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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Monrovia Water Department

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)

54

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.748 ppb218ND - 3.00 ppb
20150.962 ppb2113ND - 3.00 ppb
20161.07 ppb2111ND - 4.80 ppb
20170.576 ppb218ND - 2.10 ppb
20180.600 ppb237ND - 3.10 ppb
20190.548 ppb217ND - 2.10 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
2014-01-319588-800-1015ND
2014-01-319588-801-10302.40 ppb
2014-01-319588-802-1000ND
2014-01-319588-803-1045ND
2014-04-309588-800-08401.10 ppb
2014-04-309588-801-08502.30 ppb
2014-04-309588-802-0945ND
2014-04-309588-803-08251.40 ppb
2014-07-079588-002-0910ND
2014-07-079588-003-0900ND
2014-07-079588-004-0940ND
2014-07-079588-005-0930ND
2014-07-079588-008-0925ND
2014-07-319588-800-1015ND
2014-07-319588-801-10453.00 ppb
2014-07-319588-802-0950ND
2014-07-319588-803-11001.80 ppb
2014-10-319588-800-0910ND
2014-10-319588-801-09202.00 ppb
2014-10-319588-802-1005ND
2014-10-319588-803-09001.70 ppb
2015-01-299588-800-07551.30 ppb
2015-01-299588-801-08102.10 ppb
2015-01-299588-802-08551.10 ppb
2015-01-299588-803-07451.60 ppb
2015-04-309588-800-0955ND
2015-04-309588-801-10051.60 ppb
2015-04-309588-802-0800ND
2015-04-309588-803-10201.20 ppb
2015-07-159588-002-0955ND
2015-07-159588-003-0930ND
2015-07-159588-004-0920ND
2015-07-159588-005-0910ND
2015-07-159588-008-0945ND
2015-07-319588-800-07551.10 ppb
2015-07-319588-801-08101.80 ppb
2015-07-319588-802-09101.20 ppb
2015-07-319588-803-07453.00 ppb
2015-10-299588-800-07501.30 ppb
2015-10-299588-801-08151.40 ppb
2015-10-299588-802-1115ND
2015-10-299588-803-08301.50 ppb
2016-01-289588-800-0815ND
2016-01-289588-801-08251.40 ppb
2016-01-289588-802-10402.40 ppb
2016-01-289588-803-08001.000 ppb
2016-04-289588-800-08201.80 ppb
2016-04-289588-801-08301.70 ppb
2016-04-289588-802-0830ND
2016-04-289588-803-08101.90 ppb
2016-07-139588-002-0920ND
2016-07-139588-003-0910ND
2016-07-139588-005-0930ND
2016-07-139588-008-0905ND
2016-07-289588-800-0810ND
2016-07-289588-801-08254.80 ppb
2016-07-289588-802-0910ND
2016-07-289588-803-07552.10 ppb
2016-10-289588-800-08101.10 ppb
2016-10-289588-801-08201.30 ppb
2016-10-289588-802-0905ND
2016-10-289588-803-07552.90 ppb
2016-12-199588-004-0905ND
2017-01-309588-800-08001.20 ppb
2017-01-309588-801-08101.40 ppb
2017-01-309588-802-0910ND
2017-01-309588-803-07451.000 ppb
2017-04-289588-800-0825ND
2017-04-289588-801-08102.10 ppb
2017-04-289588-802-0910ND
2017-04-289588-803-0745ND
2017-07-319588-800-0820ND
2017-07-319588-801-08401.40 ppb
2017-07-319588-802-0915ND
2017-07-319588-803-08551.40 ppb
2017-08-079588-002-0950ND
2017-08-079588-003-0905ND
2017-08-079588-005-0940ND
2017-08-079588-008-1000ND
2017-10-179588-004-0920ND
2017-10-319588-800-0810ND
2017-10-319588-801-08201.60 ppb
2017-10-319588-802-0930ND
2017-10-319588-803-07552.00 ppb
2018-01-319588-801-08301.80 ppb
2018-01-319588-802-0925ND
2018-01-319588-803-08001.20 ppb
2018-02-209588-800-0755ND
2018-04-109588-002-0850ND
2018-04-109588-008-0920ND
2018-04-279588-800-0745ND
2018-04-279588-801-07551.50 ppb
2018-04-279588-802-0900ND
2018-04-279588-803-07352.20 ppb
2018-07-129588-002-0950ND
2018-07-129588-003-0915ND
2018-07-129588-005-0925ND
2018-07-129588-008-0905ND
2018-07-309588-800-0800ND
2018-07-309588-801-08153.10 ppb
2018-07-309588-802-0910ND
2018-07-309588-803-07452.50 ppb
2018-10-039588-004-0945ND
2018-10-309588-800-0830ND
2018-10-309588-801-08451.50 ppb
2018-10-309588-802-0930ND
2018-10-309588-803-0820ND
2019-01-299588-800-0830ND
2019-01-299588-801-08401.90 ppb
2019-01-299588-802-0935ND
2019-01-299588-803-08151.70 ppb
2019-04-299588-800-08201.000 ppb
2019-04-299588-801-08301.60 ppb
2019-04-299588-802-0915ND
2019-04-299588-803-0805ND
2019-07-169588-002-1055ND
2019-07-169588-003-1105ND
2019-07-169588-005-1035ND
2019-07-169588-008-1115ND
2019-07-299588-800-0730ND
2019-07-299588-801-07401.40 ppb
2019-07-299588-802-0830ND
2019-07-299588-803-07152.10 ppb
2019-10-219588-004-0825ND
2019-10-299588-800-0745ND
2019-10-299588-801-08001.80 ppb
2019-10-299588-802-0905ND
2019-10-299588-803-0735ND