Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dibromochloromethane

Pawc Watres

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

 

192

Samples

0

Samples exceeding legal limit (MCL)

176

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.697 ppb3231ND - 1.20 ppb
20150.694 ppb3231ND - 1.000 ppb
20160.697 ppb3231ND - 1.30 ppb
20170.528 ppb3223ND - 1.10 ppb
20180.769 ppb32320.600 ppb - 1.000 ppb
20190.816 ppb3228ND - 1.50 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
2014-01-07244039010.500 ppb
2014-01-07244034010.600 ppb
2014-01-07244035010.700 ppb
2014-01-07244036010.500 ppb
2014-01-07244038010.500 ppb
2014-01-07244040010.500 ppb
2014-01-07244037010.600 ppb
2014-01-0724404101ND
2014-04-08253324010.600 ppb
2014-04-08253317010.700 ppb
2014-04-08253320010.800 ppb
2014-04-08253321010.600 ppb
2014-04-08253323010.700 ppb
2014-04-08253325010.700 ppb
2014-04-08253322010.700 ppb
2014-04-08253326010.700 ppb
2014-07-15267498010.600 ppb
2014-07-15267493010.800 ppb
2014-07-15267494010.600 ppb
2014-07-15267495010.500 ppb
2014-07-15267497010.600 ppb
2014-07-15267499010.500 ppb
2014-07-15267496010.500 ppb
2014-07-15267500010.700 ppb
2014-10-07270968011.000 ppb
2014-10-07270963011.000 ppb
2014-10-07270964011.000 ppb
2014-10-07270965010.900 ppb
2014-10-07270967011.000 ppb
2014-10-07270969010.900 ppb
2014-10-07270966011.20 ppb
2014-10-07270970011.10 ppb
2015-01-06123000720.600 ppb
2015-01-06123000420.900 ppb
2015-01-06123000480.600 ppb
2015-01-0612300054ND
2015-01-06123000660.600 ppb
2015-01-06123000780.600 ppb
2015-01-06123000600.600 ppb
2015-01-06123000840.500 ppb
2015-04-07126452680.900 ppb
2015-04-07126452381.000 ppb
2015-04-07126452440.800 ppb
2015-04-07126452500.600 ppb
2015-04-07126452620.700 ppb
2015-04-07126452740.600 ppb
2015-04-07126452560.800 ppb
2015-04-07126452800.800 ppb
2015-07-07130256800.800 ppb
2015-07-07130256500.900 ppb
2015-07-07130256560.700 ppb
2015-07-07130256620.600 ppb
2015-07-07130256740.700 ppb
2015-07-07130256860.600 ppb
2015-07-07130256680.800 ppb
2015-07-07130256920.800 ppb
2015-10-07134019950.700 ppb
2015-10-07134019650.600 ppb
2015-10-07134019710.700 ppb
2015-10-07134019770.600 ppb
2015-10-07134019890.700 ppb
2015-10-07134020010.700 ppb
2015-10-07134019830.900 ppb
2015-10-07134020070.800 ppb
2016-01-06137665200.600 ppb
2016-01-06137664960.700 ppb
2016-01-06137665020.600 ppb
2016-01-06137665140.700 ppb
2016-01-06137665260.600 ppb
2016-01-06137665080.800 ppb
2016-01-06137665320.700 ppb
2016-01-07137664900.600 ppb
2016-04-07141195230.600 ppb
2016-04-07141194930.700 ppb
2016-04-07141194990.600 ppb
2016-04-0714119505ND
2016-04-07141195170.700 ppb
2016-04-07141195290.500 ppb
2016-04-07141195110.700 ppb
2016-04-07141195350.500 ppb
2016-07-07145878840.800 ppb
2016-07-07145878540.900 ppb
2016-07-07145878600.600 ppb
2016-07-07145878660.600 ppb
2016-07-07145878780.700 ppb
2016-07-07145878900.600 ppb
