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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Wvawc Bluestone Plant

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

 

97

Samples

0

Samples exceeding legal limit (MCL)

62

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.794 ppb1612ND - 2.00 ppb
20150.850 ppb1615ND - 1.70 ppb
20160.863 ppb1612ND - 1.70 ppb
20170.444 ppb167ND - 1.40 ppb
20180.353 ppb178ND - 1.30 ppb
20190.475 ppb168ND - 1.40 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
2014-02-1724803301ND
2014-02-1724803201ND
2014-02-1724803101ND
2014-02-1724803001ND
2014-05-12256261010.800 ppb
2014-05-12256260010.800 ppb
2014-05-12256259010.900 ppb
2014-05-12256258010.800 ppb
2014-08-13267871011.000 ppb
2014-08-13267870011.60 ppb
2014-08-13267872011.90 ppb
2014-08-13267873012.00 ppb
2014-11-10274805010.600 ppb
2014-11-10274804010.700 ppb
2014-11-10274803010.500 ppb
2014-11-10274802011.10 ppb
2015-02-09281226010.600 ppb
2015-02-09281225010.600 ppb
2015-02-0928122401ND
2015-02-09281223010.700 ppb
2015-05-19288788011.70 ppb
2015-05-19288789010.600 ppb
2015-05-19288791011.10 ppb
2015-05-19288790010.900 ppb
2015-08-18299190011.30 ppb
2015-08-18299189011.30 ppb
2015-08-18299188011.000 ppb
2015-08-18299187011.20 ppb
2015-11-09305276010.700 ppb
2015-11-09305275010.600 ppb
2015-11-09305274010.600 ppb
2015-11-09305273010.700 ppb
2016-02-1831174101ND
2016-02-1831174001ND
2016-02-1831174201ND
2016-02-1831174301ND
2016-05-10319023011.000 ppb
2016-05-10319022011.20 ppb
2016-05-10319021010.700 ppb
2016-05-10319020010.800 ppb
2016-08-11330277011.50 ppb
2016-08-11330276011.60 ppb
2016-08-11330275011.20 ppb
2016-08-11330274011.70 ppb
2016-11-15338281011.000 ppb
2016-11-15338280011.10 ppb
2016-11-15338279010.900 ppb
2016-11-15338278011.10 ppb
2017-02-16346349010.600 ppb
2017-02-1634634801ND
2017-02-1634634701ND
2017-02-1634634601ND
2017-05-1535420501ND
2017-05-1535420301ND
2017-05-1535420101ND
2017-05-15354199010.700 ppb
2017-08-14366692011.40 ppb
2017-08-14366691011.10 ppb
2017-08-14366690011.30 ppb
2017-08-14366689011.10 ppb
2017-11-1337671701ND
2017-11-13376715010.900 ppb
2017-11-1337671601ND
2017-11-1337671801ND
2018-02-1438598601ND
2018-02-1438598501ND
2018-02-1438598401ND
2018-02-1438598301ND
2018-05-1639354201ND
2018-05-1639354101ND
2018-05-1639354001ND
2018-05-1639353901ND
2018-08-09406881010.800 ppb
2018-08-09406878011.30 ppb
2018-08-09406879010.800 ppb
2018-08-09406880010.700 ppb
2018-11-06418962010.600 ppb
2018-11-06418961010.600 ppb
2018-11-06418960010.500 ppb
2018-11-06418959010.700 ppb
2018-11-2042403101ND
2019-02-1442951901ND
2019-02-1442952001ND
2019-02-1442952101ND
2019-02-1442952201ND
2019-05-18448182010.600 ppb
2019-05-18448181010.700 ppb
2019-05-18448179010.700 ppb
2019-05-18448178010.500 ppb
2019-08-13455665011.20 ppb
2019-08-13455664011.30 ppb
2019-08-13455663011.20 ppb
2019-08-13455662011.40 ppb
2019-11-1847277801ND
2019-11-1847277901ND
2019-11-1847278001ND
2019-11-1847277701ND