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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

City of Rosenberg

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.

MORE ABOUT THIS CONTAMINANT

 

35

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND70ND
2016ND60ND
2017ND70ND
2018ND70ND
20191.40 ppb51ND - 7.00 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
2014-01-21AC39520ND
2014-05-20AC54714ND
2014-05-20AC54717ND
2015-03-25AC86068ND
2015-03-25AC86064ND
2015-03-25AC86066ND
2015-03-25AC86058ND
2015-05-05AC90482ND
2015-05-05AC90568ND
2015-05-05AC90483ND
2016-01-26AD20142ND
2016-01-26AD20114ND
2016-01-26AD20110ND
2016-01-26AD20136ND
2016-08-04AD47062ND
2016-08-04AD47070ND
2017-03-14AD74917ND
2017-03-14AD74885ND
2017-03-14AD74943ND
2017-05-31AD86121ND
2017-05-31AD86120ND
2017-05-31AD86151ND
2017-05-31AD86153ND
2018-03-05AE16654ND
2018-03-05AE16660ND
2018-03-05AE16648ND
2018-03-05AE16646ND
2018-05-21AE26966ND
2018-05-21AE26967ND
2018-05-21AE27018ND
2019-04-02AE60883ND
2019-04-02AE60877ND
2019-04-02AE60873ND
2019-06-28AE72793ND
2019-06-28AE727897.00 ppb