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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Hca Roan Filter Plant

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.

 

100

Samples

0

Samples exceeding legal limit (MCL)

76

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.720 ppb2010ND - 2.10 ppb
20130.663 ppb1611ND - 1.20 ppb
20140.913 ppb1610ND - 2.40 ppb
20151.18 ppb16160.600 ppb - 1.80 ppb
20161.19 ppb16160.600 ppb - 2.40 ppb
20170.688 ppb1613ND - 1.40 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
2012-01-30ND
2012-01-30ND
2012-01-3012020187ND
2012-01-3112020187ND
2012-02-2212021628ND
2012-02-22120216281.10 ppb
2012-02-2212021628ND
2012-02-2212021628ND
2012-04-09120407041.000 ppb
2012-04-09120407041.40 ppb
2012-04-09120407041.40 ppb
2012-04-09120407041.40 ppb
2012-07-18120721951.50 ppb
2012-07-18120721952.10 ppb
2012-07-18120721952.00 ppb
2012-07-18120721951.50 ppb
2012-10-2212101993-01ND
2012-10-2212101993-02ND
2012-10-2212101993-031.000 ppb
2012-10-2212101993-04ND
2013-01-1613011437-01ND
2013-01-1613011437-02ND
2013-01-1613011437-03ND
2013-01-1613011437-04ND
2013-04-1713042079-011.000 ppb
2013-04-1713042079-021.000 ppb
2013-04-1713042079-031.000 ppb
2013-04-1713042079-04ND
2013-07-08AA581770.800 ppb
2013-07-08AA581781.20 ppb
2013-07-08AA581791.000 ppb
2013-07-08AA581801.000 ppb
2013-11-201.10 ppb
2013-11-201.000 ppb
2013-11-200.800 ppb
2013-11-200.700 ppb
2014-02-2014021609-02ND
2014-02-2014021609-03ND
2014-02-2014021609-04ND
2014-02-2014021609-01ND
2014-05-2014052436-011.20 ppb
2014-05-2014052438-011.20 ppb
2014-05-2014052440-011.10 ppb
2014-05-2014052441-01ND
2014-08-2014082438-011.80 ppb
2014-08-2014082438-021.70 ppb
2014-08-2014082438-031.80 ppb
2014-08-2014082438-042.40 ppb
2014-11-2014112130-011.30 ppb
2014-11-2014112130-021.000 ppb
2014-11-2014112130-031.10 ppb
2014-11-2014112130-04ND
2015-02-19124135021.10 ppb
2015-02-19124135001.000 ppb
2015-02-19124135011.10 ppb
2015-02-19124135031.10 ppb
2015-05-20127634791.60 ppb
2015-05-20127634781.40 ppb
2015-05-20127634801.60 ppb
2015-05-20127634771.30 ppb
2015-08-19131479261.80 ppb
2015-08-19131479201.20 ppb
2015-08-19131479141.70 ppb
2015-08-19131479081.10 ppb
2015-11-19135268020.700 ppb
2015-11-19135267080.900 ppb
2015-11-19135267140.600 ppb
2015-11-19135267200.700 ppb
2016-02-22138816310.700 ppb
2016-02-22138816370.600 ppb
2016-02-22138816430.800 ppb
2016-02-22138816490.600 ppb
2016-05-18142663801.000 ppb
2016-05-18142663860.900 ppb
2016-05-18142663921.000 ppb
2016-05-18142663980.700 ppb
2016-08-19149256392.40 ppb
2016-08-19149256451.60 ppb
2016-08-19149256511.80 ppb
2016-08-19149256571.50 ppb
2016-11-18152408810.800 ppb
2016-11-18152408871.80 ppb
2016-11-18152408931.60 ppb
2016-11-18152408991.30 ppb
2017-02-22156698050.700 ppb
2017-02-22156698110.600 ppb
2017-02-22156698170.500 ppb
2017-02-22156698230.600 ppb
2017-05-18162736350.900 ppb
2017-05-18162736410.800 ppb
2017-05-18162736470.500 ppb
2017-05-18162736530.700 ppb
2017-08-23167422161.40 ppb
2017-08-23167422231.20 ppb
2017-08-23167422291.30 ppb
2017-08-23167422351.000 ppb
2017-11-2017037822ND
2017-11-2017037828ND
2017-11-2017037834ND
2017-11-20170378400.800 ppb