Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dibromochloromethane

Chatsworth

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

 

113

Samples

0

Samples exceeding legal limit (MCL)

32

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.427 ppb186ND - 1.60 ppb
20150.259 ppb184ND - 1.50 ppb
20160.358 ppb195ND - 1.90 ppb
20170.411 ppb185ND - 2.00 ppb
20180.438 ppb187ND - 1.60 ppb
20190.285 ppb225ND - 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
2014-03-05AI29332ND
2014-03-05AI29333ND
2014-03-05AI293341.50 ppb
2014-03-05AI293351.10 ppb
2014-04-28AI38853ND
2014-04-28AI388540.580 ppb
2014-06-03AI42069ND
2014-06-03AI42070ND
2014-06-03AI420711.40 ppb
2014-06-03AI42072ND
2014-09-03AI52318ND
2014-09-03AI52319ND
2014-09-03AI523201.60 ppb
2014-09-03AI52321ND
2014-12-02AI60412ND
2014-12-02AI60413ND
2014-12-02AI604141.50 ppb
2014-12-02AI60415ND
2015-03-02AI65736ND
2015-03-02AI65737ND
2015-03-02AI65738ND
2015-03-02AI65739ND
2015-03-16AI69025ND
2015-03-16AI690260.760 ppb
2015-06-01AI78387ND
2015-06-01AI78388ND
2015-06-01AI783891.50 ppb
2015-06-01AI78390ND
2015-09-01AI88404ND
2015-09-01AI88405ND
2015-09-01AI884061.20 ppb
2015-09-01AI88407ND
2015-12-01AJ01787ND
2015-12-01AJ01788ND
2015-12-01AJ017891.20 ppb
2015-12-01AJ01790ND
2016-03-01AJ07229ND
2016-03-01AJ07230ND
2016-03-01AJ07231ND
2016-03-01AJ07232ND
2016-03-21AJ08416ND
2016-03-21AJ08417ND
2016-03-21AJ084181.000 ppb
2016-06-01AJ13198ND
2016-06-01AJ13199ND
2016-06-01AJ13200ND
2016-06-01AJ132011.000 ppb
2016-09-07AJ25987ND
2016-09-07AJ25988ND
2016-09-07AJ259891.90 ppb
2016-09-07AJ259901.50 ppb
2016-12-06AJ360431.40 ppb
2016-12-06AJ36044ND
2016-12-06AJ36045ND
2016-12-06AJ36046ND
2017-03-07AJ47649ND
2017-03-07AJ47650ND
2017-03-07AJ476512.00 ppb
2017-03-07AJ47652ND
2017-06-06AJ56860ND
2017-06-06AJ56861ND
2017-06-06AJ568621.60 ppb
2017-06-06AJ56863ND
2017-06-20AJ58059ND
2017-06-20AJ580601.30 ppb
2017-09-06AJ67132ND
2017-09-06AJ67133ND
2017-09-06AJ671341.20 ppb
2017-09-06AJ67135ND
2017-12-04AJ74588ND
2017-12-04AJ74589ND
2017-12-04AJ745901.30 ppb
2017-12-04AJ74591ND
2018-03-05AJ84932ND
2018-03-05AJ849331.000 ppb
2018-03-05AJ849341.10 ppb
2018-03-05AJ84935ND
2018-05-07AJ88817ND
2018-05-07AJ888180.780 ppb
2018-06-05AJ90745ND
2018-06-05AJ907461.10 ppb
2018-06-05AJ907471.10 ppb
2018-06-05AJ90748ND
2018-09-06AK00027ND
2018-09-06AK00028ND
2018-09-06AK000291.60 ppb
2018-09-06AK00030ND
2018-11-27AK06768ND
2018-11-27AK06769ND
2018-11-27AK067701.20 ppb
2018-11-27AK06771ND
2019-02-26AK12102ND
2019-02-26AK12103ND
2019-02-26AK12104ND
2019-02-26AK12105ND
2019-04-29AK15998ND
2019-04-29AK15999ND
2019-04-29AK160000.760 ppb
2019-05-14AK17445ND
2019-05-14AK174461.10 ppb
2019-05-14AK17447ND
2019-05-14AK17448ND
2019-05-20AK17838ND
2019-07-16AK22500ND
2019-09-03AK29085ND
2019-09-03AK29086ND
2019-09-03AK290871.90 ppb
2019-09-03AK290881.10 ppb
2019-10-14AK35010ND
2019-12-03AK37510ND
2019-12-03AK37511ND
2019-12-03AK375121.40 ppb
2019-12-03AK37513ND