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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Little Hocking Water/sewer Association

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

 

20

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0700 ppb101ND - 0.700 ppb
2015ND20ND
20160.440 ppb21ND - 0.880 ppb
20170.540 ppb21ND - 1.08 ppb
20180.400 ppb21ND - 0.800 ppb
20190.650 ppb220.600 ppb - 0.700 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
2014-02-06A140180152ND
2014-02-06A140180151ND
2014-02-06A140180150ND
2014-02-06A140180149ND
2014-05-06A140191331ND
2014-05-06A140191333ND
2014-05-06A140191332ND
2014-05-06A140191330ND
2014-08-14A1402168140.700 ppb
2014-08-14A140216813ND
2015-08-13A150319924ND
2015-08-13A150319925ND
2016-08-18A1604353400.880 ppb
2016-08-18A160435341ND
2017-07-20A170512436ND
2017-07-20A1705124371.08 ppb
2018-07-19A1806218360.800 ppb
2018-07-19A180621837ND
2019-08-159H02853-010.600 ppb
2019-08-159H02853-020.700 ppb