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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

Cedar City Waterworks

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

19

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.30 ppb221.10 ppb - 1.50 ppb
20130.600 ppb21ND - 1.20 ppb
20140.525 ppb43ND - 0.900 ppb
20150.800 ppb220.600 ppb - 1.000 ppb
20160.333 ppb62ND - 1.10 ppb
20172.07 ppb330.600 ppb - 4.60 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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 Result
2012-09-181.10 ppb
2012-09-181.50 ppb
2013-08-221.20 ppb
2013-08-22ND
2014-08-26ND
2014-08-260.900 ppb
2014-11-260.600 ppb
2014-11-260.600 ppb
2015-09-150.600 ppb
2015-09-151.000 ppb
2016-06-140.900 ppb
2016-06-14ND
2016-06-14ND
2016-06-14ND
2016-06-14ND
2016-06-141.10 ppb
2017-05-150.600 ppb
2017-10-301.000 ppb
2017-10-304.60 ppb