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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Cal-am Water Company - Duarte

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

 

165

Samples

0

Samples exceeding legal limit (MCL)

70

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.610 ppb3013ND - 2.10 ppb
20150.567 ppb3010ND - 2.70 ppb
20160.568 ppb3112ND - 2.00 ppb
20170.558 ppb248ND - 3.30 ppb
20181.11 ppb2313ND - 4.20 ppb
20191.24 ppb2714ND - 5.80 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
2014-01-319588-800-07551.20 ppb
2014-01-319588-801-08201.30 ppb
2014-01-319588-802-0810ND
2014-01-319588-803-07401.60 ppb
2014-03-109588-004-1140ND
2014-04-309588-800-09102.10 ppb
2014-04-309588-801-09351.40 ppb
2014-04-309588-802-0925ND
2014-04-309588-803-08001.20 ppb
2014-06-231225-002-1300ND
2014-06-231225-003-11101.30 ppb
2014-06-231225-007-10401.20 ppb
2014-06-231225-008-1235ND
2014-06-231225-009-1135ND
2014-06-231225-010-1330ND
2014-07-319588-800-11451.40 ppb
2014-07-319588-801-12001.20 ppb
2014-07-319588-802-1210ND
2014-07-319588-803-1125ND
2014-09-039588-002-1055ND
2014-09-039588-003-1215ND
2014-09-039588-007-1240ND
2014-09-039588-008-1120ND
2014-09-039588-010-1225ND
2014-10-319588-800-09351.80 ppb
2014-10-319588-801-09551.40 ppb
2014-10-319588-802-0945ND
2014-10-319588-803-10301.20 ppb
2014-12-039588-009-1100ND
2014-12-039588-019-1020ND
2015-01-299588-800-0820ND
2015-01-299588-801-0840ND
2015-01-299588-802-0830ND
2015-01-299588-803-07302.00 ppb
2015-04-309588-800-07501.50 ppb
2015-04-309588-801-07301.60 ppb
2015-04-309588-802-07401.10 ppb
2015-04-309588-803-10452.40 ppb
2015-07-319588-800-08301.90 ppb
2015-07-319588-801-0850ND
2015-07-319588-802-08401.40 ppb
2015-07-319588-803-0730ND
2015-09-089588-002-1200ND
2015-09-089588-003-1140ND
2015-09-089588-007-1215ND
2015-09-089588-008-1120ND
2015-09-089588-010-1110ND
2015-09-281225-003-1050ND
2015-09-281225-007-1200ND
2015-09-281225-008-1330ND
2015-09-281225-009-1345ND
2015-09-281225-010-0945ND
2015-10-141225-002-1205ND
2015-10-141225-019-0945ND
2015-10-299588-800-08401.30 ppb
2015-10-299588-801-09001.10 ppb
2015-10-299588-802-0850ND
2015-10-299588-803-07302.70 ppb
2015-12-079588-009-1130ND
2015-12-079588-019-1040ND
2016-01-289588-800-08401.40 ppb
2016-01-289588-801-0900ND
2016-01-289588-802-08501.000 ppb
2016-01-289588-803-07401.80 ppb
2016-04-289588-800-08501.70 ppb
2016-04-289588-801-09151.10 ppb
2016-04-289588-802-09051.50 ppb
2016-04-289588-803-07552.00 ppb
2016-06-201225-008-1145ND
2016-06-201225-010-1135ND
2016-06-201225-019-1115ND
2016-07-201225-002-1110ND
2016-07-201225-003-1000ND
2016-07-201225-007-0930ND
2016-07-201225-009-1030ND
2016-07-289588-800-08401.60 ppb
2016-07-289588-801-09001.10 ppb
2016-07-289588-802-0840ND
2016-07-289588-803-07301.80 ppb
2016-09-079588-002-1330ND
2016-09-079588-003-1305ND
2016-09-079588-007-1245ND
2016-09-079588-008-1345ND
2016-09-079588-010-1315ND
2016-09-121225-019-0850ND
2016-10-289588-800-08351.50 ppb
2016-10-289588-801-0855ND
2016-10-289588-802-08451.10 ppb
2016-10-289588-803-0735ND
2016-12-059588-009-1135ND
2016-12-059588-019-1105ND
2017-01-309588-800-08301.20 ppb
2017-01-309588-801-0850ND
2017-01-309588-802-0840ND
2017-01-309588-803-07301.50 ppb
2017-04-289588-800-08401.30 ppb
2017-04-289588-801-0900ND
2017-04-289588-802-0850ND
2017-04-289588-803-07301.50 ppb
2017-07-251225-009-1210ND
2017-07-319588-800-1605ND
2017-07-319588-801-1535ND
2017-07-319588-802-1550ND
2017-07-319588-803-15151.90 ppb
2017-09-209588-002-11501.20 ppb
2017-09-209588-007-1100ND
2017-09-209588-008-1125ND
2017-09-209588-010-1210ND
2017-09-289588-003-0905ND
2017-10-319588-800-08551.50 ppb
2017-10-319588-801-0925ND
2017-10-319588-802-0905ND
2017-10-319588-803-07403.30 ppb
2017-12-059588-009-1030ND
2017-12-059588-019-1000ND
2018-02-209588-800-08151.10 ppb
2018-02-209588-801-0840ND
2018-02-209588-802-08302.10 ppb
2018-02-209588-803-07401.20 ppb
2018-04-279588-800-08201.50 ppb
2018-04-279588-801-08401.90 ppb
2018-04-279588-802-08302.40 ppb
2018-04-279588-803-07202.70 ppb
2018-07-101225-009-0940ND
2018-07-309588-800-08351.20 ppb
2018-07-309588-801-0835ND
2018-07-309588-802-09004.20 ppb
2018-07-309588-803-08452.40 ppb
2018-09-209588-002-13001.70 ppb
2018-09-209588-007-1215ND
2018-09-209588-008-1240ND
2018-09-209588-010-1325ND
2018-10-309588-800-09001.30 ppb
2018-10-309588-801-0920ND
2018-10-309588-802-09101.90 ppb
2018-10-309588-803-0800ND
2018-12-189588-009-1150ND
2018-12-189588-019-1055ND
2019-01-299588-800-09002.20 ppb
2019-01-299588-801-09251.60 ppb
2019-01-299588-802-09153.60 ppb
2019-01-299588-803-08003.10 ppb
2019-02-069590-022-1230ND
2019-03-199588-003-1135ND
2019-04-299588-800-08502.60 ppb
2019-04-299588-801-09252.60 ppb
2019-04-299588-802-09055.80 ppb
2019-04-299588-803-07452.20 ppb
2019-05-139588-022-1310ND
2019-07-299588-800-08001.80 ppb
2019-07-299588-801-08202.10 ppb
2019-07-299588-802-08101.40 ppb
2019-07-299588-803-07002.20 ppb
2019-08-079588-002-1250ND
2019-08-079588-007-1145ND
2019-08-079588-008-1220ND
2019-08-079588-009-1210ND
2019-08-079588-010-1305ND
2019-08-079588-019-1115ND
2019-08-079588-022-1325ND
2019-10-299588-800-0820ND
2019-10-299588-801-08451.000 ppb
2019-10-299588-802-08351.30 ppb
2019-10-299588-803-0720ND
2019-11-199588-022-1040ND