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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Lafayette

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.

 

132

Samples

0

Samples exceeding legal limit (MCL)

50

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.424 ppb349ND - 2.70 ppb
20130.838 ppb2614ND - 2.40 ppb
20140.783 ppb1810ND - 2.00 ppb
20150.272 ppb184ND - 1.50 ppb
20160.256 ppb184ND - 1.30 ppb
20170.639 ppb189ND - 1.60 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
2012-02-15AH53445ND
2012-02-15AH53446ND
2012-02-15AH53447ND
2012-02-15AH534481.10 ppb
2012-02-15AH53449ND
2012-02-15AH53450ND
2012-02-15AH53451ND
2012-02-15AH53452ND
2012-05-08AH59995ND
2012-05-08AH59996ND
2012-05-30AH65611ND
2012-05-30AH656121.80 ppb
2012-05-30AH65613ND
2012-05-30AH656141.20 ppb
2012-05-30AH65615ND
2012-05-30AH656161.10 ppb
2012-05-30AH65617ND
2012-05-30AH65618ND
2012-08-27AH75892ND
2012-08-27AH75893ND
2012-08-27AH758941.30 ppb
2012-08-27AH758951.60 ppb
2012-08-27AH75896ND
2012-08-27AH758972.40 ppb
2012-08-27AH75898ND
2012-08-27AH75899ND
2012-11-15AH84203ND
2012-11-15AH84204ND
2012-11-15AH84205ND
2012-11-15AH842061.20 ppb
2012-11-15AH84207ND
2012-11-15AH842082.70 ppb
2012-11-15AH84209ND
2012-11-15AH84210ND
2013-03-12AH90737ND
2013-03-12AH90738ND
2013-03-12AH90739ND
2013-03-12AH907401.10 ppb
2013-03-12AH90741ND
2013-03-12AH907421.40 ppb
2013-03-12AH90743ND
2013-03-12AH90744ND
2013-05-14AI01532ND
2013-05-14AI015331.30 ppb
2013-05-14AI01534ND
2013-05-14AI015351.60 ppb
2013-05-14AI01536ND
2013-05-14AI015372.00 ppb
2013-05-14AI01538ND
2013-05-14AI015391.20 ppb
2013-05-21AI020500.600 ppb
2013-05-21AI02051ND
2013-09-18AI16140ND
2013-09-18AI161411.40 ppb
2013-09-18AI161421.40 ppb
2013-09-18AI161431.70 ppb
2013-12-19AI254672.40 ppb
2013-12-19AI254681.90 ppb
2013-12-19AI254691.90 ppb
2013-12-19AI254701.90 ppb
2014-03-20AI364851.10 ppb
2014-03-20AI364861.30 ppb
2014-03-20AI364871.10 ppb
2014-03-20AI364881.10 ppb
2014-05-14AI40538ND
2014-05-14AI40539ND
2014-06-16AI433202.00 ppb
2014-06-16AI433211.30 ppb
2014-06-16AI433221.30 ppb
2014-06-16AI43323ND
2014-09-16AI540372.00 ppb
2014-09-16AI54038ND
2014-09-16AI540391.30 ppb
2014-09-16AI540401.60 ppb
2014-12-17AI61732ND
2014-12-17AI61733ND
2014-12-17AI61734ND
2014-12-17AI61735ND
2015-03-18AI69326ND
2015-03-18AI69327ND
2015-03-18AI69328ND
2015-03-18AI69329ND
2015-04-07AI74279ND
2015-04-07AI74280ND
2015-06-16AI79919ND
2015-06-16AI79920ND
2015-06-16AI79921ND
2015-06-16AI79922ND
2015-09-15AI898111.10 ppb
2015-09-15AI89812ND
2015-09-15AI89813ND
2015-09-15AI898141.20 ppb
2015-12-15AJ02945ND
2015-12-15AJ029461.10 ppb
2015-12-15AJ029471.50 ppb
2015-12-15AJ02948ND
2016-03-15AJ08200ND
2016-03-15AJ082011.10 ppb
2016-03-15AJ082021.10 ppb
2016-03-15AJ08203ND
2016-05-11AJ12002ND
2016-05-11AJ12003ND
2016-06-14AJ141461.10 ppb
2016-06-14AJ14147ND
2016-06-14AJ14148ND
2016-06-14AJ14149ND
2016-09-21AJ28481ND
2016-09-21AJ28482ND
2016-09-21AJ28483ND
2016-09-21AJ28484ND
2016-12-20AJ372441.30 ppb
2016-12-20AJ37245ND
2016-12-20AJ37246ND
2016-12-20AJ37247ND
2017-03-20AJ483471.20 ppb
2017-03-20AJ483481.10 ppb
2017-03-20AJ483491.10 ppb
2017-03-20AJ48350ND
2017-06-21AJ58195ND
2017-06-21AJ58196ND
2017-06-21AJ582131.60 ppb
2017-06-21AJ582141.50 ppb
2017-06-21AJ582151.10 ppb
2017-06-21AJ58216ND
2017-09-18AJ682941.50 ppb
2017-09-18AJ682951.20 ppb
2017-09-18AJ682961.20 ppb
2017-09-18AJ68297ND
2017-12-18AJ75637ND
2017-12-18AJ75638ND
2017-12-18AJ75639ND
2017-12-18AJ75640ND