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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

University of Kansas

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)

64

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.23 ppb16160.613 ppb - 2.10 ppb
20151.01 ppb1612ND - 2.20 ppb
20160.464 ppb167ND - 1.50 ppb
20170.556 ppb168ND - 2.10 ppb
20181.48 ppb1614ND - 3.30 ppb
20190.839 ppb167ND - 3.60 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
2014-02-11600200.932 ppb
2014-02-11600010.663 ppb
2014-02-11599870.613 ppb
2014-02-11599840.678 ppb
2014-05-121134841.50 ppb
2014-05-121134831.50 ppb
2014-05-121134821.60 ppb
2014-05-121134811.50 ppb
2014-08-191761502.10 ppb
2014-08-191761491.80 ppb
2014-08-191761511.80 ppb
2014-08-191803191.20 ppb
2014-11-242360371.10 ppb
2014-11-242360360.880 ppb
2014-11-242360351.000 ppb
2014-11-242360340.890 ppb
2015-02-022701730.870 ppb
2015-02-022701722.10 ppb
2015-02-022701710.890 ppb
2015-02-022701632.20 ppb
2015-05-133324491.40 ppb
2015-05-133324531.80 ppb
2015-05-133324551.50 ppb
2015-05-133324541.90 ppb
2015-08-10381599ND
2015-08-103815980.560 ppb
2015-08-10381597ND
2015-08-103815960.690 ppb
2015-11-03428184ND
2015-11-034281830.810 ppb
2015-11-034281821.40 ppb
2015-11-03428181ND
2016-02-08490347ND
2016-02-08490346ND
2016-02-08490348ND
2016-02-08490349ND
2016-05-23550722ND
2016-05-23550721ND
2016-05-235507201.30 ppb
2016-05-235507191.30 ppb
2016-08-22607164ND
2016-08-226071630.750 ppb
2016-08-226071620.600 ppb
2016-08-22607161ND
2016-11-02651302ND
2016-11-026513050.670 ppb
2016-11-026513041.30 ppb
2016-11-026513031.50 ppb
2017-02-07704776ND
2017-02-077047750.660 ppb
2017-02-077047740.650 ppb
2017-02-07704773ND
2017-05-23765663ND
2017-05-237656620.900 ppb
2017-05-237656610.780 ppb
2017-05-23765660ND
2017-08-218231421.50 ppb
2017-08-218231402.10 ppb
2017-08-218231441.30 ppb
2017-08-218231471.000 ppb
2017-11-08873219ND
2017-11-08873218ND
2017-11-08873217ND
2017-11-08873216ND
2018-02-07908588ND
2018-02-079085871.000 ppb
2018-02-079085860.730 ppb
2018-02-07908585ND
2018-05-219733510.960 ppb
2018-05-219733530.910 ppb
2018-05-219733551.90 ppb
2018-05-219733540.740 ppb
2018-08-2010283012.60 ppb
2018-08-2010283002.20 ppb
2018-08-2010282993.30 ppb
2018-08-2010282980.960 ppb
2018-11-0510704841.50 ppb
2018-11-0510704832.90 ppb
2018-11-0510704822.60 ppb
2018-11-0510704811.40 ppb
2019-02-1311207893.60 ppb
2019-02-1311207870.620 ppb
2019-02-131120790ND
2019-02-1311207911.90 ppb
2019-05-081158023ND
2019-05-0811580221.60 ppb
2019-05-0811580211.10 ppb
2019-05-081158020ND
2019-08-071219860ND
2019-08-071219859ND
2019-08-071219858ND
2019-08-071219857ND
2019-11-0412682572.20 ppb
2019-11-0412682602.40 ppb
2019-11-041268259ND
2019-11-041268258ND