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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Covington Water District

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

 

78

Samples

0

Samples exceeding legal limit (MCL)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0813 ppb162ND - 0.800 ppb
20150.250 ppb164ND - 1.40 ppb
20160.324 ppb179ND - 0.800 ppb
20170.1000 ppb122ND - 0.600 ppb
20180.0688 ppb81ND - 0.550 ppb
20190.490 ppb97ND - 0.720 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
2014-01-2873302ND
2014-01-28732990.500 ppb
2014-01-2873301ND
2014-01-2873300ND
2014-04-2573496ND
2014-04-2573499ND
2014-04-2573498ND
2014-04-2573497ND
2014-07-2473829ND
2014-07-2473831ND
2014-07-2473830ND
2014-07-2473832ND
2014-10-29744470.800 ppb
2014-10-2974448ND
2014-10-2974446ND
2014-10-2974445ND
2015-01-2274718ND
2015-01-2274717ND
2015-01-2274719ND
2015-01-2274720ND
2015-04-2274939ND
2015-04-2274940ND
2015-04-2274937ND
2015-04-2274938ND
2015-07-29752290.800 ppb
2015-07-29752280.600 ppb
2015-07-29752311.20 ppb
2015-07-29752301.40 ppb
2015-10-1575579ND
2015-10-1575580ND
2015-10-1575578ND
2015-10-1575581ND
2016-01-270.500 ppb
2016-01-27ND
2016-01-27ND
2016-01-270.600 ppb
2016-04-26ND
2016-04-260.500 ppb
2016-04-26ND
2016-04-26ND
2016-07-280.600 ppb
2016-07-280.600 ppb
2016-07-280.800 ppb
2016-07-280.700 ppb
2016-08-020.600 ppb
2016-10-27ND
2016-10-270.600 ppb
2016-10-27ND
2016-10-27ND
2017-01-26ND
2017-01-26ND
2017-01-26ND
2017-01-26ND
2017-04-27ND
2017-04-27ND
2017-04-27ND
2017-04-27ND
2017-07-27ND
2017-07-27ND
2017-10-170.600 ppb
2017-10-170.600 ppb
2018-01-23ND
2018-01-23ND
2018-04-24ND
2018-04-24ND
2018-07-27ND
2018-07-27ND
2018-10-230.550 ppb
2018-10-23ND
2019-01-290.500 ppb
2019-01-290.610 ppb
2019-04-230.590 ppb
2019-04-230.720 ppb
2019-07-250.690 ppb
2019-07-250.710 ppb
2019-07-29ND
2019-10-29ND
2019-10-290.590 ppb