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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Newton

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

73

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20145.23 ppb1612ND - 17.0 ppb
20157.08 ppb1612ND - 18.0 ppb
20167.33 ppb1612ND - 21.0 ppb
20176.23 ppb1613ND - 15.0 ppb
20186.64 ppb1612ND - 20.0 ppb
20196.41 ppb1612ND - 17.0 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 Lab ID Result
2014-02-10601321.73 ppb
2014-02-10600504.10 ppb
2014-02-1060042ND
2014-02-10600353.97 ppb
2014-05-05109976ND
2014-05-051099756.10 ppb
2014-05-051099742.10 ppb
2014-05-051099735.50 ppb
2014-08-1817599917.0 ppb
2014-08-18175998ND
2014-08-181760002.60 ppb
2014-08-1817600113.0 ppb
2014-11-1723308214.0 ppb
2014-11-1723308110.00 ppb
2014-11-17233080ND
2014-11-172330793.60 ppb
2015-02-23284218ND
2015-02-232842172.40 ppb
2015-02-232842165.80 ppb
2015-02-232842157.50 ppb
2015-05-183349953.20 ppb
2015-05-18334996ND
2015-05-183349989.30 ppb
2015-05-1833499713.0 ppb
2015-08-18390599ND
2015-08-183905979.20 ppb
2015-08-1839059518.0 ppb
2015-08-1839058913.0 ppb
2015-11-1742816511.0 ppb
2015-11-17428164ND
2015-11-174281635.90 ppb
2015-11-1742816215.0 ppb
2016-02-224971145.30 ppb
2016-02-224971137.20 ppb
2016-02-224971154.60 ppb
2016-02-22497116ND
2016-05-235514048.70 ppb
2016-05-23551403ND
2016-05-2355140221.0 ppb
2016-05-235514018.60 ppb
2016-08-22607948ND
2016-08-226079478.00 ppb
2016-08-2260794613.0 ppb
2016-08-2260794516.0 ppb
2016-11-07656978ND
2016-11-076569819.30 ppb
2016-11-076569804.50 ppb
2016-11-0765697911.0 ppb
2017-02-137082324.80 ppb
2017-02-13708231ND
2017-02-137082303.20 ppb
2017-02-137082296.90 ppb
2017-05-2376616415.0 ppb
2017-05-237661637.90 ppb
2017-05-23766162ND
2017-05-237661619.50 ppb
2017-08-2982977812.0 ppb
2017-08-29829777ND
2017-08-2982978013.0 ppb
2017-08-298297816.80 ppb
2017-11-148789687.60 ppb
2017-11-148789678.00 ppb
2017-11-148789662.70 ppb
2017-11-148789652.30 ppb
2018-02-129085552.50 ppb
2018-02-12908554ND
2018-02-129085534.30 ppb
2018-02-129085525.40 ppb
2018-05-219741825.20 ppb
2018-05-219741833.90 ppb
2018-05-21974185ND
2018-05-219741846.90 ppb
2018-08-13102516120.0 ppb
2018-08-131025160ND
2018-08-1310251596.50 ppb
2018-08-13102515819.0 ppb
2018-11-13107737814.0 ppb
2018-11-1310773775.50 ppb
2018-11-131077376ND
2018-11-13107737513.0 ppb
2019-02-0411145116.70 ppb
2019-02-0411145108.10 ppb
2019-02-0411145123.80 ppb
2019-02-041114513ND
2019-05-201157986ND
2019-05-2011579859.50 ppb
2019-05-2011579844.00 ppb
2019-05-2011579839.10 ppb
2019-08-13122323811.0 ppb
2019-08-1312232376.20 ppb
2019-08-13122323617.0 ppb
2019-08-131223235ND
2019-11-04127205212.0 ppb
2019-11-041272055ND
2019-11-0412720543.10 ppb
2019-11-04127205312.0 ppb