2016-07-07145878720.900 ppb
2016-07-07145878960.700 ppb
2016-10-12150923590.900 ppb
2016-10-12150923650.800 ppb
2016-10-12150923711.30 ppb
2016-10-12150923950.700 ppb
2016-10-13150923830.900 ppb
2016-10-13150923530.600 ppb
2016-10-13150923771.000 ppb
2016-10-13150923890.700 ppb
2017-01-11155328550.900 ppb
2017-01-11155328250.800 ppb
2017-01-11155328310.700 ppb
2017-01-11155328370.600 ppb
2017-01-11155328490.900 ppb
2017-01-11155328610.700 ppb
2017-01-11155328670.700 ppb
2017-01-12155328430.700 ppb
2017-04-10159546170.700 ppb
2017-04-10159545870.600 ppb
2017-04-1015954593ND
2017-04-1015954599ND
2017-04-1015954611ND
2017-04-1015954623ND
2017-04-1015954605ND
2017-04-1015954629ND
2017-07-1016429840ND
2017-07-1016429846ND
2017-07-10164298520.600 ppb
2017-07-10164298640.600 ppb
2017-07-10164298760.600 ppb
2017-07-1016429858ND
2017-07-10164298820.600 ppb
2017-07-11164298700.600 ppb
2017-10-10168960851.10 ppb
2017-10-10168960550.800 ppb
2017-10-10168960610.800 ppb
2017-10-10168960670.700 ppb
2017-10-10168960790.900 ppb
2017-10-10168960910.800 ppb
2017-10-10168960730.800 ppb
2017-10-10168960970.700 ppb
2018-01-09381565011.000 ppb
2018-01-09381560010.800 ppb
2018-01-09381561010.800 ppb
2018-01-09381562010.700 ppb
2018-01-09381564010.700 ppb
2018-01-09381566010.700 ppb
2018-01-09381563010.700 ppb
2018-01-09381567010.600 ppb
2018-04-10390679010.800 ppb
2018-04-10390674010.700 ppb
2018-04-10390675010.800 ppb
2018-04-10390676010.700 ppb
2018-04-10390678010.800 ppb
2018-04-10390680010.700 ppb
2018-04-10390677010.700 ppb
2018-04-10390681010.800 ppb
2018-07-09401983010.800 ppb
2018-07-09401984010.800 ppb
2018-07-09401985010.700 ppb
2018-07-09401987010.600 ppb
2018-07-09401989010.700 ppb
2018-07-09401986010.600 ppb
2018-07-09401990011.000 ppb
2018-07-10401988010.900 ppb
2018-10-08413065010.800 ppb
2018-10-08413066010.800 ppb
2018-10-08413067010.800 ppb
2018-10-08413069011.000 ppb
2018-10-08413071010.800 ppb
2018-10-08413068010.700 ppb
2018-10-08413072010.900 ppb
2018-10-09412250010.700 ppb
2019-01-07424941011.10 ppb
2019-01-07424936010.700 ppb
2019-01-07424937011.000 ppb
2019-01-07424938010.700 ppb
2019-01-07424940011.000 ppb
2019-01-07424942010.800 ppb
2019-01-07424939010.700 ppb
2019-01-07424943010.800 ppb
2019-04-09436540011.20 ppb
2019-04-09436541010.900 ppb
2019-04-09436546010.900 ppb
2019-04-09436547010.800 ppb
2019-04-09436548011.000 ppb
2019-04-09436543010.900 ppb
2019-04-09436544010.700 ppb
2019-04-09436545010.900 ppb
2019-07-08450100010.700 ppb
2019-07-0845010101ND
2019-07-08450105010.700 ppb
2019-07-0845010601ND
2019-07-08450107010.500 ppb
2019-07-0845010201ND
2019-07-0845010301ND
2019-07-08450104010.800 ppb
2019-10-07469146010.600 ppb
2019-10-07469147011.40 ppb
2019-10-07469148011.20 ppb
2019-10-07469149011.30 ppb
2019-10-07469150011.000 ppb
2019-10-07469151010.900 ppb
2019-10-07469152011.50 ppb
2019-10-08469145011.40 ppb