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Dibromochloromethane

Cedar City Waterworks

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20100.300 ppb52ND - 0.900 ppb
20110.0545 ppb111ND - 0.600 ppb
20121.25 ppb220.700 ppb - 1.80 ppb
20130.650 ppb220.600 ppb - 0.700 ppb
20140.875 ppb440.500 ppb - 1.20 ppb
20150.700 ppb220.700 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 Result
2010-08-12ND
2010-08-12ND
2010-09-140.600 ppb
2010-09-140.900 ppb
2010-09-14ND
2011-06-06ND
2011-09-07ND
2011-09-07ND
2011-09-07ND
2011-09-07ND
2011-09-07ND
2011-09-07ND
2011-09-070.600 ppb
2011-09-07ND
2011-09-07ND
2011-09-07ND
2012-09-180.700 ppb
2012-09-181.80 ppb
2013-08-220.700 ppb
2013-08-220.600 ppb
2014-08-260.600 ppb
2014-08-260.500 ppb
2014-11-261.20 ppb
2014-11-261.20 ppb
2015-09-150.700 ppb
2015-09-150.700 ppb