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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Iowa-American Water Co-Clinton 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

 

25

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.500 ppb125ND - 2.80 ppb
20150.620 ppb51ND - 3.10 ppb
20161.90 ppb220.800 ppb - 3.00 ppb
20171.15 ppb221.000 ppb - 1.30 ppb
20180.900 ppb21ND - 1.80 ppb
20191.65 ppb21ND - 3.30 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
2014-01-132029885ND
2014-01-132029886ND
2014-01-1320298870.900 ppb
2014-01-132029888ND
2014-04-082046771ND
2014-04-082046772ND
2014-04-0820467731.10 ppb
2014-04-082046774ND
2014-07-0720653890.700 ppb
2014-07-0720653902.80 ppb
2014-07-072065391ND
2014-07-0720653880.500 ppb
2015-04-0128704701ND
2015-04-0628705501ND
2015-04-2228989401ND
2015-07-0129494201ND
2015-07-01294943013.10 ppb
2016-07-21327789010.800 ppb
2016-07-21327790013.00 ppb
2017-07-05361315011.30 ppb
2017-07-05361316011.000 ppb
2018-07-1240153601ND
2018-07-12401537011.80 ppb
2019-07-11449821013.30 ppb
2019-07-1144982201ND