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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

Brewster 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.

 

68

Samples

0

Samples exceeding legal limit (MCL)

33

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.790 ppb110.790 ppb
20131.03 ppb41ND - 4.10 ppb
2014ND50ND
20150.634 ppb188ND - 2.20 ppb
20160.538 ppb1910ND - 2.80 ppb
20171.51 ppb2113ND - 7.80 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
2012-03-280.790 ppb
2013-03-13ND
2013-03-13ND
2013-03-13ND
2013-03-134.10 ppb
2014-03-11ND
2014-03-11ND
2014-03-11ND
2014-03-11ND
2014-03-11ND
2015-01-131.90 ppb
2015-01-13ND
2015-02-10ND
2015-02-10ND
2015-02-101.60 ppb
2015-02-101.90 ppb
2015-05-071.40 ppb
2015-05-07ND
2015-05-070.990 ppb
2015-05-07ND
2015-08-05ND
2015-08-050.550 ppb
2015-08-052.20 ppb
2015-08-05ND
2015-11-02ND
2015-11-020.870 ppb
2015-11-02ND
2015-11-02ND
2016-02-02ND
2016-02-020.520 ppb
2016-02-020.590 ppb
2016-02-020.630 ppb
2016-02-02ND
2016-02-02ND
2016-05-041.30 ppb
2016-05-041.30 ppb
2016-05-04ND
2016-05-04ND
2016-08-01ND
2016-08-01ND
2016-08-01ND
2016-08-010.680 ppb
2016-08-121.20 ppb
2016-11-080.650 ppb
2016-11-082.80 ppb
2016-11-08ND
2016-11-080.550 ppb
2017-01-11ND
2017-01-11ND
2017-01-110.990 ppb
2017-01-11ND
2017-01-13ND
2017-02-06ND
2017-02-060.820 ppb
2017-02-067.80 ppb
2017-02-061.20 ppb
2017-05-032.30 ppb
2017-05-03ND
2017-05-030.960 ppb
2017-05-03ND
2017-08-022.60 ppb
2017-08-020.790 ppb
2017-08-022.10 ppb
2017-08-02ND
2017-11-090.610 ppb
2017-11-091.10 ppb
2017-11-095.70 ppb
2017-11-094.80 ppb