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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Community Water System

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

 

101

Samples

0

Samples exceeding legal limit (MCL)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.706 ppb179ND - 1.70 ppb
20150.0131 ppb141ND - 0.183 ppb
2016ND170ND
20170.0306 ppb171ND - 0.520 ppb
20180.0894 ppb193ND - 0.926 ppb
2019ND170ND

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
2014-02-1214044004402ND
2014-02-1214044004702ND
2014-02-1214044004602ND
2014-02-1214044004502ND
2014-03-0714066000301ND
2014-05-07141280062021.70 ppb
2014-05-0714128006102ND
2014-05-0714128006002ND
2014-05-0714128005902ND
2014-08-06142190082021.20 ppb
2014-08-06142190084021.10 ppb
2014-08-06142190085021.30 ppb
2014-08-06142190083021.10 ppb
2014-11-05143100087021.40 ppb
2014-11-05143100089021.60 ppb
2014-11-05143100086021.10 ppb
2014-11-05143100088021.50 ppb
2015-02-0315036002802ND
2015-04-22151130037030.183 ppb
2015-05-0615127009102ND
2015-05-0615127009402ND
2015-05-0615127009202ND
2015-05-0615127009302ND
2015-08-0515218002502ND
2015-08-0515218002402ND
2015-08-0515218002602ND
2015-08-0515218002302ND
2015-11-0215309005202ND
2015-11-0315309005302ND
2015-11-0315309005002ND
2015-11-0315309005102ND
2016-02-0316036003702ND
2016-02-0316036003602ND
2016-02-0316036003001ND
2016-02-0316036003402ND
2016-02-0316036003502ND
2016-05-0316126010002ND
2016-05-0316126010102ND
2016-05-0316126010202ND
2016-05-0316126009902ND
2016-08-0216217000302ND
2016-08-0216217002702ND
2016-08-0216217002802ND
2016-08-0216217002902ND
2016-11-0216308011002ND
2016-11-0216308010902ND
2016-11-0216308010802ND
2016-11-0216308010702ND
2017-01-18170190076010.520 ppb
2017-01-3117033008802ND
2017-01-3117033009002ND
2017-01-3117033008702ND
2017-01-3117033008902ND
2017-05-0317124004602ND
2017-05-0317124004402ND
2017-05-0317124004302ND
2017-05-0317124004502ND
2017-08-0217215011202ND
2017-08-0217215011002ND
2017-08-0217215011302ND
2017-08-0217215011102ND
2017-11-0717313006602ND
2017-11-0717313006502ND
2017-11-0717313006702ND
2017-11-0717313006802ND
2018-02-0618039005302ND
2018-02-0618039005402ND
2018-02-0618039005202ND
2018-02-0618039005502ND
2018-02-06180390049090.540 ppb
2018-02-06180390049030.926 ppb
2018-05-0218123010502ND
2018-05-0218123010702ND
2018-05-02181230101030.233 ppb
2018-05-0218123010402ND
2018-05-0218123010602ND
2018-08-0718221010102ND
2018-08-0718221010202ND
2018-08-0718221010002ND
2018-08-0718221010302ND
2018-11-0618311003302ND
2018-11-0618311003402ND
2018-11-0618311003502ND
2018-11-0618311005602ND
2019-02-0519038008101ND
2019-02-0519038008602ND
2019-02-0519038008402ND
2019-02-0519038008502ND
2019-02-0519038008702ND
2019-05-0719129010102ND
2019-05-0719129010002ND
2019-05-0719129010202ND
2019-05-0719129009902ND
2019-08-0619220011602ND
2019-08-0619220011902ND
2019-08-0619220011702ND
2019-08-0619220011802ND
2019-11-0519311013902ND
2019-11-0519311013702ND
2019-11-0519311014002ND
2019-11-0519311013802ND