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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

Penn State Univ.

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.

 

37

Samples

0

Samples exceeding legal limit (MCL)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.31 ppb440.800 ppb - 1.74 ppb
20131.35 ppb87ND - 3.21 ppb
20140.661 ppb1610ND - 1.58 ppb
20151.000 ppb220.590 ppb - 1.41 ppb
20160.453 ppb42ND - 0.950 ppb
20170.383 ppb31ND - 1.15 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
2012-08-152H150541.15 ppb
2012-08-152H150541.55 ppb
2012-08-152H150540.800 ppb
2012-08-152H150541.74 ppb
2013-08-123H120381.89 ppb
2013-08-123H120380.810 ppb
2013-08-123H120381.84 ppb
2013-08-123H120381.60 ppb
2013-11-133K13069-013.21 ppb
2013-11-133K13069-030.870 ppb
2013-11-133K13069-02ND
2013-11-133K13069-040.560 ppb
2014-02-134B13064-01ND
2014-02-134B13064-03ND
2014-02-134B13064-02ND
2014-02-134B13064-040.880 ppb
2014-05-154E15061-010.540 ppb
2014-05-154E15061-020.590 ppb
2014-05-154E15061-041.30 ppb
2014-05-154E15061-03ND
2014-08-144H14120-011.000 ppb
2014-08-144H14120-021.29 ppb
2014-08-144H14120-041.58 ppb
2014-08-144H14120-030.900 ppb
2014-11-134K13101-04ND
2014-11-134K13101-03ND
2014-11-134K13101-011.50 ppb
2014-11-134K13101-021.000 ppb
2015-02-12124469970.590 ppb
2015-08-13131851021.41 ppb
2016-02-2513917133ND
2016-08-2514804555ND
2016-09-02149755480.950 ppb
2016-11-23152826710.860 ppb
2017-03-13158505471.15 ppb
2017-08-2416629496ND
2017-11-2217077352ND