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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Central Water System

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
2016ND160ND
20170.120 ppb162ND - 0.960 ppb
2018ND160ND
2019ND160ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-02-2424835701ND
2014-02-2424835601ND
2014-02-2424835701ND
2014-02-2424835601ND
2014-05-1225706901ND
2014-05-1225707001ND
2014-05-1225707001ND
2014-05-1225706901ND
2014-08-2526758401ND
2014-08-2526758501ND
2014-08-2526758501ND
2014-08-2526758401ND
2014-11-1727550601ND
2014-11-1727550701ND
2014-11-1727550701ND
2014-11-1727550601ND
2015-02-1728176101ND
2015-02-1728176201ND
2015-02-1728176201ND
2015-02-1728176101ND
2015-05-2128916201ND
2015-05-2128916301ND
2015-05-2128916301ND
2015-05-2128916201ND
2015-08-1129837101ND
2015-08-1129837001ND
2015-08-1129837101ND
2015-08-1129837001ND
2015-11-1630559701ND
2015-11-1630559801ND
2015-11-1630559801ND
2015-11-1630559701ND
2016-02-2431154801ND
2016-02-2431154901ND
2016-02-2431154901ND
2016-02-2431154801ND
2016-05-2331844501ND
2016-05-2331844401ND
2016-05-2331844501ND
2016-05-2331844401ND
2016-08-2232868201ND
2016-08-2232868301ND
2016-08-2232868301ND
2016-08-2232868201ND
2016-11-1533716901ND
2016-11-1533717001ND
2016-11-1533717001ND
2016-11-1533716901ND
2017-02-1735296086012ND
2017-02-17352960860110.960 ppb
2017-02-17352960860110.960 ppb
2017-02-1735296086012ND
2017-05-0435311308014ND
2017-05-0435311308014ND
2017-05-0435311308015ND
2017-05-0435311308015ND
2017-08-0435328362035ND
2017-08-0435328362036ND
2017-08-0435328362035ND
2017-08-0435328362036ND
2017-11-2035349688002ND
2017-11-2035349688001ND
2017-11-2035349688001ND
2017-11-2035349688002ND
2018-02-0835373978002ND
2018-02-0835373978001ND
2018-02-0835373978002ND
2018-02-0835373978001ND
2018-05-0335390317002ND
2018-05-0335390317002ND
2018-05-0335390317001ND
2018-05-0335390317001ND
2018-08-0235408683002ND
2018-08-0235408683001ND
2018-08-0235408683001ND
2018-08-0235408683002ND
2018-11-0135428189001ND
2018-11-0135428189002ND
2018-11-0135428189001ND
2018-11-0135428189002ND
2019-02-1435449085002ND
2019-02-1435449085001ND
2019-02-1435449085001ND
2019-02-1435449085002ND
2019-05-1435469028002ND
2019-05-1435469028002ND
2019-05-1435469028001ND
2019-05-1435469028001ND
2019-08-2135492449002ND
2019-08-2135492449001ND
2019-08-2135492449001ND
2019-08-2135492449002ND
2019-11-2135514610001ND
2019-11-2135514610002ND
2019-11-2135514610001ND
2019-11-2135514610002ND