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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Water Authority of Western Nassau

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

 

23

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
20180.243 ppb232ND - 3.00 ppb
2019N/A00N/A

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
2018-03-2370460790043.00 ppb
2018-03-23460790032.60 ppb
2018-03-2370460790020ND
2018-03-237046079005ND
2018-03-237046079006ND
2018-03-237046079001ND
2018-06-137054827002ND
2018-06-137054827004ND
2018-06-137054827005ND
2018-06-137054827001ND
2018-06-137054827003ND
2018-06-187055319001ND
2018-09-17706507004ND
2018-09-177065070001ND
2018-09-177065070006ND
2018-09-177065070002ND
2018-09-177065070005ND
2018-09-1765070003ND
2018-12-117073628002ND
2018-12-117073628006ND
2018-12-117073628001ND
2018-12-117073628005ND
2018-12-117073628003ND