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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Coloma 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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.950 ppb110.950 ppb
2015ND10ND
20160.630 ppb110.630 ppb
2017ND10ND
2018ND10ND
20190.200 ppb110.200 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 Lab ID Result
2014-08-208122090.950 ppb
2015-08-19878016ND
2016-09-219475830.630 ppb
2017-08-171012287ND
2018-08-221075753ND
2019-08-1411409460.200 ppb