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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Foxcroft School

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.

 

36

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.260 ppb51ND - 1.30 ppb
20150.350 ppb83ND - 1.70 ppb
20160.355 ppb114ND - 1.80 ppb
2017ND80ND
2018ND10ND
20190.533 ppb31ND - 1.60 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
2014-01-28E131205516ND
2014-04-10E140302161ND
2014-07-28E1406021321.30 ppb
2014-10-27E140904165ND
2014-10-27E140904166ND
2015-01-14VA010-DCLS0.500 ppb
2015-01-14VA010-DCLSND
2015-04-15VA010-DCLSND
2015-04-28VA010-DCLSND
2015-08-03VA010-DCLS1.70 ppb
2015-08-26VA010-DCLSND
2015-10-13VA010-DCLS0.600 ppb
2015-10-13VA010-DCLSND
2016-02-03E1601008280.800 ppb
2016-02-03E1601008240.700 ppb
2016-04-06E1602033820.600 ppb
2016-04-06E160203378ND
2016-07-25E1606015791.80 ppb
2016-07-25E160601592ND
2016-07-27E160601580ND
2016-10-19E160903973ND
2016-10-19E160903970ND
2016-10-19E160903980ND
2016-10-19E160903981ND
2017-02-01E161200822ND
2017-02-01E161200819ND
2017-05-15E170203789ND
2017-05-15E170203793ND
2017-08-15E170503920ND
2017-08-15E170503922ND
2017-11-28E170903299ND
2017-11-28E170903294ND
2018-03-26E171203487ND
2019-03-26E181206035ND
2019-09-10E1907063901.60 ppb
2019-09-10E190706394ND