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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

City of Long Beach

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

 

20

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.586 ppb124ND - 2.99 ppb
2015N/A00N/A
20160.343 ppb31ND - 1.03 ppb
2017ND20ND
20180.510 ppb21ND - 1.02 ppb
2019ND10ND

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
2014-01-21140122-010THND
2014-01-21140122-009TH1.48 ppb
2014-01-21140122-004THND
2014-01-21140122-003TH1.02 ppb
2014-04-21140422-008THND
2014-04-21140422-007TH2.99 ppb
2014-04-21140422-002THND
2014-04-21140422-001THND
2014-08-11140812-011THND
2014-08-11140812-012THND
2014-08-11140812-003TH1.54 ppb
2014-08-11140812-002THND
2016-06-22160623-003THND
2016-12-05161206-003THND
2016-12-05161206-002TH1.03 ppb
2017-07-31170801-004THND
2017-07-31170801-003THND
2018-07-16180717-024THND
2018-07-16180717-023TH1.02 ppb
2019-12-17191218-012THND