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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Town of Blacksburg

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane 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)

28

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.244 ppb167ND - 0.600 ppb
20150.188 ppb165ND - 0.700 ppb
20160.0625 ppb162ND - 0.500 ppb
20170.144 ppb164ND - 0.600 ppb
20180.0750 ppb162ND - 0.700 ppb
20190.331 ppb168ND - 0.800 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2014-01-09E131205413ND
2014-01-09E131205409ND
2014-01-09E131205414ND
2014-01-09E131205416ND
2014-04-21E1403049530.600 ppb
2014-04-21E140304940ND
2014-04-21E1403049610.500 ppb
2014-04-21E1403049580.500 ppb
2014-08-26E1406059220.600 ppb
2014-08-26E1406059190.600 ppb
2014-08-26E1406059170.500 ppb
2014-08-26E1406059240.600 ppb
2014-10-27E140902487ND
2014-10-27E140902490ND
2014-10-27E140902488ND
2014-10-27E140902486ND
2015-01-12VA010-DCLSND
2015-01-12VA010-DCLSND
2015-01-12VA010-DCLSND
2015-01-12VA010-DCLSND
2015-04-06VA010-DCLS0.500 ppb
2015-04-06VA010-DCLSND
2015-04-06VA010-DCLSND
2015-04-06VA010-DCLSND
2015-07-13VA010-DCLS0.600 ppb
2015-07-13VA010-DCLS0.600 ppb
2015-07-13VA010-DCLS0.600 ppb
2015-07-13VA010-DCLS0.700 ppb
2015-10-12VA010-DCLSND
2015-10-12VA010-DCLSND
2015-10-12VA010-DCLSND
2015-10-12VA010-DCLSND
2016-01-11E151201889ND
2016-01-11E151201887ND
2016-01-11E151201892ND
2016-01-11E151201894ND
2016-04-12E160302024ND
2016-04-12E160302026ND
2016-04-12E160302029ND
2016-04-12E160302022ND
2016-07-13E160605825ND
2016-07-13E160605822ND
2016-07-13E1606058260.500 ppb
2016-07-13E160605824ND
2016-10-18E1609014240.500 ppb
2016-10-18E160901429ND
2016-10-18E160901425ND
2016-10-18E160901427ND
2017-01-17E161202890ND
2017-01-17E161202893ND
2017-01-17E161202892ND
2017-01-17E161202895ND
2017-04-11E170305243ND
2017-04-11E170305249ND
2017-04-11E170305244ND
2017-04-11E170305245ND
2017-07-11E170607372ND
2017-07-11E170607364ND
2017-07-11E170607370ND
2017-07-11E170607363ND
2017-10-10E1709025120.500 ppb
2017-10-10E1709025090.600 ppb
2017-10-10E1709025110.600 ppb
2017-10-10E1709025160.600 ppb
2018-01-10E171203600ND
2018-01-10E171203598ND
2018-01-10E171203596ND
2018-01-10E171203594ND
2018-04-10E180307406ND
2018-04-10E180307401ND
2018-04-10E180307403ND
2018-04-10E180307405ND
2018-07-10E1806089470.700 ppb
2018-07-10E180608946ND
2018-07-10E180608943ND
2018-07-10E1806089420.500 ppb
2018-10-10E180906367ND
2018-10-10E180906369ND
2018-10-10E180906371ND
2018-10-10E180906373ND
2019-01-08E181206334ND
2019-01-08E181206335ND
2019-01-08E181206337ND
2019-01-08E181206340ND
2019-04-09E1903058710.800 ppb
2019-04-09E1903058760.600 ppb
2019-04-09E1903058740.600 ppb
2019-04-09E1903058720.800 ppb
2019-07-10E190607321ND
2019-07-10E190607325ND
2019-07-10E190607324ND
2019-07-10E190607319ND
2019-10-09E1910010540.700 ppb
2019-10-09E1910010500.600 ppb
2019-10-09E1910010490.600 ppb
2019-10-09E1910010470.600 ppb