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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Iowa-American Water Co-Clinton District

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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

 

22

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.242 ppb123ND - 1.60 ppb
20151.45 ppb21ND - 2.90 ppb
20162.00 ppb220.900 ppb - 3.10 ppb
20170.700 ppb220.500 ppb - 0.900 ppb
20180.550 ppb21ND - 1.10 ppb
20190.950 ppb21ND - 1.90 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-01-1320298870.600 ppb
2014-01-132029888ND
2014-04-082046774ND
2014-04-0820467730.700 ppb
2014-04-082046772ND
2014-04-082046771ND
2014-07-072065389ND
2014-07-072065391ND
2014-07-0720653901.60 ppb
2014-07-072065388ND
2015-07-0129494201ND
2015-07-01294943012.90 ppb
2016-07-21327789010.900 ppb
2016-07-21327790013.10 ppb
2017-07-05361315010.900 ppb
2017-07-05361316010.500 ppb
2018-07-1240153601ND
2018-07-12401537011.10 ppb
2019-07-11449821011.90 ppb
2019-07-1144982201ND