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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Plymouth Water Department

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.

 

54

Samples

0

Samples exceeding legal limit (MCL)

34

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.26 ppb440.550 ppb - 1.61 ppb
20130.957 ppb330.520 ppb - 1.57 ppb
20141.75 ppb440.540 ppb - 3.15 ppb
20151.22 ppb149ND - 4.48 ppb
20161.07 ppb148ND - 3.73 ppb
20171.01 ppb156ND - 5.22 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
2012-01-051.35 ppb
2012-04-241.51 ppb
2012-10-090.550 ppb
2012-10-091.61 ppb
2013-09-230.520 ppb
2013-10-230.780 ppb
2013-10-231.57 ppb
2014-05-140.540 ppb
2014-11-242.33 ppb
2014-11-243.15 ppb
2014-11-240.990 ppb
2015-08-193.06 ppb
2015-08-194.48 ppb
2015-08-191.31 ppb
2015-08-191.000 ppb
2015-11-240.860 ppb
2015-11-24ND
2015-11-241.01 ppb
2015-11-24ND
2015-11-24ND
2015-11-242.74 ppb
2015-11-24ND
2015-11-242.01 ppb
2015-11-240.640 ppb
2015-12-14ND
2016-08-173.46 ppb
2016-08-173.73 ppb
2016-08-171.35 ppb
2016-08-172.11 ppb
2016-10-05ND
2016-10-05ND
2016-10-05ND
2016-10-05ND
2016-10-050.670 ppb
2016-10-05ND
2016-10-050.700 ppb
2016-10-05ND
2016-10-050.910 ppb
2016-11-212.11 ppb
2017-01-24ND
2017-08-161.37 ppb
2017-08-161.46 ppb
2017-08-165.22 ppb
2017-08-164.17 ppb
2017-12-07ND
2017-12-071.08 ppb
2017-12-071.91 ppb
2017-12-07ND
2017-12-07ND
2017-12-07ND
2017-12-07ND
2017-12-07ND
2017-12-07ND
2017-12-07ND