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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Town of Coahoma

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015ND10ND
2016ND60ND
2017ND30ND
20181.000 ppb62ND - 5.00 ppb
20190.375 ppb82ND - 2.00 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
2015-08-26150827-006HAND
2016-05-18160520-002HAND
2016-05-18160520-001HAND
2016-08-29160830-011HAND
2016-08-29160830-010HAND
2016-12-27161228-006HAND
2016-12-27161228-005HAND
2017-03-02170303-006HAND
2017-03-02170303-005HAND
2017-06-20170621-001HAND
2018-06-11180612-001HA1.000 ppb
2018-06-11180612-002HAND
2018-08-28180829-008HAND
2018-08-28180829-006HAND
2018-11-26181127-004HAND
2018-11-26181127-003HA5.00 ppb
2019-02-26190227-004HAND
2019-02-26190227-003HA2.00 ppb
2019-05-20190521-008HAND
2019-05-20190521-007HAND
2019-10-10191011-002HAND
2019-10-10191011-001HAND
2019-12-12191213-001HA1.000 ppb
2019-12-12191213-002HAND