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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Darbonne Ws North

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

 

70

Samples

0

Samples exceeding legal limit (MCL)

42

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201410.9 ppb64ND - 19.3 ppb
20159.00 ppb42ND - 18.0 ppb
20161.29 ppb881.12 ppb - 1.61 ppb
20170.700 ppb188ND - 1.90 ppb
20181.32 ppb1814ND - 2.10 ppb
20190.520 ppb166ND - 1.70 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-07-08131565513.4 ppb
2014-07-08131565419.3 ppb
2014-07-08131565513.4 ppb
2014-07-08131565419.3 ppb
2014-12-01AE00107ND
2014-12-01AE00107ND
2015-07-071408338ND
2015-07-07140833718.0 ppb
2015-07-071408338ND
2015-07-07140833718.0 ppb
2016-08-1515164421.12 ppb
2016-08-1515164431.13 ppb
2016-08-1515164431.13 ppb
2016-08-1515164421.12 ppb
2016-11-0815397671.30 ppb
2016-11-0815397681.61 ppb
2016-11-0815397681.61 ppb
2016-11-0815397671.30 ppb
2017-02-0235292874003ND
2017-02-0235292874004ND
2017-02-0235292874004ND
2017-02-0235292874003ND
2017-05-1535312642002ND
2017-05-1535312642001ND
2017-05-1535312642001ND
2017-05-1535312642002ND
2017-08-10353298050041.20 ppb
2017-08-1035329805003ND
2017-08-10353298050041.20 ppb
2017-08-1035329805003ND
2017-11-15353491820031.90 ppb
2017-11-15353491820011.40 ppb
2017-11-15353491820021.80 ppb
2017-11-15353491820011.40 ppb
2017-11-15353491820021.80 ppb
2017-11-15353491820031.90 ppb
2018-02-26353765980031.60 ppb
2018-02-26353765980021.40 ppb
2018-02-2635376598001ND
2018-02-26353765980031.60 ppb
2018-02-26353765980021.40 ppb
2018-02-2635376598001ND
2018-05-29353952120021.80 ppb
2018-05-2935395212001ND
2018-05-29353952120021.80 ppb
2018-05-2935395212001ND
2018-08-16354120630022.10 ppb
2018-08-16354120630011.80 ppb
2018-08-16354120630022.10 ppb
2018-08-16354120630011.80 ppb
2018-11-19354323890021.70 ppb
2018-11-19354323890011.50 ppb
2018-11-19354323890011.50 ppb
2018-11-19354323890021.70 ppb
2019-02-25354509640021.70 ppb
2019-02-25354509640011.60 ppb
2019-02-25354509640011.60 ppb
2019-02-25354509640021.70 ppb
2019-05-2035470222002ND
2019-05-2035470222002ND
2019-05-2035470222001ND
2019-05-2035470222001ND
2019-08-1935492404002ND
2019-08-1935492404001ND
2019-08-1935492404001ND
2019-08-1935492404002ND
2019-11-1935514075001ND
2019-11-19355140750020.860 ppb
2019-11-1935514075001ND
2019-11-19355140750020.860 ppb