Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Bromodichloromethane

Barrington

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.

 

23

Samples

0

Samples exceeding legal limit (MCL)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20130.612 ppb54ND - 1.07 ppb
20140.376 ppb126ND - 1.03 ppb
20150.612 ppb21ND - 1.22 ppb
20160.351 ppb21ND - 0.702 ppb
20170.579 ppb220.568 ppb - 0.589 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
2013-07-253080157-011.07 ppb
2013-10-163102695-01ND
2013-10-163102695-020.685 ppb
2013-10-163102695-040.655 ppb
2013-10-163102695-030.648 ppb
2014-02-034020626-01ND
2014-02-034020626-04ND
2014-02-034020626-02ND
2014-02-034020626-03ND
2014-04-164042955-030.825 ppb
2014-04-164042955-041.03 ppb
2014-04-164042955-020.678 ppb
2014-04-164042955-01ND
2014-07-174073847-02ND
2014-07-174073847-030.599 ppb
2014-07-174073847-010.858 ppb
2014-07-174073847-040.527 ppb
2015-07-215073938-01ND
2015-07-215073938-021.22 ppb
2016-07-146072742-01ND
2016-07-146072742-020.702 ppb
2017-07-187073365-010.568 ppb
2017-07-187073365-020.589 ppb