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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

Ward Nine Water System

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.

 

38

Samples

0

Samples exceeding legal limit (MCL)

32

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
20131.55 ppb84ND - 3.20 ppb
201411.6 ppb4410.2 ppb - 12.9 ppb
201515.2 ppb4413.4 ppb - 16.9 ppb
20169.47 ppb445.93 ppb - 13.0 ppb
201710.4 ppb16166.10 ppb - 14.7 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
2012-09-061147962ND
2012-09-061147962ND
2013-08-13L0033143-013.00 ppb
2013-08-13L0033143-023.20 ppb
2013-08-13L0033143-013.00 ppb
2013-08-13L0033143-023.20 ppb
2013-12-02AD87377ND
2013-12-02AD87376ND
2013-12-02AD87377ND
2013-12-02AD87376ND
2014-08-21132844410.2 ppb
2014-08-21132844512.9 ppb
2014-08-21132844410.2 ppb
2014-08-21132844512.9 ppb
2015-08-10141829916.9 ppb
2015-08-10141829916.9 ppb
2015-08-10141830013.4 ppb
2015-08-10141830013.4 ppb
2016-08-1215158815.93 ppb
2016-08-12151588213.0 ppb
2016-08-12151588213.0 ppb
2016-08-1215158815.93 ppb
2017-02-14352960860208.90 ppb
2017-02-14352960860196.10 ppb
2017-02-14352960860208.90 ppb
2017-02-14352960860196.10 ppb
2017-05-09353120270126.10 ppb
2017-05-09353120270117.50 ppb
2017-05-09353120270126.10 ppb
2017-05-09353120270117.50 ppb
2017-08-103532995004614.7 ppb
2017-08-103532995004614.7 ppb
2017-08-103532995004713.6 ppb
2017-08-103532995004713.6 ppb
2017-11-133534951100211.8 ppb
2017-11-133534951100114.2 ppb
2017-11-133534951100211.8 ppb
2017-11-133534951100114.2 ppb