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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

Plymouth 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.

 

53

Samples

0

Samples exceeding legal limit (MCL)

31

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.24 ppb440.630 ppb - 1.67 ppb
20130.530 ppb110.530 ppb
20141.23 ppb43ND - 3.12 ppb
20150.749 ppb159ND - 2.20 ppb
20160.657 ppb148ND - 1.74 ppb
20170.405 ppb156ND - 1.76 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 Result
2012-01-051.09 ppb
2012-04-241.56 ppb
2012-10-090.630 ppb
2012-10-091.67 ppb
2013-10-230.530 ppb
2014-05-140.660 ppb
2014-11-24ND
2014-11-243.12 ppb
2014-11-241.12 ppb
2015-01-140.730 ppb
2015-08-192.13 ppb
2015-08-192.20 ppb
2015-08-190.790 ppb
2015-08-190.900 ppb
2015-11-241.09 ppb
2015-11-24ND
2015-11-240.600 ppb
2015-11-24ND
2015-11-24ND
2015-11-24ND
2015-11-241.63 ppb
2015-11-24ND
2015-11-241.17 ppb
2015-12-14ND
2016-08-171.57 ppb
2016-08-171.27 ppb
2016-08-170.540 ppb
2016-08-171.42 ppb
2016-10-05ND
2016-10-05ND
2016-10-05ND
2016-10-05ND
2016-10-050.530 ppb
2016-10-05ND
2016-10-051.07 ppb
2016-10-05ND
2016-10-051.06 ppb
2016-11-211.74 ppb
2017-01-240.510 ppb
2017-08-16ND
2017-08-160.640 ppb
2017-08-161.03 ppb
2017-08-161.76 ppb
2017-12-07ND
2017-12-070.520 ppb
2017-12-071.61 ppb
2017-12-07ND
2017-12-07ND
2017-12-07ND
2017-12-07ND
2017-12-07ND
2017-12-07ND
2017-12-07ND