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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

City of Newton

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)

42

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.291 ppb166ND - 1.10 ppb
20150.351 ppb166ND - 1.50 ppb
20160.633 ppb1610ND - 1.80 ppb
20170.629 ppb169ND - 1.60 ppb
20180.255 ppb165ND - 1.30 ppb
20190.306 ppb166ND - 1.10 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
2014-02-1060132ND
2014-02-1060050ND
2014-02-1060042ND
2014-02-1060035ND
2014-05-05109976ND
2014-05-051099750.510 ppb
2014-05-05109974ND
2014-05-051099730.640 ppb
2014-08-181759991.10 ppb
2014-08-18175998ND
2014-08-181760000.650 ppb
2014-08-181760010.650 ppb
2014-11-172330821.10 ppb
2014-11-17233081ND
2014-11-17233080ND
2014-11-17233079ND
2015-02-23284218ND
2015-02-23284217ND
2015-02-23284216ND
2015-02-232842150.500 ppb
2015-05-18334995ND
2015-05-18334996ND
2015-05-18334998ND
2015-05-183349970.820 ppb
2015-08-18390599ND
2015-08-18390597ND
2015-08-183905951.20 ppb
2015-08-183905890.950 ppb
2015-11-174281650.640 ppb
2015-11-17428164ND
2015-11-17428163ND
2015-11-174281621.50 ppb
2016-02-224971140.580 ppb
2016-02-224971130.910 ppb
2016-02-22497115ND
2016-02-22497116ND
2016-05-235514040.550 ppb
2016-05-23551403ND
2016-05-235514021.40 ppb
2016-05-23551401ND
2016-08-22607948ND
2016-08-226079470.800 ppb
2016-08-226079460.780 ppb
2016-08-226079451.30 ppb
2016-11-07656978ND
2016-11-076569811.80 ppb
2016-11-076569800.500 ppb
2016-11-076569791.50 ppb
2017-02-13708232ND
2017-02-13708231ND
2017-02-137082301.60 ppb
2017-02-137082290.820 ppb
2017-05-237661641.40 ppb
2017-05-23766163ND
2017-05-23766162ND
2017-05-237661610.690 ppb
2017-08-298297781.40 ppb
2017-08-29829777ND
2017-08-298297801.60 ppb
2017-08-298297810.720 ppb
2017-11-148789681.10 ppb
2017-11-148789670.730 ppb
2017-11-14878966ND
2017-11-14878965ND
2018-02-12908555ND
2018-02-12908554ND
2018-02-129085530.530 ppb
2018-02-20926774ND
2018-05-21974182ND
2018-05-21974183ND
2018-05-21974185ND
2018-05-219741840.520 ppb
2018-08-1310251611.10 ppb
2018-08-131025160ND
2018-08-131025159ND
2018-08-1310251581.30 ppb
2018-11-131077378ND
2018-11-131077377ND
2018-11-131077376ND
2018-11-1310773750.630 ppb
2019-02-041114511ND
2019-02-041114510ND
2019-02-041114512ND
2019-02-041114513ND
2019-05-201157986ND
2019-05-2011579850.760 ppb
2019-05-201157984ND
2019-05-2011579830.630 ppb
2019-08-1312232380.850 ppb
2019-08-131223237ND
2019-08-1312232361.10 ppb
2019-08-131223235ND
2019-11-0412720520.700 ppb
2019-11-041272055ND
2019-11-041272054ND
2019-11-0412720530.860 ppb