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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Oklahoma University

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0343 ppb351ND - 1.20 ppb
2013ND20ND
20140.388 ppb82ND - 1.70 ppb
20150.125 ppb81ND - 1.000 ppb
20160.338 ppb82ND - 1.70 ppb
20170.400 ppb82ND - 1.90 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
2013-12-16038246.003ND
2013-12-16038246.001ND
2014-03-17040907.003ND
2014-03-17040907.001ND
2014-06-04044129.003ND
2014-06-04044129.001ND
2014-09-04047675.001ND
2014-09-04047675.003ND
2014-12-01051230.0031.70 ppb
2014-12-01051230.0011.40 ppb
2015-03-20054113.003ND
2015-03-20054113.0011.000 ppb
2015-06-10057347.003ND
2015-06-10057347.001ND
2015-09-10062561.003ND
2015-09-10062561.001ND
2015-12-09066277.003ND
2015-12-22066277.005ND
2016-03-14SDWA-1013303-00ND
2016-03-14SDWA-1013295-00ND
2016-06-02SDWA-1038499-00ND
2016-06-02SDWA-1038494-001.000 ppb
2016-09-20SDWA-1074550-00ND
2016-09-20SDWA-1071605-00ND
2016-12-08SDWA-1108047-00ND
2016-12-08SDWA-1108046-001.70 ppb
2017-03-08SDWA-1134795-03ND
2017-03-08SDWA-1134794-03ND
2017-06-14SDWA-1162332-03ND
2017-06-14SDWA-1162331-031.30 ppb
2017-08-31SDWA-1190068-03ND
2017-08-31SDWA-1190067-03ND
2017-12-11SDWA-1220387-03ND
2017-12-11SDWA-1220388-031.90 ppb