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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Truelight Redevelopment Grp #2

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.

 

38

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND50ND
2014ND60ND
20150.134 ppb81ND - 1.07 ppb
20160.146 ppb71ND - 1.02 ppb
2017ND80ND

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
2012-02-16120217-015THND
2012-04-18120419-005THND
2012-08-13120814-019THND
2012-11-07121108-002THND
2013-03-06130307-001THND
2013-04-29130430-012THND
2013-07-29130730-007THND
2013-11-18131119-014THND
2013-11-18131119-013THND
2014-02-10140211-007THND
2014-02-10140211-008THND
2014-08-11140812-010THND
2014-08-11140812-009THND
2014-11-10141111-004THND
2014-11-10141111-003THND
2015-02-09150210-006THND
2015-02-09150210-005TH1.07 ppb
2015-05-11150512-010THND
2015-05-11150512-009THND
2015-08-10150811-012THND
2015-08-10150811-011THND
2015-11-12151113-008THND
2015-11-12151113-007THND
2016-02-09160211-001THND
2016-02-09160211-002THND
2016-05-10160511-004TH1.02 ppb
2016-05-10160511-003THND
2016-08-09160810-015THND
2016-11-09161110-007THND
2016-11-09161110-008THND
2017-02-14170215-002THND
2017-02-14170215-001THND
2017-05-09170510-006THND
2017-05-09170510-005THND
2017-09-12170913-007THND
2017-09-12170913-006THND
2017-11-16171117-009THND
2017-11-16171117-008THND