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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

Fort Bend County MUD 25

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)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
20130.150 ppb41ND - 0.600 ppb
20140.250 ppb21ND - 0.500 ppb
20151.85 ppb62ND - 9.40 ppb
20160.967 ppb62ND - 4.00 ppb
2017ND40ND

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
2012-03-20AB84532ND
2013-02-28AC117590.600 ppb
2013-05-09AC19037ND
2013-05-09AC19043ND
2013-05-09AC19046ND
2014-05-16AC54418ND
2014-05-16AC544550.500 ppb
2015-02-04AC79293ND
2015-02-04AC79295ND
2015-02-04AC792651.70 ppb
2015-02-04AC79289ND
2015-06-02AC94116ND
2015-06-02AC941689.40 ppb
2016-01-19AD18648ND
2016-01-19AD18642ND
2016-01-19AD186224.00 ppb
2016-06-21AD413531.80 ppb
2016-06-21AD41365ND
2016-08-02AD46709ND
2017-01-12AD64770ND
2017-01-12AD64784ND
2017-01-12AD64774ND
2017-05-19AD85046ND