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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Waterpro Inc

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.

 

78

Samples

0

Samples exceeding legal limit (MCL)

49

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.783 ppb64ND - 1.40 ppb
20130.375 ppb84ND - 1.10 ppb
20142.90 ppb1210ND - 10.8 ppb
20153.92 ppb1716ND - 11.1 ppb
20161.53 ppb1812ND - 5.30 ppb
20170.359 ppb173ND - 3.50 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 Result
2012-06-19ND
2012-06-19ND
2012-11-280.900 ppb
2012-11-281.20 ppb
2012-11-281.40 ppb
2012-11-281.20 ppb
2013-06-18ND
2013-06-18ND
2013-06-18ND
2013-06-18ND
2013-12-230.600 ppb
2013-12-231.10 ppb
2013-12-230.700 ppb
2013-12-230.600 ppb
2014-06-17ND
2014-06-170.500 ppb
2014-06-17ND
2014-06-170.600 ppb
2014-09-175.70 ppb
2014-09-175.50 ppb
2014-09-1710.8 ppb
2014-09-175.10 ppb
2014-12-171.40 ppb
2014-12-171.10 ppb
2014-12-171.60 ppb
2014-12-172.50 ppb
2015-03-241.20 ppb
2015-03-241.20 ppb
2015-03-241.30 ppb
2015-03-241.30 ppb
2015-06-228.60 ppb
2015-06-226.00 ppb
2015-06-226.90 ppb
2015-06-2211.1 ppb
2015-08-11ND
2015-09-224.60 ppb
2015-09-221.000 ppb
2015-09-224.40 ppb
2015-09-221.000 ppb
2015-12-092.60 ppb
2015-12-094.40 ppb
2015-12-094.20 ppb
2015-12-096.90 ppb
2016-03-171.60 ppb
2016-03-17ND
2016-03-171.000 ppb
2016-03-17ND
2016-06-06ND
2016-06-272.50 ppb
2016-06-272.20 ppb
2016-06-274.80 ppb
2016-06-271.40 ppb
2016-07-132.10 ppb
2016-09-215.30 ppb
2016-09-211.40 ppb
2016-09-213.50 ppb
2016-09-211.000 ppb
2016-12-12ND
2016-12-120.700 ppb
2016-12-12ND
2016-12-12ND
2017-03-13ND
2017-03-13ND
2017-03-13ND
2017-03-13ND
2017-06-191.60 ppb
2017-06-19ND
2017-06-19ND
2017-06-19ND
2017-07-19ND
2017-09-20ND
2017-09-203.50 ppb
2017-09-20ND
2017-09-201.000 ppb
2017-12-18ND
2017-12-18ND
2017-12-18ND
2017-12-18ND