Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dibromochloromethane

Carroll-Boone 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

 

58

Samples

0

Samples exceeding legal limit (MCL)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.599 ppb95ND - 1.30 ppb
20150.610 ppb95ND - 1.30 ppb
20160.0858 ppb112ND - 0.498 ppb
2017ND90ND
2018ND90ND
20190.0948 ppb112ND - 0.523 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
2014-02-2514059000302ND
2014-02-2514059001502ND
2014-04-07141000044010.590 ppb
2014-05-1314136003402ND
2014-05-1314136005102ND
2014-08-18142330069021.10 ppb
2014-08-18142330057021.10 ppb
2014-11-12143160078021.30 ppb
2014-11-12143160067021.30 ppb
2015-02-11150430018021.10 ppb
2015-02-11150430007021.30 ppb
2015-05-12151350025021.10 ppb
2015-05-12151350026010.890 ppb
2015-05-12151350020021.10 ppb
2015-07-2215205002002ND
2015-07-2215205000302ND
2015-11-2415329004002ND
2015-11-2415329003502ND
2016-02-03160360064030.446 ppb
2016-02-0916042006402ND
2016-02-0916042007102ND
2016-04-19161120091070.498 ppb
2016-04-1916112009104ND
2016-05-1916140014302ND
2016-05-1916140014202ND
2016-07-1816203007302ND
2016-07-1816203006602ND
2016-10-1816294009202ND
2016-10-1816294010402ND
2017-01-1717019010502ND
2017-01-1717019011602ND
2017-04-2717118000901ND
2017-05-1017131000402ND
2017-05-1017131000302ND
2017-08-0817222012802ND
2017-08-0817222013602ND
2017-11-1417320008702ND
2017-11-1417320007702ND
2018-01-1618018004502ND
2018-01-1618018004102ND
2018-04-1718109012302ND
2018-04-1718109012901ND
2018-04-1718109012202ND
2018-07-1718200008002ND
2018-07-1718200007102ND
2018-10-1518291011602ND
2018-10-1518291012902ND
2019-02-0419044000302ND
2019-02-1119044001002ND
2019-02-18190510005030.523 ppb
2019-04-2219115007602ND
2019-04-2219115007502ND
2019-04-2319115008703ND
2019-04-23191150087080.520 ppb
2019-07-2319205003502ND
2019-07-2319205003601ND
2019-10-2119297008702ND
2019-10-2119297008002ND