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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Ratcliff

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

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND100ND
2015ND80ND
2016ND80ND
2017ND80ND
2018ND80ND
2019ND60ND

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
2014-01-1514017002502ND
2014-01-1514017002602ND
2014-02-2514058009002ND
2014-02-2514058009102ND
2014-04-1014101003902ND
2014-04-1014101003802ND
2014-07-0814190001802ND
2014-07-0814190001702ND
2014-10-1414289005502ND
2014-10-1414289005602ND
2015-01-1515016001902ND
2015-01-1515016001802ND
2015-04-1415106007502ND
2015-04-1415106007602ND
2015-07-1415197009702ND
2015-07-1415197009602ND
2015-10-1415289002302ND
2015-10-1415289002202ND
2016-01-1316015002202ND
2016-01-1316015002102ND
2016-04-1316106001202ND
2016-04-1316106001302ND
2016-07-1316196009302ND
2016-07-1316196009202ND
2016-10-1116288003102ND
2016-10-1116288003002ND
2017-01-1017013001602ND
2017-01-1017013001702ND
2017-04-1117103005602ND
2017-04-1117103005502ND
2017-07-1217194012802ND
2017-07-1217194012902ND
2017-10-1717292002602ND
2017-10-1717292002702ND
2018-01-1018011007701ND
2018-01-1018011007601ND
2018-04-0918101001502ND
2018-04-0918101001402ND
2018-07-0918192002702ND
2018-07-0918192002602ND
2018-10-0918283002702ND
2018-10-0918283002902ND
2019-01-1419017010602ND
2019-01-1419017010702ND
2019-07-3119213004301ND
2019-07-3119213004401ND
2019-10-0719283011302ND
2019-10-0719283011402ND