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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Whitewater 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.

MORE ABOUT THIS CONTAMINANT

 

118

Samples

0

Samples exceeding legal limit (MCL)

46

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.658 ppb209ND - 4.40 ppb
20150.730 ppb2212ND - 2.50 ppb
20160.392 ppb2110ND - 1.60 ppb
20170.345 ppb196ND - 2.30 ppb
20180.370 ppb184ND - 4.20 ppb
20190.444 ppb185ND - 3.70 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
2014-03-04773349ND
2014-03-04773351ND
2014-03-04773353ND
2014-03-207761101.30 ppb
2014-04-16781216ND
2014-04-167812170.280 ppb
2014-04-167812190.380 ppb
2014-04-167812180.860 ppb
2014-07-15803184ND
2014-07-15803181ND
2014-07-158031820.860 ppb
2014-07-318074610.490 ppb
2014-07-318074590.680 ppb
2014-09-168192373.90 ppb
2014-09-168192384.40 ppb
2014-10-16826129ND
2014-10-16826128ND
2014-10-16826126ND
2014-10-16826125ND
2014-10-16826124ND
2015-02-18844244ND
2015-02-18844246ND
2015-02-18844250ND
2015-02-18844254ND
2015-02-188442522.50 ppb
2015-06-01863167ND
2015-06-01863173ND
2015-06-018631710.880 ppb
2015-06-018631701.20 ppb
2015-06-018631691.80 ppb
2015-08-25878845ND
2015-08-258788400.380 ppb
2015-08-258788430.910 ppb
2015-08-258788410.940 ppb
2015-08-258788390.960 ppb
2015-08-258788472.00 ppb
2015-08-258788462.10 ppb
2015-12-14897967ND
2015-12-14897968ND
2015-12-14897971ND
2015-12-148979730.490 ppb
2015-12-148979701.90 ppb
2016-01-19902193ND
2016-01-19902195ND
2016-01-199021940.240 ppb
2016-01-199021960.240 ppb
2016-01-199021970.450 ppb
2016-04-19916905ND
2016-04-199169041.000 ppb
2016-04-199169071.000 ppb
2016-05-27923840ND
2016-07-13933278ND
2016-07-13933279ND
2016-07-13933281ND
2016-07-13933283ND
2016-07-139332851.50 ppb
2016-07-139332841.60 ppb
2016-08-10938568ND
2016-10-11952769ND
2016-10-11952770ND
2016-10-119527740.270 ppb
2016-10-119527730.430 ppb
2016-10-119527721.50 ppb
2017-03-06976492ND
2017-03-06976496ND
2017-03-06976498ND
2017-03-06976507ND
2017-03-06976503ND
2017-06-06995762ND
2017-06-06995761ND
2017-06-06995759ND
2017-06-069957580.490 ppb
2017-07-241006693ND
2017-07-241006697ND
2017-07-2410066990.670 ppb
2017-07-2410066960.790 ppb
2017-07-2410066940.800 ppb
2017-07-2710073142.30 ppb
2017-11-281031083ND
2017-11-281031084ND
2017-11-281031088ND
2017-11-2810310861.50 ppb
2018-01-301039117ND
2018-01-301039121ND
2018-01-301039125ND
2018-01-3010391230.360 ppb
2018-04-231051374ND
2018-04-231051377ND
2018-04-231051378ND
2018-04-2310513754.20 ppb
2018-08-071072173ND
2018-08-071072174ND
2018-08-071072176ND
2018-08-071072177ND
2018-08-0710721720.500 ppb
2018-08-0710721711.60 ppb
2018-10-221088316ND
2018-10-221088317ND
2018-10-221088319ND
2018-10-221088320ND
2019-02-251106616ND
2019-02-251106608ND
2019-02-251106612ND
2019-02-2511066140.240 ppb
2019-04-231117103ND
2019-04-231117100ND
2019-04-231117102ND
2019-04-231117099ND
2019-08-261143692ND
2019-08-261143695ND
2019-08-261143696ND
2019-08-2611436980.210 ppb
2019-08-2611436970.940 ppb
2019-08-2611436932.90 ppb
2019-10-291158067ND
2019-10-291158070ND
2019-10-291158071ND
2019-10-2911580683.70 ppb