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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Rockett SUD

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)

52

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.68 ppb16161.20 ppb - 8.30 ppb
20152.68 ppb169ND - 7.85 ppb
20160.0794 ppb161ND - 1.27 ppb
20170.910 ppb1610ND - 1.84 ppb
20181.28 ppb1611ND - 3.27 ppb
20190.742 ppb165ND - 2.97 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
2014-03-24Q14092470045.00 ppb
2014-03-24Q14092470038.30 ppb
2014-03-24Q14092470023.50 ppb
2014-03-24Q14092470011.20 ppb
2014-06-10Q14203280044.60 ppb
2014-06-10Q14203280033.20 ppb
2014-06-10Q14203280025.20 ppb
2014-06-10Q14203280011.30 ppb
2014-09-08Q14420280025.30 ppb
2014-09-08Q14420280012.10 ppb
2014-09-08Q14420280034.90 ppb
2014-09-08Q14420280045.10 ppb
2014-12-16Q14601520052.60 ppb
2014-12-16Q14601520042.20 ppb
2014-12-16Q14601520032.20 ppb
2014-12-16Q14601520022.20 ppb
2015-03-17Q15098450047.00 ppb
2015-03-17Q15098450036.40 ppb
2015-03-17Q15098450021.50 ppb
2015-03-17Q1509845001ND
2015-04-20Q15146320053.58 ppb
2015-04-20Q15146320067.34 ppb
2015-04-20Q15146320047.85 ppb
2015-04-20Q15146320036.74 ppb
2015-09-10Q1535227004ND
2015-09-10Q1535227003ND
2015-09-10Q1535227002ND
2015-09-10Q1535227001ND
2015-10-19Q1540891004ND
2015-10-19Q1540891003ND
2015-10-19Q15408910021.11 ppb
2015-10-19Q15408910011.38 ppb
2016-03-23Q1611953002ND
2016-03-23Q1611953001ND
2016-03-23Q1611953003ND
2016-03-23Q1611953004ND
2016-06-23Q1625813004ND
2016-06-23Q1625813003ND
2016-06-23Q1625813002ND
2016-06-23Q1625813001ND
2016-09-27Q1640406004ND
2016-09-27Q1640406003ND
2016-09-27Q1640406002ND
2016-09-27Q1640406001ND
2016-12-05Q1652664003ND
2016-12-05Q16526640061.27 ppb
2016-12-05Q1652664005ND
2016-12-05Q1652664004ND
2017-02-15Q17065750041.68 ppb
2017-02-15Q17065750031.38 ppb
2017-02-15Q17065750021.49 ppb
2017-02-15Q1706575001ND
2017-05-11Q17194650021.48 ppb
2017-05-11Q17194650041.45 ppb
2017-05-11Q17194650031.21 ppb
2017-05-11Q17194650011.46 ppb
2017-08-02Q1732094002ND
2017-08-02Q1732094001ND
2017-08-02Q1732094003ND
2017-08-02Q1732094004ND
2017-11-27Q1760054006ND
2017-11-27Q17600540051.19 ppb
2017-11-27Q17600540041.38 ppb
2017-11-27Q17600540031.84 ppb
2018-02-22Q18074690043.27 ppb
2018-02-22Q18074690022.65 ppb
2018-02-22Q18074690033.04 ppb
2018-02-22Q18074690012.45 ppb
2018-04-23Q18164100011.43 ppb
2018-04-23Q18164100031.34 ppb
2018-04-23Q18164100041.37 ppb
2018-04-23Q18164100021.16 ppb
2018-08-13Q18322190051.21 ppb
2018-08-13Q18322190021.30 ppb
2018-08-13Q18322190041.18 ppb
2018-08-13Q1832219001ND
2018-12-03Q1848944005ND
2018-12-03Q1848944002ND
2018-12-03Q1848944004ND
2018-12-03Q1848944001ND
2019-02-27Q1908360005ND
2019-02-27Q19083600041.31 ppb
2019-02-27Q1908360006ND
2019-02-27Q1908360007ND
2019-05-09Q1923161006ND
2019-05-09Q1923161005ND
2019-05-09Q1923161004ND
2019-05-09Q1923161003ND
2019-08-12Q1953425006ND
2019-08-12Q1953425005ND
2019-08-12Q1953425004ND
2019-08-12Q1953425003ND
2019-12-04Q19790710032.97 ppb
2019-12-04Q19790710062.43 ppb
2019-12-04Q19790710052.73 ppb
2019-12-04Q19790710042.43 ppb