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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City Corporation

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

 

101

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0588 ppb171ND - 1.000 ppb
20150.0556 ppb183ND - 0.384 ppb
2016ND160ND
2017ND170ND
20180.0422 ppb202ND - 0.498 ppb
2019ND130ND

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
2014-01-2014023005102ND
2014-02-1914051009101ND
2014-02-1914051009001ND
2014-02-1914051009201ND
2014-04-15141070094021.000 ppb
2014-04-1514107009302ND
2014-04-1514107009602ND
2014-04-1514107009502ND
2014-07-1614198014402ND
2014-07-1614198014302ND
2014-07-1614198014202ND
2014-07-1614198014502ND
2014-07-1614198014601ND
2014-11-1214316005702ND
2014-11-1214316005802ND
2014-11-1214316005602ND
2014-11-1214316005902ND
2015-02-1015043005502ND
2015-02-1015043005702ND
2015-02-1015043005802ND
2015-02-1015043005602ND
2015-05-1115134003602ND
2015-05-1115134003702ND
2015-05-1115134003502ND
2015-05-1115134003402ND
2015-07-2115204001409ND
2015-07-21152040014030.303 ppb
2015-08-1015225003502ND
2015-08-1015225003402ND
2015-08-1015225003602ND
2015-08-17152320015030.313 ppb
2015-10-20152950052030.384 ppb
2015-11-1215317003402ND
2015-11-1215317003302ND
2015-11-1215317003202ND
2016-02-0916042008902ND
2016-02-0916042009102ND
2016-02-0916042008802ND
2016-05-1016133007002ND
2016-05-1016133007102ND
2016-05-1016133007202ND
2016-06-1516167001802ND
2016-08-0316216004801ND
2016-08-0916223008502ND
2016-08-0916223008602ND
2016-08-0916223008402ND
2016-08-0916223008302ND
2016-11-0716314006002ND
2016-11-0716314006102ND
2016-11-0716314005802ND
2016-11-0716314005902ND
2017-01-3117033005502ND
2017-01-3117033005202ND
2017-01-3117033005402ND
2017-01-3117033005302ND
2017-05-2317145002102ND
2017-05-2317145001902ND
2017-05-2317145002002ND
2017-05-2317145002202ND
2017-08-0717222009202ND
2017-08-0717222009702ND
2017-08-0717222009102ND
2017-08-0717222009302ND
2017-08-0717222009601ND
2017-11-0717313010802ND
2017-11-0717313010702ND
2017-11-0717313010602ND
2017-11-0717313010502ND
2018-02-0618039007402ND
2018-02-0618039007702ND
2018-02-0618039007602ND
2018-02-0618039007502ND
2018-05-0118122002402ND
2018-05-0118122002302ND
2018-05-0118122002502ND
2018-05-0118122002602ND
2018-07-31182130015030.498 ppb
2018-07-3118213000802ND
2018-07-3118213000902ND
2018-07-3118213000602ND
2018-07-3118213001509ND
2018-07-3118213000702ND
2018-10-2218298002103ND
2018-10-2918305003402ND
2018-10-2918305003502ND
2018-10-2918305003702ND
2018-10-2918305003602ND
2018-11-20183250025010.346 ppb
2019-01-2919031009802ND
2019-01-2919031009602ND
2019-01-2919031009902ND
2019-01-2919031009702ND
2019-04-2219115009702ND
2019-04-2219115009502ND
2019-04-2219115009602ND
2019-04-2219115009802ND
2019-07-1019192010301ND
2019-07-2219206010202ND
2019-07-2219206010502ND
2019-07-2219206010302ND
2019-07-2219206010402ND