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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Cambridge

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

 

93

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
20150.139 ppb164ND - 0.690 ppb
2016ND160ND
20170.0294 ppb171ND - 0.500 ppb
20180.125 ppb164ND - 0.500 ppb
20190.278 ppb124ND - 0.950 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
2014-02-04902063ND
2014-02-04902062ND
2014-02-04902061ND
2014-02-04902064ND
2014-05-06905099ND
2014-05-06905100ND
2014-05-06905101ND
2014-05-06905102ND
2014-08-06908057ND
2014-08-06908056ND
2014-08-06908055ND
2014-08-06908054ND
2014-11-05911063ND
2014-11-05911062ND
2014-11-05911061ND
2014-11-05911064ND
2015-02-03102050ND
2015-02-03102051ND
2015-02-03102052ND
2015-02-031020530.690 ppb
2015-05-05105110ND
2015-05-05105111ND
2015-05-05105112ND
2015-05-07105109ND
2015-08-061081000.510 ppb
2015-08-06111080980.510 ppb
2015-08-06108101ND
2015-08-061080990.520 ppb
2015-11-03111067ND
2015-11-03111066ND
2015-11-03111065ND
2015-11-03111068ND
2016-02-02202072ND
2016-02-02202071ND
2016-02-02202070ND
2016-02-02202069ND
2016-05-0316-16411-02ND
2016-05-0316-16411-03ND
2016-05-0316-16411-04ND
2016-05-0316-16411-01ND
2016-08-0216-22138-04ND
2016-08-0216-22138-01ND
2016-08-0216-22138-02ND
2016-08-0216-22138-03ND
2016-11-0716-29036-03ND
2016-11-0716-29036-02ND
2016-11-0716-29036-04ND
2016-11-0716-29036-01ND
2017-02-0717-12210-01ND
2017-02-0717-12210-02ND
2017-02-0717-12210-03ND
2017-02-0717-12210-04ND
2017-05-0217-17675-01ND
2017-05-0217-17675-02ND
2017-05-0217-17675-03ND
2017-05-0217-17675-04ND
2017-08-0717-25015-01ND
2017-08-0717-25015-02ND
2017-08-0717-25015-03ND
2017-08-0717-25015-04ND
2017-10-1017-29729-02ND
2017-11-0717-31699-010.500 ppb
2017-11-0717-31699-02ND
2017-11-0717-31699-03ND
2017-11-0717-31699-04ND
2018-02-06M18-12751-04ND
2018-02-06M18-12751-03ND
2018-02-06M18-12751-02ND
2018-02-07M18-12751-01ND
2018-05-0118-18101-01ND
2018-05-0118-18101-02ND
2018-05-0118-18101-03ND
2018-05-0118-18101-04ND
2018-08-0718-26645-010.500 ppb
2018-08-0718-26645-040.500 ppb
2018-08-0718-26645-030.500 ppb
2018-08-0718-26645-020.500 ppb
2018-11-0618-34405-03ND
2018-11-0618-34405-04ND
2018-11-0618-34405-01ND
2018-11-0618-34405-02ND
2019-02-0519-12501-03ND
2019-02-0519-12501-04ND
2019-02-0519-12501-02ND
2019-02-0519-12501-01ND
2019-05-07190512120.950 ppb
2019-05-07190512130.730 ppb
2019-05-07190512140.880 ppb
2019-05-07190512150.780 ppb
2019-08-0619080748ND
2019-08-0619080749ND
2019-08-0619080750ND
2019-08-0619080751ND