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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Sun Valley Gid

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)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.106 ppb161ND - 1.70 ppb
20150.194 ppb163ND - 1.30 ppb
20160.556 ppb164ND - 3.90 ppb
20170.413 ppb164ND - 2.20 ppb
20180.1000 ppb162ND - 1.10 ppb
20190.0625 ppb161ND - 1.000 ppb

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
2014-03-12EN2014-00001160ND
2014-03-12EN2014-00001159ND
2014-03-12EN2014-00001157ND
2014-03-12EN2014-00001158ND
2014-06-051406380-002ND
2014-06-051406380-003ND
2014-06-051406380-004ND
2014-06-051406380-005ND
2014-09-03EN2014-000046441.70 ppb
2014-09-03EN2014-00004645ND
2014-09-03EN2014-00004646ND
2014-09-03EN2014-00004647ND
2014-12-08EN2014-00006662ND
2014-12-08EN2014-00006661ND
2014-12-08EN2014-00006664ND
2014-12-08EN2014-00006663ND
2015-03-02EN2015-00001041ND
2015-03-02EN2015-00001040ND
2015-03-02EN2015-00001039ND
2015-03-02EN2015-00001038ND
2015-06-04EN2015-00002638ND
2015-06-04EN2015-00002639ND
2015-06-04EN2015-00002637ND
2015-06-04EN2015-00002636ND
2015-09-03EN2015-000044881.10 ppb
2015-09-03EN2015-00004487ND
2015-09-03EN2015-00004486ND
2015-09-03EN2015-000044891.30 ppb
2015-12-01EN2015-000060610.700 ppb
2015-12-01EN2015-00006064ND
2015-12-01EN2015-00006063ND
2015-12-01EN2015-00006062ND
2016-03-02EN2016-00000849ND
2016-03-02EN2016-00000850ND
2016-03-02EN2016-00000848ND
2016-03-02EN2016-00000847ND
2016-06-02EN2016-00002468ND
2016-06-02EN2016-00002467ND
2016-06-02EN2016-00002466ND
2016-06-02EN2016-00002469ND
2016-09-222016092306081.50 ppb
2016-09-222016092306113.90 ppb
2016-09-222016092306101.90 ppb
2016-09-222016092306091.60 ppb
2016-12-05EN2016-00006352ND
2016-12-05EN2016-00006351ND
2016-12-05EN2016-00006350ND
2016-12-05EN2016-00006349ND
2017-03-01EN2017-00000882ND
2017-03-01EN2017-00000881ND
2017-03-01EN2017-00000880ND
2017-03-01EN2017-00000879ND
2017-06-01EN2017-00003396ND
2017-06-01EN2017-00003398ND
2017-06-01EN2017-00003397ND
2017-06-01EN2017-00003399ND
2017-09-06EN2017-00005369ND
2017-09-06EN2017-00005370ND
2017-09-06EN2017-00005371ND
2017-09-06EN2017-00005372ND
2017-12-04EN2017-000070261.000 ppb
2017-12-04EN2017-000070272.20 ppb
2017-12-04EN2017-000070281.70 ppb
2017-12-04EN2017-000070291.70 ppb
2018-03-05EN2018-00001122ND
2018-03-05EN2018-00001121ND
2018-03-05EN2018-00001120ND
2018-03-05EN2018-00001119ND
2018-06-05EN2018-00002765ND
2018-06-05EN2018-00002762ND
2018-06-05EN2018-00002763ND
2018-06-05EN2018-00002764ND
2018-09-04EN2018-00004531ND
2018-09-04EN2018-000045301.10 ppb
2018-09-04EN2018-00004529ND
2018-09-04EN2018-000045280.500 ppb
2018-12-03EN2018-00006026ND
2018-12-03EN2018-00006027ND
2018-12-03EN2018-00006028ND
2018-12-03EN2018-00006029ND
2019-03-04EN2019-00000848ND
2019-03-04EN2019-00000849ND
2019-03-04EN2019-00000850ND
2019-03-04EN2019-00000851ND
2019-06-03201906050398ND
2019-06-03201906050401ND
2019-06-03201906050400ND
2019-06-03201906050399ND
2019-09-032019090506001.000 ppb
2019-09-03201909050602ND
2019-09-03201909050601ND
2019-09-03201909050599ND
2019-12-03201912050481ND
2019-12-03201912050480ND
2019-12-03201912050479ND
2019-12-03201912050477ND