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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

City of Roscoe

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.500 ppb110.500 ppb
2013ND30ND
2014ND20ND
2015ND20ND
2016ND20ND
2017ND20ND

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
2012-09-18AC013080.500 ppb
2013-06-04Q1301830004ND
2013-06-04Q1301830003ND
2013-06-04Q1301830005ND
2014-02-19Q1405564002ND
2014-05-06Q1414724003ND
2015-02-11Q1505776005ND
2015-08-04Q1530319002ND
2016-02-03Q1604694002ND
2016-06-21Q1625737002ND
2017-02-21Q1707285001ND
2017-05-16Q1719906003ND