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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Cooper

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.

MORE ABOUT THIS CONTAMINANT

 

30

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.08 ppb54ND - 1.70 ppb
2015ND50ND
2016ND50ND
20170.418 ppb51ND - 2.09 ppb
20180.446 ppb52ND - 1.23 ppb
2019ND50ND

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
2014-03-13Q14082640071.70 ppb
2014-03-13Q14082640021.18 ppb
2014-06-19Q1422289002ND
2014-09-24Q14476610021.40 ppb
2014-12-08Q14588540021.10 ppb
2015-02-17Q1506348002ND
2015-05-01Q1516200001ND
2015-06-03Q1520326006ND
2015-09-22Q1537152001ND
2015-10-15Q1540553002ND
2016-03-28Q1612449002ND
2016-03-28Q1612449003ND
2016-06-09Q1623301002ND
2016-09-20Q1639233002ND
2016-11-30Q1651973002ND
2017-03-14Q1710574002ND
2017-03-14Q1710574003ND
2017-05-24Q1721833001ND
2017-08-22Q1737507002ND
2017-11-16Q17591040022.09 ppb
2018-02-14Q18062340021.23 ppb
2018-05-24Q1820900002ND
2018-06-21Q1824879004ND
2018-08-09Q18319650011.000 ppb
2018-11-06Q1844312002ND
2019-02-28Q1908773001ND
2019-05-20Q1926757002ND
2019-09-13Q1964926002ND
2019-12-02Q1978461006ND
2019-12-02Q1978461005ND