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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Wvaw - Weston

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

 

98

Samples

0

Samples exceeding legal limit (MCL)

53

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.606 ppb1615ND - 0.800 ppb
20150.231 ppb166ND - 0.700 ppb
20160.225 ppb166ND - 0.700 ppb
20170.319 ppb167ND - 0.900 ppb
20180.367 ppb189ND - 1.000 ppb
20190.444 ppb1610ND - 1.000 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
2014-03-1025023301ND
2014-03-10250232010.600 ppb
2014-03-10250231010.500 ppb
2014-03-10250230010.500 ppb
2014-06-10258859010.700 ppb
2014-06-10258858010.700 ppb
2014-06-10258857010.600 ppb
2014-06-10258856010.700 ppb
2014-09-10270083010.600 ppb
2014-09-10270082010.700 ppb
2014-09-10270084010.700 ppb
2014-09-10270085010.700 ppb
2014-12-10277033010.700 ppb
2014-12-10277032010.800 ppb
2014-12-10277031010.600 ppb
2014-12-10277030010.600 ppb
2015-03-1228368801ND
2015-03-1228368701ND
2015-03-1228368601ND
2015-03-1228368501ND
2015-06-1029210801ND
2015-06-1029210901ND
2015-06-1029211101ND
2015-06-1029211001ND
2015-09-11301215010.600 ppb
2015-09-11301214010.700 ppb
2015-09-1130121301ND
2015-09-1130121201ND
2015-12-10307675010.600 ppb
2015-12-10307674010.600 ppb
2015-12-10307673010.600 ppb
2015-12-10307672010.600 ppb
2016-03-1431492401ND
2016-03-1431492301ND
2016-03-14314925010.600 ppb
2016-03-14314926010.500 ppb
2016-06-1432364701ND
2016-06-14323646010.600 ppb
2016-06-1432364501ND
2016-06-1432364401ND
2016-09-1233191601ND
2016-09-1233191501ND
2016-09-2733691001ND
2016-09-2733690901ND
2016-12-06340162010.600 ppb
2016-12-06340161010.700 ppb
2016-12-0634016001ND
2016-12-06340159010.600 ppb
2017-03-0834884001ND
2017-03-0834883901ND
2017-03-0834883801ND
2017-03-0834883701ND
2017-06-1235736201ND
2017-06-1235736101ND
2017-06-1235736001ND
2017-06-1235735901ND
2017-09-13369594010.600 ppb
2017-09-13369593010.700 ppb
2017-09-13369592010.500 ppb
2017-09-1336959101ND
2017-12-11379081010.900 ppb
2017-12-11379078010.900 ppb
2017-12-11379079010.600 ppb
2017-12-11379080010.900 ppb
2018-03-1238845201ND
2018-03-1238845101ND
2018-03-1238845001ND
2018-03-1238844901ND
2018-06-0739771801ND
2018-06-0739771701ND
2018-06-0739771601ND
2018-06-0739771501ND
2018-06-25403444010.500 ppb
2018-06-25403443010.500 ppb
2018-09-04409267010.700 ppb
2018-09-04409266010.800 ppb
2018-09-0440926501ND
2018-09-04409264010.700 ppb
2018-12-10422197010.900 ppb
2018-12-10422196011.000 ppb
2018-12-10422195010.600 ppb
2018-12-10422194010.900 ppb
2019-03-1243435401ND
2019-03-1243435501ND
2019-03-12434356010.500 ppb
2019-03-1243435701ND
2019-06-11445657010.500 ppb
2019-06-11445656010.600 ppb
2019-06-1144565501ND
2019-06-11445654010.500 ppb
2019-09-09462853010.500 ppb
2019-09-09462852010.500 ppb
2019-09-0946285101ND
2019-09-0946285001ND
2019-12-09476728011.000 ppb
2019-12-09476731011.000 ppb
2019-12-09476730011.000 ppb
2019-12-09476729011.000 ppb