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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Winchendon 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.

 

39

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND60ND
20160.0750 ppb81ND - 0.600 ppb
2017ND90ND
2018ND80ND
20190.0775 ppb81ND - 0.620 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
2015-01-13ND
2015-01-13ND
2015-04-14ND
2015-04-14ND
2015-07-14ND
2015-07-14ND
2016-01-12ND
2016-01-12ND
2016-04-12ND
2016-04-12ND
2016-07-12ND
2016-07-12ND
2016-10-11ND
2016-10-110.600 ppb
2017-01-10ND
2017-01-10ND
2017-04-11ND
2017-04-11ND
2017-07-11ND
2017-07-11ND
2017-10-03ND
2017-10-03ND
2017-12-12ND
2018-01-09ND
2018-01-09ND
2018-04-17ND
2018-04-17ND
2018-07-17ND
2018-07-17ND
2018-10-09ND
2018-10-09ND
2019-01-15ND
2019-01-15ND
2019-04-09ND
2019-04-09ND
2019-07-09ND
2019-07-09ND
2019-10-08ND
2019-10-080.620 ppb