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Dibromochloromethane

Forest Water Supply Corporation

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.

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20101.68 ppb441.30 ppb - 2.20 ppb
20110.250 ppb41ND - 1.000 ppb
20120.220 ppb51ND - 1.10 ppb
20131.01 ppb54ND - 1.40 ppb
20141.33 ppb881.10 ppb - 1.60 ppb
20150.833 ppb96ND - 1.51 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.1 ppb

The 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.

EPA Maximum Contaminant
Level Goal (MCLG)60.0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-03-1810035430031.30 ppb
2010-06-0710062170012.20 ppb
2010-09-3010100050011.70 ppb
2010-12-0810124040011.50 ppb
2011-02-0711021600021.000 ppb
2011-06-021106117001ND
2011-08-251108B23001ND
2011-12-141112570001ND
2012-01-241201555005ND
2012-01-2412015550031.10 ppb
2012-06-211206764001ND
2012-08-071208338001ND
2012-10-111210447001ND
2013-03-061303203002ND
2013-04-0213041310011.40 ppb
2013-07-16Q13038490021.26 ppb
2013-10-22Q13091710041.07 ppb
2013-10-22Q13091710031.31 ppb
2014-03-06Q14072350041.10 ppb
2014-03-06Q14072350031.30 ppb
2014-05-30Q14186000021.60 ppb
2014-05-30Q14186000011.40 ppb
2014-09-09Q14426920021.20 ppb
2014-09-09Q14426920011.30 ppb
2014-11-06Q14551360021.30 ppb
2014-11-06Q14551360011.40 ppb
2015-02-05Q1504709003ND
2015-02-05Q15047090011.20 ppb
2015-02-05Q1504709002ND
2015-06-08Q15207760021.21 ppb
2015-06-08Q15207760011.51 ppb
2015-09-01Q15335900021.14 ppb
2015-09-01Q15335900011.26 ppb
2015-12-04Q1548414002ND
2015-12-04Q15484140011.18 ppb