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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Harris County MUD 165

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

26

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20130.200 ppb31ND - 0.600 ppb
20141.25 ppb43ND - 2.50 ppb
20150.856 ppb94ND - 3.20 ppb
2016ND50ND
20170.680 ppb52ND - 2.30 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2013-06-13AC220990.600 ppb
2013-06-13AC22029ND
2013-06-13AC22097ND
2014-07-16AC59896ND
2014-07-16AC598902.50 ppb
2014-07-16AC598430.700 ppb
2014-07-16AC598471.80 ppb
2015-05-27AC934923.20 ppb
2015-05-27AC93485ND
2015-05-27AC934251.90 ppb
2015-05-27AC93397ND
2015-05-27AC93395ND
2015-09-09AD062571.20 ppb
2015-09-09AD06255ND
2015-11-10AD131881.40 ppb
2015-11-10AD13186ND
2016-03-21AD29673ND
2016-03-21AD29633ND
2016-03-21AD29639ND
2016-09-26AD51032ND
2016-09-26AD51035ND
2017-05-04AD827332.30 ppb
2017-05-04AD82713ND
2017-05-04AD827851.10 ppb
2017-05-04AD82787ND
2017-05-04AD82793ND