Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dibromochloromethane

Larchmont Utilities

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

 

53

Samples

0

Samples exceeding legal limit (MCL)

33

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.845 ppb129ND - 1.80 ppb
20151.14 ppb96ND - 4.30 ppb
20160.735 ppb106ND - 2.10 ppb
20170.810 ppb97ND - 2.40 ppb
20181.000 ppb53ND - 2.20 ppb
20190.525 ppb82ND - 2.20 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
2014-06-18AI435451.50 ppb
2014-06-18AI435441.30 ppb
2014-07-30AI476021.80 ppb
2014-07-30AI476010.700 ppb
2014-07-30AI476000.750 ppb
2014-07-30AI47491ND
2014-07-30AI47490ND
2014-07-30AI47489ND
2014-08-18AI501851.50 ppb
2014-08-18AI501840.830 ppb
2014-10-14AI575120.980 ppb
2014-10-14AI575110.780 ppb
2015-01-13AI627460.800 ppb
2015-01-13AI62745ND
2015-04-16AI750791.000 ppb
2015-04-16AI750780.990 ppb
2015-06-11AI795892.10 ppb
2015-06-11AI795881.10 ppb
2015-07-06AI81494ND
2015-07-06AI814934.30 ppb
2015-10-12AI92609ND
2016-01-19AJ04677ND
2016-01-19AJ046760.500 ppb
2016-01-19AJ04675ND
2016-06-08AJ138911.10 ppb
2016-06-08AJ13890ND
2016-07-07AJ16847ND
2016-07-07AJ168110.750 ppb
2016-07-07AJ168062.10 ppb
2016-07-07AJ168051.80 ppb
2016-10-28AJ323551.10 ppb
2017-03-21AJ485670.510 ppb
2017-03-21AJ485660.810 ppb
2017-03-21AJ485630.940 ppb
2017-03-21AJ48562ND
2017-03-21AJ48561ND
2017-03-21AJ485600.770 ppb
2017-04-07AJ528640.660 ppb
2017-08-21AJ654342.40 ppb
2017-08-21AJ654351.20 ppb
2018-02-28AJ85012ND
2018-02-28AJ85011ND
2018-03-01AJ850130.800 ppb
2018-07-18AJ948282.20 ppb
2018-07-18AJ948272.00 ppb
2019-03-05AK12808ND
2019-03-05AK12807ND
2019-03-05AK12806ND
2019-03-05AK12805ND
2019-07-17AK228672.20 ppb
2019-07-17AK228662.00 ppb
2019-07-17AK22860ND
2019-12-18AK38848ND