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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

University of Connecticut - Main Campus

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

 

100

Samples

0

Samples exceeding legal limit (MCL)

51

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015N/A00N/A
20160.381 ppb164ND - 2.10 ppb
20171.51 ppb2013ND - 6.60 ppb
20181.91 ppb2417ND - 6.20 ppb
20191.53 ppb2417ND - 9.50 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
2014-03-10BG17099HAA5ND
2014-03-10BG17096HAA5ND
2014-03-10BG17102HAA5ND
2014-03-10BG17101HAA5ND
2014-06-12BG56337HAA5ND
2014-06-12BG56346HAA5ND
2014-06-12BG56340HAA5ND
2014-06-12BG56345HAA5ND
2014-09-16BH14164HAA5ND
2014-09-16BH14167HAA5ND
2014-09-16BH14172HAA5ND
2014-09-16BH14173HAA5ND
2014-12-10BH51407HAA5ND
2014-12-10BH51410HAA5ND
2014-12-10BH51415HAA5ND
2014-12-10BH51416HAA5ND
2016-03-09BK75989HAA5ND
2016-03-09BK75992HAA5ND
2016-03-09BK75991HAA5ND
2016-03-09BK75990HAA5ND
2016-06-09BN51405HAA5ND
2016-06-09BN51408HAA5ND
2016-06-09BN51412HAA5ND
2016-06-09BN51413HAA5ND
2016-09-21BV20291HAA51.000 ppb
2016-09-21BV20290HAA5ND
2016-09-21BV20288HAA5ND
2016-09-21BV20289HAA5ND
2016-12-13BX04254HAA51.20 ppb
2016-12-13BX04255HAA51.80 ppb
2016-12-13BX04256HAA52.10 ppb
2016-12-13BX04257HAA5ND
2017-03-08BX81804HAA51.70 ppb
2017-03-08BX81805HAA51.000 ppb
2017-03-08BX81806HAA56.60 ppb
2017-03-08BX81807HAA5ND
2017-06-13BY38126HAA51.20 ppb
2017-06-13BY38127HAA5ND
2017-06-13BY38125HAA51.000 ppb
2017-06-13BY38124HAA5ND
2017-08-09BY81246HAA52.10 ppb
2017-08-09BY81247HAA51.40 ppb
2017-08-09BY81248HAA5ND
2017-08-10BY82233HAA52.30 ppb
2017-09-05BY94975HAA53.20 ppb
2017-09-05BY94976HAA52.60 ppb
2017-09-06BY95732HAA52.30 ppb
2017-09-07BY96696HAA5ND
2017-12-12BZ58243HAA5ND
2017-12-12BZ58242HAA51.80 ppb
2017-12-12BZ58240HAA53.00 ppb
2017-12-12BZ58241HAA5ND
2018-03-15CA02988HAA51.20 ppb
2018-03-15CA02989HAA56.20 ppb
2018-03-15CA02990HAA5ND
2018-03-15CA02987HAA53.50 ppb
2018-06-12CA68568HAA54.70 ppb
2018-06-12CA68569HAA53.30 ppb
2018-06-12CA68570HAA55.00 ppb
2018-06-12CA68571HAA5ND
2018-09-19DBP 2005061891.30 ppb
2018-09-19DBP 2005061860.600 ppb
2018-09-19DBP 200506184ND
2018-09-19DBP 2005061823.30 ppb
2018-09-25DBP 2005067203.20 ppb
2018-09-25DBP 200506721ND
2018-09-25DBP 2005067220.600 ppb
2018-09-25DBP 2005067232.60 ppb
2018-09-26DBP 200506966ND
2018-09-27DBP 2005070732.20 ppb
2018-12-04DBP 2005147240.900 ppb
2018-12-04DBP 200514725ND
2018-12-04DBP 2005147260.600 ppb
2018-12-04DBP 2005147283.40 ppb
2018-12-17DBP 200516282ND
2018-12-17DBP 2005162813.30 ppb
2019-03-18DBP 2005250242.00 ppb
2019-03-18DBP 2005250262.80 ppb
2019-03-18DBP 2005250290.700 ppb
2019-03-18DBP 2005250310.700 ppb
2019-03-18DBP 2005250332.20 ppb
2019-03-18DBP 200525034ND
2019-06-24DBP 2005375410.800 ppb
2019-06-24DBP 2005375421.90 ppb
2019-06-24DBP 200537543ND
2019-06-25DBP 2005378081.20 ppb
2019-06-25DBP 2005378072.20 ppb
2019-06-25DBP 2005378061.80 ppb
2019-09-16DBP 2005490011.70 ppb
2019-09-16DBP 200549002ND
2019-09-16DBP 2005490400.700 ppb
2019-09-16DBP 200549041ND
2019-09-16DBP 2005490431.60 ppb
2019-09-16DBP 200549044ND
2019-12-09DBP 2005594122.30 ppb
2019-12-09DBP 2005594161.30 ppb
2019-12-09DBP 200559419ND
2019-12-09DBP 2005594229.50 ppb
2019-12-09DBP 2005594253.30 ppb
2019-12-09DBP 200559427ND