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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Bryant Waterworks

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

56

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.32 ppb1613ND - 2.40 ppb
20151.46 ppb1615ND - 2.00 ppb
20160.663 ppb168ND - 1.60 ppb
20171.18 ppb1614ND - 1.90 ppb
20180.244 ppb163ND - 1.40 ppb
20190.283 ppb123ND - 1.30 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
2014-01-0814010002402ND
2014-01-08140100016021.10 ppb
2014-01-0814010001702ND
2014-01-0814010001502ND
2014-04-03140930083021.10 ppb
2014-04-03140930082021.10 ppb
2014-04-03140930081021.20 ppb
2014-04-03140930088021.10 ppb
2014-07-08141910013021.70 ppb
2014-07-08141910022021.40 ppb
2014-07-08141910023021.60 ppb
2014-07-08141910021021.60 ppb
2014-10-08142820029022.10 ppb
2014-10-08142820044022.40 ppb
2014-10-08142820034022.40 ppb
2014-10-08142820035022.30 ppb
2015-01-0715008016502ND
2015-01-07150080162021.80 ppb
2015-01-07150080163021.70 ppb
2015-01-07150080164021.60 ppb
2015-04-01150920092021.50 ppb
2015-04-01150920091021.60 ppb
2015-04-01150920093021.40 ppb
2015-04-01150920094021.000 ppb
2015-07-23152050051021.30 ppb
2015-07-23152050049021.20 ppb
2015-07-23152050052021.20 ppb
2015-07-23152050050021.30 ppb
2015-10-05152790009022.00 ppb
2015-10-05152790008022.00 ppb
2015-10-05152790006021.70 ppb
2015-10-05152790007022.00 ppb
2016-01-0816008014402ND
2016-01-0816008014502ND
2016-01-0816008014302ND
2016-01-0816008014202ND
2016-04-1916112006702ND
2016-04-1916112006602ND
2016-04-1916112006802ND
2016-04-1916112006902ND
2016-07-05161890018021.20 ppb
2016-07-05161890020021.10 ppb
2016-07-05161890019021.10 ppb
2016-07-05161890017021.10 ppb
2016-10-04162800149021.60 ppb
2016-10-04162800148021.50 ppb
2016-10-04162800146021.50 ppb
2016-10-04162800147021.50 ppb
2017-01-04170050079021.10 ppb
2017-01-04170050078021.10 ppb
2017-01-04170050077021.10 ppb
2017-01-0417005008002ND
2017-04-04170960021021.30 ppb
2017-04-04170960020021.20 ppb
2017-04-04170960019021.20 ppb
2017-04-04170960018021.000 ppb
2017-07-03171870128021.20 ppb
2017-07-03171870129021.30 ppb
2017-07-03171870127021.20 ppb
2017-07-0317187012602ND
2017-10-02172780148021.90 ppb
2017-10-02172780147021.80 ppb
2017-10-02172780146021.60 ppb
2017-10-02172780149021.80 ppb
2018-01-02180040013021.30 ppb
2018-01-0218004001002ND
2018-01-02180040012021.20 ppb
2018-01-02180040011021.40 ppb
2018-04-0218095015502ND
2018-04-0218095015602ND
2018-04-0218095015402ND
2018-04-0218095015702ND
2018-07-0218186018702ND
2018-07-0218186018902ND
2018-07-0218186019002ND
2018-07-0218186018802ND
2018-10-0218277011202ND
2018-10-0218277011302ND
2018-11-2818332000301ND
2018-11-2818332000201ND
2019-01-1019011001701ND
2019-01-1019011001801ND
2019-01-1019011001601ND
2019-01-1019011001501ND
2019-07-0919192011802ND
2019-07-0919192011702ND
2019-07-09191920119021.000 ppb
2019-07-0919192011402ND
2019-10-01192760077021.10 ppb
2019-10-01192760074021.30 ppb
2019-12-0919345007102ND
2019-12-0919345007002ND