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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

St. Tam Parish - Cross Gates SD

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane 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

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND40ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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 dibromochloromethane 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
2014-05-27AD91759ND
2014-05-27AD91757ND
2014-05-27AD91759ND
2014-05-27AD91757ND
2014-08-12207957001ND
2014-08-12207957001ND
2014-08-12207957002ND
2014-08-12207957002ND
2015-08-182024427001ND
2015-08-182024427002ND
2015-08-182024427002ND
2015-08-182024427001ND
2016-08-022040597001ND
2016-08-022040598001ND
2016-08-022040598001ND
2016-08-022040597001ND
2017-08-1635331308014ND
2017-08-1635331308014ND
2017-08-1635331308013ND
2017-08-1635331308013ND
2018-08-0635409227002ND
2018-08-0635409227001ND
2018-08-0635409227001ND
2018-08-0635409227002ND
2019-08-1235489529001ND
2019-08-1235489529002ND
2019-08-1235489529001ND
2019-08-1235489529002ND