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EWG's Tap Water Database — 2019 UPDATE

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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.

 

79

Samples

0

Samples exceeding legal limit (MCL)

15

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND210ND
20130.0812 ppb203ND - 0.647 ppb
20140.599 ppb95ND - 1.30 ppb
20150.610 ppb95ND - 1.30 ppb
20160.0858 ppb112ND - 0.498 ppb
2017ND90ND

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
2012-02-2112054001002ND
2012-02-2112054001802ND
2012-02-2112054000802ND
2012-02-2112054000702ND
2012-02-2112054000902ND
2012-04-1812111002002ND
2012-06-1212166000601ND
2012-06-1212166000801ND
2012-06-1212166000901ND
2012-06-1212166001701ND
2012-06-1212166000701ND
2012-08-1412229002102ND
2012-08-1412229001902ND
2012-08-1412229002902ND
2012-08-1412229002002ND
2012-08-1412229001802ND
2012-11-2012326000902ND
2012-11-2012326001202ND
2012-11-2012326001002ND
2012-11-2012326002202ND
2012-11-2012326001102ND
2013-01-17130180060030.476 ppb
2013-02-1813052005902ND
2013-02-1813052006002ND
2013-02-1813052005702ND
2013-02-1813052004902ND
2013-02-1813052005802ND
2013-04-09131020009030.647 ppb
2013-04-09131020009090.500 ppb
2013-05-1313136007202ND
2013-05-1313136008602ND
2013-05-1313136008702ND
2013-05-1313136008902ND
2013-05-1313136008502ND
2013-08-2113235002402ND
2013-08-2113235002202ND
2013-08-2113235002302ND
2013-08-2113235002602ND
2013-08-2113235001402ND
2013-11-1213317003802ND
2013-11-1213317003102ND
2014-02-2514059001502ND
2014-02-2514059000302ND
2014-04-07141000044010.590 ppb
2014-05-1314136003402ND
2014-05-1314136005102ND
2014-08-18142330069021.10 ppb
2014-08-18142330057021.10 ppb
2014-11-12143160067021.30 ppb
2014-11-12143160078021.30 ppb
2015-02-11150430018021.10 ppb
2015-02-11150430007021.30 ppb
2015-05-12151350020021.10 ppb
2015-05-12151350026010.890 ppb
2015-05-12151350025021.10 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
2016-10-1816294010402ND
2016-10-1816294009202ND
2017-01-1717019010502ND
2017-01-1717019011602ND
2017-04-2717118000901ND
2017-05-1017131000302ND
2017-05-1017131000402ND
2017-08-0817222012802ND
2017-08-0817222013602ND
2017-11-1417320008702ND
2017-11-1417320007702ND