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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Town Of Yountville

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

 

47

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND70ND
2016ND80ND
2017ND80ND
2018ND80ND
2019ND80ND

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
2014-02-049541-008-0935ND
2014-02-049541-007-0915ND
2014-05-069541-008-0950ND
2014-05-069541-007-0938ND
2014-08-129541-008-0938ND
2014-08-129541-007-0922ND
2014-11-049541-008-0810ND
2014-11-049541-007-0740ND
2015-02-109541-007-0755ND
2015-05-059541-007-0933ND
2015-05-059541-008-1000ND
2015-08-049541-007-0949ND
2015-08-049541-008-1022ND
2015-11-049541-007-0903ND
2015-11-049541-008-1000ND
2016-02-109541-007-0850ND
2016-02-109541-008-0915ND
2016-05-039541-007-0830ND
2016-05-039541-008-0904ND
2016-08-029541-007-0822ND
2016-08-029541-008-0900ND
2016-11-089541-007-0950ND
2016-11-089541-008-1005ND
2017-02-149541-008-0933ND
2017-02-149541-007-0917ND
2017-05-029541-008-0848ND
2017-05-029541-007-0830ND
2017-08-019541-008-0927ND
2017-08-019541-007-0908ND
2017-11-029541-007-1523ND
2017-11-029541-008-1501ND
2018-02-069541-007-0917ND
2018-02-069541-008-0933ND
2018-05-019541-008-0900ND
2018-05-019541-007-0845ND
2018-08-079541-008-0800ND
2018-08-079541-007-0744ND
2018-11-069541-008-1142ND
2018-11-069541-007-1109ND
2019-02-059541-008-0906ND
2019-02-059541-007-0846ND
2019-05-089541-008-0933ND
2019-05-089541-007-0908ND
2019-08-069541-008-0912ND
2019-08-069541-007-0853ND
2019-11-129541-008-1140ND
2019-11-129541-007-1125ND