19HA020817-06ND
2017-01-19HA020817-09ND
2017-01-19HA020817-071.000 ppb
2017-04-28HA051117-27ND
2017-04-28HA051117-30ND
2017-04-28HA051117-29ND
2017-04-28HA051117-28ND
2017-07-17HA080117-13ND
2017-07-17HA080117-15ND
2017-07-17HA080117-12ND
2017-07-17HA080117-14ND
2017-10-167033064002ND
2017-10-167033064004ND
2017-10-167033064003ND
2017-10-167033064001ND
2018-01-16HA012318-07ND
2018-01-16HA012318-09ND
2018-01-16HA012318-06ND
2018-01-16HA012318-081.53 ppb
2018-04-16HA050118-17ND
2018-04-16HA050118-20ND
2018-04-16HA050118-18ND
2018-04-16HA050118-19ND
2018-07-167058580003-HAAND
2018-07-167058580002-HAAND
2018-07-167058580004-HAAND
2018-07-167058580001-HAAND
2018-10-167068208003-HAAND
2018-10-167068208002-HAAND
2018-10-167068208004-HAAND
2018-10-167068208001-HAAND
2019-01-157076709001-HAAND
2019-01-157076709004-HAAND
2019-01-157076709002-HAAND
2019-01-157076709003-HAAND
2019-04-177086533004-HAAND
2019-04-177086533003-HAAND
2019-04-177086533001-HAAND
2019-04-177086533002-HAAND
2019-07-157098005004-HAAND
2019-07-157098005001-HAAND
2019-07-157098005002-HAAND
2019-07-157098005003-HAAND
2019-10-1770109060001-HAAND
2019-10-1770109060002-HAAND
2019-10-1770109060003-HAAND
2019-10-1770109060004-HAAND