Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dibromochloromethane

Leominster Water Division (MWRA)

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

 

114

Samples

0

Samples exceeding legal limit (MCL)

17

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND240ND
20160.115 ppb202ND - 1.20 ppb
20170.295 ppb205ND - 1.30 ppb
20180.219 ppb264ND - 1.80 ppb
20190.329 ppb206ND - 1.28 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
2014-04-08ND
2014-04-08ND
2014-04-08ND
2014-04-08ND
2015-01-28ND
2015-01-28ND
2015-01-28ND
2015-01-28ND
2015-03-31ND
2015-03-31ND
2015-03-31ND
2015-03-31ND
2015-04-07ND
2015-04-07ND
2015-04-07ND
2015-04-07ND
2015-04-28ND
2015-04-28ND
2015-04-28ND
2015-04-28ND
2015-07-28ND
2015-07-28ND
2015-07-28ND
2015-07-28ND
2015-10-27ND
2015-10-27ND
2015-10-27ND
2015-10-27ND
2016-01-26ND
2016-01-26ND
2016-01-26ND
2016-01-26ND
2016-04-05ND
2016-04-05ND
2016-04-05ND
2016-04-05ND
2016-04-27ND
2016-04-27ND
2016-04-27ND
2016-04-27ND
2016-07-26ND
2016-07-26ND
2016-07-26ND
2016-07-26ND
2016-10-251.10 ppb
2016-10-25ND
2016-10-25ND
2016-10-251.20 ppb
2017-01-251.30 ppb
2017-01-25ND
2017-01-25ND
2017-01-251.10 ppb
2017-04-26ND
2017-04-26ND
2017-04-26ND
2017-04-26ND
2017-04-26ND
2017-04-26ND
2017-04-26ND
2017-04-26ND
2017-07-251.20 ppb
2017-07-25ND
2017-07-251.000 ppb
2017-07-251.30 ppb
2017-10-24ND
2017-10-24ND
2017-10-24ND
2017-10-24ND
2018-01-24ND
2018-01-24ND
2018-01-24ND
2018-01-24ND
2018-04-11ND
2018-04-11ND
2018-04-11ND
2018-04-11ND
2018-04-11ND
2018-04-11ND
2018-04-11ND
2018-04-11ND
2018-08-30ND
2018-08-301.20 ppb
2018-08-301.20 ppb
2018-08-301.50 ppb
2018-10-24ND
2018-10-24ND
2018-10-24ND
2018-10-24ND
2018-10-25ND
2018-10-25ND
2018-10-25ND
2018-10-25ND
2018-10-25ND
2018-10-251.80 ppb
2019-01-23ND
2019-01-23ND
2019-01-23ND
2019-01-23ND
2019-04-04ND
2019-04-04ND
2019-04-04ND
2019-04-04ND
2019-04-09ND
2019-04-09ND
2019-04-09ND
2019-04-09ND
2019-07-171.28 ppb
2019-07-170.970 ppb
2019-07-170.990 ppb
2019-07-171.14 ppb
2019-10-091.000 ppb
2019-10-09ND
2019-10-09ND
2019-10-091.20 ppb