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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

University Park

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

27

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.49 ppb1612ND - 3.60 ppb
20150.131 ppb162ND - 1.10 ppb
2016ND160ND
2017ND160ND
20181.10 ppb167ND - 3.92 ppb
20190.851 ppb166ND - 3.95 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
2014-02-28Q14067960041.80 ppb
2014-02-28Q14067960031.80 ppb
2014-02-28Q14067960022.10 ppb
2014-02-28Q14067960012.10 ppb
2014-04-15Q14121680041.50 ppb
2014-04-15Q14121680031.40 ppb
2014-04-15Q14121680021.50 ppb
2014-04-15Q14121680011.30 ppb
2014-07-03Q14259090023.60 ppb
2014-07-03Q14259090012.60 ppb
2014-07-03Q14259090032.40 ppb
2014-07-03Q14259090041.70 ppb
2014-11-05Q1454857005ND
2014-11-05Q1454857004ND
2014-11-05Q1454857003ND
2014-11-05Q1454857002ND
2015-01-26Q1502672005ND
2015-01-26Q15026720041.10 ppb
2015-01-26Q15026720031.000 ppb
2015-01-26Q1502672002ND
2015-06-09Q1521045001ND
2015-06-09Q1521045002ND
2015-06-09Q1521045004ND
2015-06-09Q1521045003ND
2015-09-04Q1534743004ND
2015-09-04Q1534743001ND
2015-09-04Q1534743003ND
2015-09-04Q1534743002ND
2015-12-08Q1548792004ND
2015-12-08Q1548792003ND
2015-12-08Q1548792002ND
2015-12-08Q1548792001ND
2016-02-03Q1604948002ND
2016-02-03Q1604948001ND
2016-02-03Q1604948003ND
2016-02-03Q1604948004ND
2016-04-27Q1616640004ND
2016-04-27Q1616640003ND
2016-04-27Q1616640002ND
2016-04-27Q1616640001ND
2016-08-02Q1632100004ND
2016-08-02Q1632100003ND
2016-08-02Q1632100002ND
2016-08-02Q1632100001ND
2016-11-02Q1647017002ND
2016-11-02Q1647017003ND
2016-11-02Q1647017001ND
2016-11-02Q1647017004ND
2017-01-24Q1703296002ND
2017-01-24Q1703296004ND
2017-01-24Q1703296001ND
2017-01-24Q1703296003ND
2017-04-12Q1715263004ND
2017-04-12Q1715263003ND
2017-04-12Q1715263002ND
2017-04-12Q1715263001ND
2017-07-26Q1730808003ND
2017-07-26Q1730808001ND
2017-07-26Q1730808002ND
2017-07-26Q1730808004ND
2017-11-10Q1757964002ND
2017-11-10Q1757964004ND
2017-11-10Q1757964001ND
2017-11-10Q1757964003ND
2018-02-07Q18050970053.92 ppb
2018-02-07Q18050970043.23 ppb
2018-02-07Q18050970033.26 ppb
2018-02-07Q1805097002ND
2018-05-02Q1817805004ND
2018-05-02Q1817805001ND
2018-05-02Q1817805002ND
2018-05-02Q1817805003ND
2018-08-13Q1832238004ND
2018-08-13Q1832238001ND
2018-08-13Q1832238003ND
2018-08-13Q1832238002ND
2018-11-08Q18448820041.80 ppb
2018-11-08Q18448820021.92 ppb
2018-11-08Q18448820031.75 ppb
2018-11-08Q18448820011.75 ppb
2019-01-24Q1903747002ND
2019-01-24Q1903747004ND
2019-01-24Q1903747005ND
2019-01-24Q1903747003ND
2019-04-17Q19157860032.88 ppb
2019-04-17Q1915786002ND
2019-04-17Q1915786004ND
2019-04-17Q19157860013.95 ppb
2019-09-05Q1962655004ND
2019-09-05Q1962655003ND
2019-09-05Q1962655002ND
2019-09-05Q1962655001ND
2019-11-07Q19761330011.59 ppb
2019-11-07Q19761330041.63 ppb
2019-11-07Q19761330031.79 ppb
2019-11-07Q19761330021.77 ppb