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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Hudson Waterworks

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

 

74

Samples

0

Samples exceeding legal limit (MCL)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
20150.0500 ppb81ND - 0.400 ppb
20160.106 ppb167ND - 0.580 ppb
20170.0831 ppb167ND - 0.230 ppb
20180.110 ppb1610ND - 0.230 ppb
20190.0431 ppb162ND - 0.360 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
2014-08-18811213ND
2014-08-18811212ND
2015-09-15883173ND
2015-09-15883174ND
2015-09-15883172ND
2015-09-158831710.400 ppb
2015-12-14897939ND
2015-12-14897938ND
2015-12-14897937ND
2015-12-14897936ND
2016-03-169106370.340 ppb
2016-03-16910638ND
2016-03-16910635ND
2016-03-16910636ND
2016-06-13926540ND
2016-06-139265410.580 ppb
2016-06-13926542ND
2016-06-13926539ND
2016-09-129448040.210 ppb
2016-09-129448050.160 ppb
2016-09-129448060.120 ppb
2016-09-129448070.150 ppb
2016-12-12965935ND
2016-12-129659340.140 ppb
2016-12-12965932ND
2016-12-12965933ND
2017-03-14977897ND
2017-03-14977896ND
2017-03-14977898ND
2017-03-14977899ND
2017-06-139972480.180 ppb
2017-06-139972460.200 ppb
2017-06-139972470.210 ppb
2017-06-139972450.230 ppb
2017-09-1110173370.150 ppb
2017-09-1110173350.130 ppb
2017-09-111017336ND
2017-09-111017334ND
2017-12-121033119ND
2017-12-121033118ND
2017-12-1210331200.230 ppb
2017-12-121033121ND
2018-03-191045728ND
2018-03-191045727ND
2018-03-191045729ND
2018-03-191045726ND
2018-06-181062004ND
2018-06-1810620060.140 ppb
2018-06-1810620050.170 ppb
2018-06-1810620030.210 ppb
2018-09-1110794360.220 ppb
2018-09-1110794380.230 ppb
2018-09-1110794370.210 ppb
2018-09-1110794390.190 ppb
2018-12-1110971840.1000 ppb
2018-12-1110971830.0990 ppb
2018-12-111097181ND
2018-12-1910984600.190 ppb
2019-03-191110407ND
2019-03-191110408ND
2019-03-191110409ND
2019-03-1911104100.330 ppb
2019-06-181128937ND
2019-06-181128938ND
2019-06-181128940ND
2019-06-181128939ND
2019-09-171148787ND
2019-09-171148788ND
2019-09-171148789ND
2019-09-171148790ND
2019-12-091165055ND
2019-12-161165760ND
2019-12-161165759ND
2019-12-1611657610.360 ppb