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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Brewster 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.

 

68

Samples

0

Samples exceeding legal limit (MCL)

42

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.730 ppb110.730 ppb
20130.825 ppb41ND - 3.30 ppb
2014ND50ND
20151.36 ppb1812ND - 4.20 ppb
20161.28 ppb1913ND - 5.00 ppb
20172.10 ppb2115ND - 7.70 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
2012-03-280.730 ppb
2013-03-13ND
2013-03-13ND
2013-03-13ND
2013-03-133.30 ppb
2014-03-11ND
2014-03-11ND
2014-03-11ND
2014-03-11ND
2014-03-11ND
2015-01-132.00 ppb
2015-01-13ND
2015-02-101.10 ppb
2015-02-10ND
2015-02-104.10 ppb
2015-02-103.10 ppb
2015-05-072.80 ppb
2015-05-07ND
2015-05-072.40 ppb
2015-05-070.600 ppb
2015-08-05ND
2015-08-051.30 ppb
2015-08-054.20 ppb
2015-08-050.680 ppb
2015-11-02ND
2015-11-021.60 ppb
2015-11-02ND
2015-11-020.670 ppb
2016-02-02ND
2016-02-021.40 ppb
2016-02-021.80 ppb
2016-02-021.90 ppb
2016-02-02ND
2016-02-02ND
2016-05-042.50 ppb
2016-05-043.00 ppb
2016-05-040.920 ppb
2016-05-04ND
2016-08-011.20 ppb
2016-08-01ND
2016-08-010.720 ppb
2016-08-011.70 ppb
2016-08-121.40 ppb
2016-11-081.50 ppb
2016-11-085.00 ppb
2016-11-08ND
2016-11-081.20 ppb
2017-01-11ND
2017-01-11ND
2017-01-110.660 ppb
2017-01-11ND
2017-01-13ND
2017-02-060.940 ppb
2017-02-062.20 ppb
2017-02-067.70 ppb
2017-02-063.60 ppb
2017-05-035.20 ppb
2017-05-030.960 ppb
2017-05-031.70 ppb
2017-05-03ND
2017-08-024.60 ppb
2017-08-020.650 ppb
2017-08-022.20 ppb
2017-08-02ND
2017-11-091.40 ppb
2017-11-091.10 ppb
2017-11-096.30 ppb
2017-11-094.80 ppb