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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Crystal Clear WSC

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.

MORE ABOUT THIS CONTAMINANT

 

108

Samples

0

Samples exceeding legal limit (MCL)

86

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.80 ppb1713ND - 8.30 ppb
20154.70 ppb2113ND - 20.2 ppb
20167.08 ppb1916ND - 25.1 ppb
20174.32 ppb1412ND - 17.4 ppb
201812.2 ppb1916ND - 28.8 ppb
201913.3 ppb1816ND - 37.5 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 Lab ID Result
2014-03-17AC47107ND
2014-03-17AC471293.90 ppb
2014-03-17AC471063.90 ppb
2014-03-17AC471084.20 ppb
2014-05-16AC54551ND
2014-05-16AC545054.00 ppb
2014-05-16AC545554.00 ppb
2014-05-16AC545486.60 ppb
2014-07-23AC60742ND
2014-07-23AC607797.30 ppb
2014-07-23AC607817.10 ppb
2014-07-23AC607788.30 ppb
2014-09-04AC658451.000 ppb
2014-10-29AC70862ND
2014-10-29AC708644.00 ppb
2014-10-29AC708684.40 ppb
2014-10-29AC708675.90 ppb
2015-01-26AC77765ND
2015-01-26AC777532.40 ppb
2015-01-26AC777573.60 ppb
2015-01-26AC777454.60 ppb
2015-04-22AC89193ND
2015-04-22AC892053.20 ppb
2015-04-22AC891923.30 ppb
2015-04-22AC891944.10 ppb
2015-07-30AD01820ND
2015-07-30AD01810ND
2015-07-30AD01753ND
2015-07-30AD017506.60 ppb
2015-07-30AD017496.80 ppb
2015-07-30AD017486.60 ppb
2015-12-07AD157469.10 ppb
2015-12-07AD15742ND
2015-12-07AD15736ND
2015-12-07AD15682ND
2015-12-07AD1566515.5 ppb
2015-12-07AD1566920.2 ppb
2015-12-07AD1567812.6 ppb
2016-03-16AD29061ND
2016-03-16AD29065ND
2016-03-16AD290341.10 ppb
2016-03-16AD2903118.5 ppb
2016-03-16AD2903517.0 ppb
2016-03-16AD2902817.4 ppb
2016-04-08AD325061.50 ppb
2016-04-08AD3250715.5 ppb
2016-04-08AD3252025.1 ppb
2016-04-08AD325057.40 ppb
2016-06-07AD396281.60 ppb
2016-07-25AD45427ND
2016-07-25AD454235.00 ppb
2016-07-25AD453985.40 ppb
2016-07-25AD454094.90 ppb
2016-10-21AD545442.20 ppb
2016-10-21AD545535.10 ppb
2016-10-21AD545453.30 ppb
2016-10-21AD545513.50 ppb
2017-02-07AD69210ND
2017-02-07AD69216ND
2017-02-07AD691831.70 ppb
2017-02-07AD691823.00 ppb
2017-02-07AD691803.00 ppb
2017-02-07AD691842.30 ppb
2017-05-08AD829872.10 ppb
2017-05-08AD829842.90 ppb
2017-05-08AD829822.80 ppb
2017-05-08AD829792.30 ppb
2017-11-17AE053472.10 ppb
2017-11-17AE0535113.1 ppb
2017-11-17AE0535417.4 ppb
2017-11-17AE053507.80 ppb
2018-02-13AE13586ND
2018-02-13AE13582ND
2018-02-13AE135421.90 ppb
2018-02-13AE135419.70 ppb
2018-02-13AE1354012.5 ppb
2018-02-13AE135395.90 ppb
2018-06-12AE294471.50 ppb
2018-06-12AE2944218.6 ppb
2018-06-12AE2944122.7 ppb
2018-06-12AE2944911.0 ppb
2018-08-09AE36386ND
2018-08-09AE363064.00 ppb
2018-08-09AE3630220.2 ppb
2018-08-09AE3630325.9 ppb
2018-08-09AE3630414.8 ppb
2018-11-13AE459192.50 ppb
2018-11-13AE4591828.8 ppb
2018-11-13AE4591626.1 ppb
2018-11-13AE4591526.4 ppb
2019-01-28AE51626ND
2019-01-28AE51624ND
2019-03-13AE584182.10 ppb
2019-03-13AE5841936.0 ppb
2019-03-13AE5841437.5 ppb
2019-03-13AE5842033.8 ppb
2019-04-11AE620043.00 ppb
2019-04-11AE6199912.9 ppb
2019-04-11AE6199614.3 ppb
2019-04-11AE620229.00 ppb
2019-07-22AE753051.20 ppb
2019-07-22AE7530622.7 ppb
2019-07-22AE7530925.1 ppb
2019-07-22AE7530813.4 ppb
2019-11-22AE903841.70 ppb
2019-11-22AE903859.90 ppb
2019-11-22AE9038311.3 ppb
2019-11-22AE903866.30 ppb