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EWG's Tap Water Database — 2019 UPDATE

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Dibromochloromethane

Matagorda County Water Control and Improvement District 5

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND10ND
2014ND10ND
2015ND20ND
20160.400 ppb31ND - 1.20 ppb
20170.360 ppb51ND - 1.80 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
2013-09-30AC31661ND
2014-08-12AC63211ND
2015-05-21AC92970ND
2015-05-21AC93033ND
2016-07-21AD451791.20 ppb
2016-07-21AD45259ND
2016-12-05AD60403ND
2017-02-08AD69628ND
2017-03-28AD77166ND
2017-05-18AD84846ND
2017-05-18AD848951.80 ppb
2017-07-31AD91407ND