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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Pico WD

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

 

141

Samples

0

Samples exceeding legal limit (MCL)

81

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.44 ppb2415ND - 4.70 ppb
20151.03 ppb2313ND - 3.50 ppb
20161.05 ppb2413ND - 4.40 ppb
20170.891 ppb2312ND - 3.40 ppb
20180.979 ppb2414ND - 3.90 ppb
20190.813 ppb2314ND - 2.10 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
2014-01-069588-011-0745ND
2014-02-119588-800-08231.90 ppb
2014-02-119588-801-09533.70 ppb
2014-02-119588-802-11182.70 ppb
2014-02-119588-803-10441.40 ppb
2014-03-209588-002-0930ND
2014-03-209588-004-0936ND
2014-03-209588-006-1000ND
2014-03-209588-009-1008ND
2014-05-139588-800-08171.40 ppb
2014-05-139588-801-08431.40 ppb
2014-05-139588-802-11154.20 ppb
2014-05-139588-803-10381.10 ppb
2014-06-209588-011-0950ND
2014-08-139588-800-13132.50 ppb
2014-08-139588-801-12331.40 ppb
2014-08-139588-802-11374.70 ppb
2014-08-139588-803-10561.50 ppb
2014-08-229588-011-1005ND
2014-10-239588-011-0940ND
2014-11-129588-800-08251.50 ppb
2014-11-129588-801-08571.40 ppb
2014-11-129588-802-12213.80 ppb
2014-11-129588-803-1111ND
2015-02-109588-800-07501.70 ppb
2015-02-109588-801-09101.50 ppb
2015-02-109588-802-10553.50 ppb
2015-02-109588-803-10101.10 ppb
2015-03-189588-004-0831ND
2015-03-189588-006-0819ND
2015-03-189588-009-0806ND
2015-03-189588-011-0755ND
2015-05-129588-800-13511.80 ppb
2015-05-129588-801-09381.50 ppb
2015-05-129588-802-12122.40 ppb
2015-05-129588-803-1028ND
2015-06-229588-011-0837ND
2015-08-109588-800-07481.90 ppb
2015-08-109588-801-08322.40 ppb
2015-08-109588-802-12101.60 ppb
2015-08-109588-803-1027ND
2015-08-269588-011-0957ND
2015-11-099588-800-12581.60 ppb
2015-11-099588-801-11141.10 ppb
2015-11-099588-802-09581.60 ppb
2015-11-099588-803-1016ND
2015-12-239588-011-0823ND
2016-02-109588-800-07581.60 ppb
2016-02-109588-801-09431.50 ppb
2016-02-109588-802-12481.70 ppb
2016-02-109588-803-1043ND
2016-02-259588-011-0800ND
2016-03-149588-009-0915ND
2016-03-239588-004-0802ND
2016-03-239588-006-0816ND
2016-05-099588-011-0828ND
2016-05-249588-800-07481.70 ppb
2016-05-249588-801-09251.40 ppb
2016-05-249588-802-12414.40 ppb
2016-05-249588-803-1148ND
2016-08-109588-011-0825ND
2016-08-179588-800-0728ND
2016-08-179588-801-09321.60 ppb
2016-08-179588-802-12391.50 ppb
2016-08-179588-803-13001.20 ppb
2016-11-089588-800-07462.00 ppb
2016-11-089588-801-09301.60 ppb
2016-11-089588-802-13053.80 ppb
2016-11-089588-803-13361.10 ppb
2016-11-309588-011-0800ND
2016-12-229588-011-0837ND
2017-02-149588-800-08591.30 ppb
2017-02-149588-801-1058ND
2017-02-149588-802-13183.40 ppb
2017-02-149588-803-1238ND
2017-02-239588-011-0840ND
2017-03-209588-004-1000ND
2017-03-209588-006-0920ND
2017-03-209588-009-0910ND
2017-05-089588-011-0815ND
2017-05-099588-800-07541.80 ppb
2017-05-099588-801-0848ND
2017-05-099588-802-10351.10 ppb
2017-05-099588-803-0911ND
2017-08-079588-800-14301.80 ppb
2017-08-079588-801-13061.70 ppb
2017-08-079588-802-11181.000 ppb
2017-08-079588-803-12141.000 ppb
2017-08-249588-011-0924ND
2017-11-149588-800-11261.90 ppb
2017-11-149588-801-12543.00 ppb
2017-11-149588-802-10341.50 ppb
2017-11-149588-803-09011.000 ppb
2017-11-229588-011-0850ND
2018-02-139588-011-0900ND
2018-02-139588-800-07451.50 ppb
2018-02-139588-801-10161.30 ppb
2018-02-139588-802-12563.90 ppb
2018-02-139588-803-1128ND
2018-03-079588-004-0931ND
2018-03-079588-006-0853ND
2018-03-079588-009-0908ND
2018-05-149588-011-0835ND
2018-05-149588-800-07432.40 ppb
2018-05-149588-801-08381.40 ppb
2018-05-149588-802-1445ND
2018-05-149588-803-10431.30 ppb
2018-08-149588-800-12531.80 ppb
2018-08-149588-801-10151.30 ppb
2018-08-149588-802-12251.10 ppb
2018-08-149588-803-11041.70 ppb
2018-08-209588-011-0000ND
2018-08-209588-011-0830ND
2018-11-149588-011-0820ND
2018-11-199588-800-07462.40 ppb
2018-11-199588-801-09181.10 ppb
2018-11-199588-802-11021.10 ppb
2018-11-199588-803-10291.20 ppb
2019-02-119588-800-12201.60 ppb
2019-02-119588-801-10222.10 ppb
2019-02-119588-802-08171.20 ppb
2019-02-119588-803-09291.10 ppb
2019-03-259588-006-0830ND
2019-03-259588-009-0900ND
2019-03-259588-011-0800ND
2019-05-079588-011-0820ND
2019-05-099588-004-0746ND
2019-05-149588-800-13131.10 ppb
2019-05-149588-801-14191.000 ppb
2019-05-149588-802-13401.30 ppb
2019-05-149588-803-14021.10 ppb
2019-07-189588-009-0828ND
2019-08-149588-800-07401.40 ppb
2019-08-149588-801-0852ND
2019-08-149588-802-10111.10 ppb
2019-08-149588-803-09401.10 ppb
2019-10-319588-011-0850ND
2019-11-199588-800-08241.60 ppb
2019-11-199588-801-09391.40 ppb
2019-11-199588-802-12011.60 ppb
2019-11-199588-803-1119ND