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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

San Gabriel County WD

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

 

128

Samples

0

Samples exceeding legal limit (MCL)

38

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.513 ppb237ND - 3.10 ppb
20150.629 ppb218ND - 2.20 ppb
20160.386 ppb215ND - 2.10 ppb
20170.319 ppb215ND - 1.50 ppb
20180.438 ppb217ND - 1.60 ppb
20190.367 ppb216ND - 1.50 ppb

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
2014-01-239588-800-0900ND
2014-01-239588-801-13001.20 ppb
2014-01-239588-802-0845ND
2014-01-239588-803-1225ND
2014-04-089588-007-0940ND
2014-04-229588-800-0840ND
2014-04-229588-801-12001.80 ppb
2014-04-229588-802-0830ND
2014-04-229588-803-10451.40 ppb
2014-06-173761-020-1020ND
2014-07-149588-009-0900ND
2014-07-149588-010-0915ND
2014-07-149588-011-0945ND
2014-07-159588-001-1000ND
2014-07-239588-800-0820ND
2014-07-239588-801-08451.70 ppb
2014-07-239588-802-0830ND
2014-07-239588-803-09051.20 ppb
2014-10-239588-800-0905ND
2014-10-239588-801-12151.40 ppb
2014-10-239588-802-0850ND
2014-10-239588-803-12003.10 ppb
2014-12-059588-020-0910ND
2015-01-239588-800-0830ND
2015-01-239588-801-12052.20 ppb
2015-01-239588-802-0820ND
2015-01-239588-803-11301.50 ppb
2015-03-179588-020-1050ND
2015-04-229588-800-0830ND
2015-04-229588-801-1135ND
2015-04-229588-802-08151.20 ppb
2015-04-229588-803-1120ND
2015-06-119588-007-0905ND
2015-07-169588-001-0940ND
2015-07-169588-010-1000ND
2015-07-169588-011-1020ND
2015-07-239588-800-08351.20 ppb
2015-07-239588-801-12051.40 ppb
2015-07-239588-802-0820ND
2015-07-239588-803-11402.00 ppb
2015-10-269588-800-0830ND
2015-10-269588-801-11502.00 ppb
2015-10-269588-802-0820ND
2015-10-269588-803-11351.70 ppb
2016-01-269588-800-0850ND
2016-01-269588-801-12102.10 ppb
2016-01-269588-802-0840ND
2016-01-269588-803-11551.80 ppb
2016-04-139588-007-0940ND
2016-04-229588-800-0840ND
2016-04-229588-801-12101.70 ppb
2016-04-229588-802-0820ND
2016-04-229588-803-1135ND
2016-07-189588-009-0925ND
2016-07-189588-010-0935ND
2016-07-189588-011-0950ND
2016-07-269588-800-0835ND
2016-07-269588-801-11251.000 ppb
2016-07-269588-802-0825ND
2016-07-269588-803-1110ND
2016-09-159588-020-0910ND
2016-10-269588-800-0900ND
2016-10-269588-801-12051.50 ppb
2016-10-269588-802-0845ND
2016-10-269588-803-1150ND
2017-01-249588-800-0850ND
2017-01-249588-801-12101.20 ppb
2017-01-249588-802-0835ND
2017-01-249588-803-1150ND
2017-04-139588-007-0925ND
2017-04-249588-800-1355ND
2017-04-249588-801-13301.50 ppb
2017-04-249588-802-1345ND
2017-04-249588-803-13151.30 ppb
2017-07-179588-009-0905ND
2017-07-179588-010-0925ND
2017-07-179588-011-0945ND
2017-07-179588-020-1025ND
2017-07-279588-800-1405ND
2017-07-279588-801-1330ND
2017-07-279588-802-1345ND
2017-07-279588-803-1315ND
2017-10-249588-800-0840ND
2017-10-249588-801-12101.50 ppb
2017-10-249588-802-0830ND
2017-10-249588-803-11451.20 ppb
2018-01-249588-800-0900ND
2018-01-249588-801-11151.60 ppb
2018-01-249588-802-0850ND
2018-01-249588-803-11001.10 ppb
2018-04-069588-007-0930ND
2018-04-249588-800-0840ND
2018-04-249588-801-12401.40 ppb
2018-04-249588-802-0830ND
2018-04-249588-803-11301.000 ppb
2018-07-189588-009-1100ND
2018-07-189588-010-1045ND
2018-07-189588-011-1030ND
2018-07-189588-020-1010ND
2018-07-249588-800-08201.20 ppb
2018-07-249588-801-11351.50 ppb
2018-07-249588-802-0810ND
2018-07-249588-803-1115ND
2018-10-239588-800-0835ND
2018-10-239588-801-11501.40 ppb
2018-10-239588-802-0825ND
2018-10-239588-803-1125ND
2019-01-249588-800-0920ND
2019-01-249588-801-13151.000 ppb
2019-01-249588-802-13151.40 ppb
2019-01-249588-803-1245ND
2019-04-109588-007-1015ND
2019-04-239588-800-0830ND
2019-04-239588-801-11501.40 ppb
2019-04-239588-802-08201.000 ppb
2019-04-239588-803-1135ND
2019-07-129588-009-1045ND
2019-07-129588-010-1035ND
2019-07-129588-011-0950ND
2019-07-129588-020-1015ND
2019-07-239588-800-0810ND
2019-07-239588-801-09301.40 ppb
2019-07-239588-802-0755ND
2019-07-239588-803-1015ND
2019-10-239588-800-0830ND
2019-10-239588-801-12051.50 ppb
2019-10-239588-802-0820ND
2019-10-239588-803-1150ND