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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Lafe Regional Water Distribution District

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND20ND
20161.50 ppb32ND - 2.40 ppb
20171.05 ppb21ND - 2.10 ppb
20181.34 ppb220.880 ppb - 1.80 ppb
20190.407 ppb220.0642 ppb - 0.750 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
2014-01-2714030000702ND
2014-06-1814171002902ND
2014-06-1814171003002ND
2015-01-2015022007701ND
2015-05-2715148001202ND
2016-02-1616049006601ND
2016-05-02161260047022.40 ppb
2016-10-31163080052032.11 ppb
2017-01-0917012007101ND
2017-05-08171300060022.10 ppb
2018-01-09180120013010.880 ppb
2018-05-29181510006021.80 ppb
2019-02-19190520085010.750 ppb
2019-09-17192630003030.0642 ppb