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EWG's Tap Water Database — 2021 UPDATE

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Dibromoacetic acid

St. Helena, City Of

Dibromoacetic 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

 

52

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.130 ppb101ND - 1.30 ppb
2015ND80ND
2016ND80ND
2017ND90ND
2018ND90ND
2019ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.04 ppb

The EWG Health Guideline of 0.04 ppb for dibromoacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-199590-016-0843ND
2014-02-199590-012-0832ND
2014-02-199590-011-0858ND
2014-02-199590-010-0925ND
2014-06-129590-016-0857ND
2014-06-129590-011-0919ND
2014-08-209590-016-0827ND
2014-08-209590-011-0757ND
2014-11-199590-016-08081.30 ppb
2014-11-199590-011-0902ND
2015-02-189590-011-0830ND
2015-02-189590-016-0850ND
2015-05-209590-011-0827ND
2015-05-209590-016-0846ND
2015-08-199590-011-0808ND
2015-08-199590-016-0827ND
2015-11-189590-011-0953ND
2015-11-189590-016-0837ND
2016-02-179590-011-0759ND
2016-02-179590-016-0816ND
2016-05-259590-011-0800ND
2016-05-259590-016-0800ND
2016-08-179590-011-0908ND
2016-08-179590-016-0847ND
2016-11-179590-016-0900ND
2016-11-179590-011-0850ND
2017-02-249590-011-0854ND
2017-02-249590-016-0912ND
2017-05-259590-016-1033ND
2017-05-259590-011-0848ND
2017-08-179590-011-0842ND
2017-08-179590-016-0955ND
2017-11-169590-015-0816ND
2017-11-169590-016-0857ND
2017-11-169590-011-0759ND
2018-02-219590-010-1010ND
2018-02-219590-016-0940ND
2018-02-229590-011-0915ND
2018-05-179590-016-1031ND
2018-05-179590-011-0906ND
2018-08-149590-016-0936ND
2018-08-149590-011-0811ND
2018-11-289590-016-1111ND
2018-11-289590-011-0944ND
2019-02-201610-016-0827ND
2019-02-201610-011-0730ND
2019-05-151610-016-0824ND
2019-05-151610-011-0840ND
2019-08-221610-016-0820ND
2019-08-221610-011-0743ND
2019-11-201610-016-0800ND
2019-11-201610-011-0815ND