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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

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Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015ND20ND
2016ND30ND
2017ND20ND
2018ND20ND
2019ND30ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as 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
2015-06-11Q1521639008ND
2015-09-02Q1534386008ND
2016-03-01Q1608433001ND
2016-03-01Q1608433004ND
2016-06-02Q1621922011ND
2017-05-18Q1720486001ND
2017-05-18Q1720486004ND
2018-06-19Q1824272009ND
2018-06-19Q1824272005ND
2019-03-14Q1910960007ND
2019-03-14Q1910960005ND
2019-06-03Q1930766005ND