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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Joyce Water Supply

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.

 

54

Samples

0

Samples exceeding legal limit (MCL)

44

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND40ND
2014ND60ND
201532.9 ppb8827.6 ppb - 43.6 ppb
201638.5 ppb202028.9 ppb - 49.4 ppb
201738.7 ppb161615.5 ppb - 55.3 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
2013-08-311236779ND
2013-08-311236780ND
2013-08-311236779ND
2013-08-311236780ND
2014-02-24AD89380ND
2014-02-24AD89380ND
2014-08-141326299ND
2014-08-141326298ND
2014-08-141326299ND
2014-08-141326298ND
2015-08-28142309543.6 ppb
2015-08-28142309543.6 ppb
2015-08-28142309427.6 ppb
2015-08-28142309427.6 ppb
2015-12-11145096029.9 ppb
2015-12-11145096130.3 ppb
2015-12-11145096029.9 ppb
2015-12-11145096130.3 ppb
2016-02-18146868334.9 ppb
2016-02-18146868233.0 ppb
2016-02-18146868334.9 ppb
2016-02-18146868233.0 ppb
2016-05-17149209728.9 ppb
2016-05-17149209728.9 ppb
2016-05-17149209629.6 ppb
2016-05-17149209629.6 ppb
2016-08-09151420945.9 ppb
2016-08-09151420844.2 ppb
2016-08-09151420844.2 ppb
2016-08-09151420945.9 ppb
2016-11-08153939649.4 ppb
2016-11-08153939747.8 ppb
2016-11-08153939649.4 ppb
2016-11-08153939747.8 ppb
2016-11-21154307635.4 ppb
2016-11-21154307635.4 ppb
2016-11-21154307735.5 ppb
2016-11-21154307735.5 ppb
2017-02-163529608900138.8 ppb
2017-02-163529608900215.5 ppb
2017-02-163529608900215.5 ppb
2017-02-163529608900138.8 ppb
2017-05-083531161000155.3 ppb
2017-05-083531161000245.0 ppb
2017-05-083531161000155.3 ppb
2017-05-083531161000245.0 ppb
2017-08-103532983700232.9 ppb
2017-08-103532983700129.4 ppb
2017-08-103532983700129.4 ppb
2017-08-103532983700232.9 ppb
2017-11-133534835800148.8 ppb
2017-11-133534835800148.8 ppb
2017-11-133534835800243.5 ppb
2017-11-133534835800243.5 ppb