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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Bridgestone MUD

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

 

110

Samples

0

Samples exceeding legal limit (MCL)

87

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.95 ppb1614ND - 3.00 ppb
20152.24 ppb1914ND - 6.00 ppb
20162.59 ppb1817ND - 4.60 ppb
20171.43 ppb1913ND - 3.90 ppb
20181.39 ppb1913ND - 2.90 ppb
20191.56 ppb1916ND - 3.50 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
2014-02-14AC430371.70 ppb
2014-02-14AC430822.00 ppb
2014-02-14AC430852.10 ppb
2014-02-14AC430361.80 ppb
2014-04-04AC495782.20 ppb
2014-04-04AC495892.30 ppb
2014-04-04AC496082.40 ppb
2014-06-09AC56305ND
2014-07-01AC586192.60 ppb
2014-07-01AC586132.70 ppb
2014-07-01AC586082.80 ppb
2014-07-01AC586093.00 ppb
2014-10-17AC700692.00 ppb
2014-10-17AC700651.80 ppb
2014-10-17AC700681.80 ppb
2014-10-17AC70067ND
2015-03-03AC82587ND
2015-03-03AC825125.00 ppb
2015-03-03AC825145.70 ppb
2015-03-03AC825165.90 ppb
2015-03-03AC825286.00 ppb
2015-04-17AC88843ND
2015-04-17AC888413.30 ppb
2015-04-17AC887832.60 ppb
2015-04-17AC887672.60 ppb
2015-04-17AC887632.60 ppb
2015-04-17AC887653.00 ppb
2015-08-14AD043201.20 ppb
2015-08-14AD042991.10 ppb
2015-08-14AD042941.20 ppb
2015-08-14AD04303ND
2015-11-24AD145381.000 ppb
2015-11-24AD145491.30 ppb
2015-11-24AD14548ND
2015-11-24AD14544ND
2016-02-19AD24409ND
2016-02-19AD247701.70 ppb
2016-02-19AD247141.50 ppb
2016-02-19AD247111.60 ppb
2016-02-19AD247192.60 ppb
2016-02-19AD247182.80 ppb
2016-06-10AD401652.60 ppb
2016-06-10AD401942.40 ppb
2016-06-10AD401642.60 ppb
2016-06-10AD401982.60 ppb
2016-09-30AD521673.60 ppb
2016-09-30AD521753.50 ppb
2016-09-30AD521794.60 ppb
2016-09-30AD521783.20 ppb
2016-12-06AD605922.40 ppb
2016-12-06AD605932.60 ppb
2016-12-06AD605903.10 ppb
2016-12-06AD605913.20 ppb
2017-01-27AD67543ND
2017-01-27AD675471.40 ppb
2017-01-27AD675151.10 ppb
2017-01-27AD675141.20 ppb
2017-01-27AD675161.30 ppb
2017-01-27AD675201.20 ppb
2017-04-28AD81836ND
2017-04-28AD817662.00 ppb
2017-04-28AD817652.30 ppb
2017-04-28AD81764ND
2017-04-28AD817631.10 ppb
2017-07-24AD902692.40 ppb
2017-07-24AD902673.90 ppb
2017-07-24AD90264ND
2017-07-24AD90266ND
2017-11-28AE059223.20 ppb
2017-11-28AE059192.80 ppb
2017-11-28AE059213.20 ppb
2017-11-28AE05920ND
2018-03-02AE16680ND
2018-03-02AE16593ND
2018-03-02AE165981.80 ppb
2018-03-02AE165991.30 ppb
2018-03-02AE166001.20 ppb
2018-05-21AE27028ND
2018-05-21AE27022ND
2018-05-21AE269542.80 ppb
2018-05-21AE269772.90 ppb
2018-05-21AE269621.70 ppb
2018-05-21AE269551.90 ppb
2018-07-27AE34854ND
2018-07-27AE348422.90 ppb
2018-07-27AE348521.10 ppb
2018-07-27AE34853ND
2018-10-19AE440812.30 ppb
2018-10-19AE440802.10 ppb
2018-10-19AE440782.20 ppb
2018-10-19AE440792.30 ppb
2019-01-11AE49599ND
2019-01-11AE49595ND
2019-02-22AE55667ND
2019-02-22AE556141.50 ppb
2019-02-22AE556151.60 ppb
2019-02-22AE556341.50 ppb
2019-02-22AE556331.40 ppb
2019-04-03AE610202.80 ppb
2019-04-03AE610213.00 ppb
2019-04-03AE610183.50 ppb
2019-04-03AE610193.40 ppb
2019-07-22AE753032.00 ppb
2019-07-22AE752861.30 ppb
2019-07-22AE752931.30 ppb
2019-07-22AE752801.20 ppb
2019-12-06AE916381.20 ppb
2019-12-06AE916551.30 ppb
2019-12-06AE916541.30 ppb
2019-12-06AE916391.30 ppb