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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Columbia Water Company

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

 

97

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.179 ppb164ND - 0.880 ppb
2015ND160ND
20160.276 ppb164ND - 1.40 ppb
2017ND160ND
2018ND160ND
2019ND170ND

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
2014-01-131067056004ND
2014-01-131067056001ND
2014-01-131067056002ND
2014-01-131067056003ND
2014-04-152001685001ND
2014-04-152001685004ND
2014-04-152001685002ND
2014-04-152001685003ND
2014-07-142017764001ND
2014-07-142017764003ND
2014-07-142017764004ND
2014-07-142017764002ND
2014-10-1520345510030.750 ppb
2014-10-1520345510040.690 ppb
2014-10-1520345510020.880 ppb
2014-10-1520345510010.550 ppb
2015-01-1212375752ND
2015-01-1212375746ND
2015-01-1212375734ND
2015-01-1212375740ND
2015-04-1312722980ND
2015-04-1312722974ND
2015-04-1312722962ND
2015-04-1312722968ND
2015-07-1313109135ND
2015-07-1313109141ND
2015-07-1313109147ND
2015-07-1313109129ND
2015-10-1213484911ND
2015-10-1213484905ND
2015-10-1213484917ND
2015-10-1213484899ND
2016-01-1213844098ND
2016-01-1213844092ND
2016-01-1213844086ND
2016-01-1213844104ND
2016-04-1514700942ND
2016-04-1514217716ND
2016-04-1514217728ND
2016-04-1514217722ND
2016-07-1214700995ND
2016-07-12147009831.40 ppb
2016-07-12147009890.880 ppb
2016-07-12147009770.830 ppb
2016-10-1215195365ND
2016-10-1215195371ND
2016-10-12151953591.30 ppb
2016-10-1215195353ND
2017-01-1615626183ND
2017-01-1615626177ND
2017-01-1615626165ND
2017-01-1615626171ND
2017-04-1716058921ND
2017-04-1716058914ND
2017-04-1716058909ND
2017-04-1716058902ND
2017-07-1716531824ND
2017-07-1716531818ND
2017-07-1716531812ND
2017-07-1716531830ND
2017-10-1616992985ND
2017-10-1616992979ND
2017-10-1616992991ND
2017-10-1616992973ND
2018-01-152288787004ND
2018-01-152288787003ND
2018-01-152288787002ND
2018-01-152288787001ND
2018-04-162309575003ND
2018-04-162309575001ND
2018-04-162309575004ND
2018-04-162309575002ND
2018-07-168074402-02ND
2018-07-168074402-03ND
2018-07-168074402-04ND
2018-07-168074402-01ND
2018-10-162344529004ND
2018-10-162344529002ND
2018-10-162344529001ND
2018-10-162344529003ND
2019-01-169012782-02ND
2019-01-169012782-04REND
2019-01-169012782-04ND
2019-01-169012782-03ND
2019-01-169012782-01ND
2019-04-159040018-03ND
2019-04-159040018-04ND
2019-04-159040018-01ND
2019-04-159040018-02ND
2019-07-159070011-01ND
2019-07-159070011-04ND
2019-07-159070011-03ND
2019-07-159070011-02ND
2019-10-149100011-04ND
2019-10-149100011-03ND
2019-10-149100011-02ND
2019-10-149100011-01ND