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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Dublin

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

 

104

Samples

0

Samples exceeding legal limit (MCL)

96

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.99 ppb1714ND - 5.30 ppb
20152.26 ppb18180.500 ppb - 3.80 ppb
20161.85 ppb1712ND - 4.40 ppb
20172.99 ppb17172.10 ppb - 4.80 ppb
20183.38 ppb18181.000 ppb - 6.00 ppb
20192.72 ppb17171.50 ppb - 4.30 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
2014-03-05AI293241.50 ppb
2014-03-05AI293251.40 ppb
2014-03-05AI293261.40 ppb
2014-03-05AI293271.000 ppb
2014-04-01AI368981.40 ppb
2014-06-05AI423932.50 ppb
2014-06-05AI42394ND
2014-06-05AI423952.50 ppb
2014-06-05AI42396ND
2014-09-04AI524765.30 ppb
2014-09-04AI524772.30 ppb
2014-09-04AI524784.60 ppb
2014-09-04AI52479ND
2014-12-03AI605502.70 ppb
2014-12-03AI605512.20 ppb
2014-12-03AI605522.70 ppb
2014-12-03AI605532.30 ppb
2015-03-05AI684571.20 ppb
2015-03-05AI684581.000 ppb
2015-03-05AI684591.20 ppb
2015-03-05AI684601.20 ppb
2015-03-19AI694681.70 ppb
2015-03-19AI694690.500 ppb
2015-06-04AI789213.30 ppb
2015-06-04AI789223.10 ppb
2015-06-04AI789232.50 ppb
2015-06-04AI789242.00 ppb
2015-09-03AI887683.80 ppb
2015-09-03AI887693.80 ppb
2015-09-03AI887703.70 ppb
2015-09-03AI887713.80 ppb
2015-12-03AJ019552.30 ppb
2015-12-03AJ019561.70 ppb
2015-12-03AJ019572.10 ppb
2015-12-03AJ019581.80 ppb
2016-03-03AJ07530ND
2016-03-03AJ07531ND
2016-03-03AJ07532ND
2016-03-03AJ07533ND
2016-03-28AJ087791.20 ppb
2016-06-01AJ131272.70 ppb
2016-06-01AJ131282.60 ppb
2016-06-01AJ131292.60 ppb
2016-06-01AJ131301.80 ppb
2016-09-08AJ262574.40 ppb
2016-09-08AJ262584.20 ppb
2016-09-08AJ262594.10 ppb
2016-09-08AJ262603.30 ppb
2016-12-07AJ363251.70 ppb
2016-12-07AJ363261.30 ppb
2016-12-07AJ363271.60 ppb
2016-12-07AJ36328ND
2017-03-02AJ473222.20 ppb
2017-03-02AJ473232.20 ppb
2017-03-02AJ473242.20 ppb
2017-03-02AJ473252.50 ppb
2017-06-01AJ564183.20 ppb
2017-06-01AJ564192.40 ppb
2017-06-01AJ564202.90 ppb
2017-06-01AJ564212.60 ppb
2017-06-05AJ565522.80 ppb
2017-09-06AJ671264.80 ppb
2017-09-06AJ671274.30 ppb
2017-09-06AJ671284.70 ppb
2017-09-06AJ671294.20 ppb
2017-12-05AJ748112.90 ppb
2017-12-05AJ748122.30 ppb
2017-12-05AJ748132.50 ppb
2017-12-05AJ748142.10 ppb
2018-03-07AJ852053.10 ppb
2018-03-07AJ852062.30 ppb
2018-03-07AJ852073.10 ppb
2018-03-07AJ852081.80 ppb
2018-04-24AJ879851.90 ppb
2018-04-24AJ879861.000 ppb
2018-06-26AJ924865.50 ppb
2018-06-26AJ924874.70 ppb
2018-06-26AJ924884.80 ppb
2018-06-26AJ924894.30 ppb
2018-09-05AJ999036.00 ppb
2018-09-05AJ999044.60 ppb
2018-09-05AJ999055.60 ppb
2018-09-05AJ999064.00 ppb
2018-11-29AK069112.20 ppb
2018-11-29AK069121.90 ppb
2018-11-29AK069132.10 ppb
2018-11-29AK069142.00 ppb
2019-03-05AK125691.70 ppb
2019-03-05AK125701.70 ppb
2019-03-05AK125711.60 ppb
2019-03-05AK125721.50 ppb
2019-05-28AK183114.30 ppb
2019-05-28AK183123.50 ppb
2019-05-28AK183134.00 ppb
2019-05-28AK183143.50 ppb
2019-05-29AK184372.00 ppb
2019-09-04AK292073.80 ppb
2019-09-04AK292083.30 ppb
2019-09-04AK292093.60 ppb
2019-09-04AK292103.40 ppb
2019-12-04AK376012.40 ppb
2019-12-04AK376021.90 ppb
2019-12-04AK376032.30 ppb
2019-12-04AK376041.80 ppb