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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Purcellville, Town of

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

47

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.281 ppb166ND - 1.30 ppb
20150.769 ppb169ND - 3.20 ppb
20160.556 ppb169ND - 1.60 ppb
20170.371 ppb147ND - 1.000 ppb
20180.344 ppb167ND - 1.000 ppb
20190.456 ppb189ND - 1.20 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
2014-02-26E131208339ND
2014-03-31E1312083320.700 ppb
2014-03-31E1312083400.800 ppb
2014-05-07E140304184ND
2014-05-07E1403041680.500 ppb
2014-06-10E140304185ND
2014-06-26E1403041700.500 ppb
2014-06-26E140304171ND
2014-07-31E140606696ND
2014-07-31E140606716ND
2014-08-21E140606715ND
2014-09-25E140606720ND
2014-11-18E140904326ND
2014-11-18E140904332ND
2014-12-16E1409043310.700 ppb
2014-12-16E1409043401.30 ppb
2015-03-02VA010-DCLS1.50 ppb
2015-03-02VA010-DCLS0.800 ppb
2015-03-26VA010-DCLSND
2015-05-06VA010-DCLS1.90 ppb
2015-05-06VA010-DCLS0.800 ppb
2015-05-21VA010-DCLSND
2015-06-10VA010-DCLSND
2015-07-30VA010-DCLSND
2015-07-30VA010-DCLSND
2015-08-06VA010-DCLS1.000 ppb
2015-08-13VA010-DCLS3.20 ppb
2015-08-13VA010-DCLS1.10 ppb
2015-11-09VA010-DCLS1.30 ppb
2015-11-09VA010-DCLS0.700 ppb
2015-11-17VA010-DCLSND
2015-11-17VA010-DCLSND
2016-02-08E1512059591.30 ppb
2016-02-08E1512059570.600 ppb
2016-03-29E151205962ND
2016-03-29E151205963ND
2016-03-29E151205960ND
2016-05-12E1603057451.000 ppb
2016-05-12E1603057600.600 ppb
2016-06-15E160305751ND
2016-06-20E160305746ND
2016-08-09E1607003290.900 ppb
2016-08-09E1607003271.10 ppb
2016-09-13E160700325ND
2016-11-10E1608054741.60 ppb
2016-11-10E1608054621.20 ppb
2016-11-29E1608054750.600 ppb
2016-11-29E160805461ND
2017-02-08E1612013390.600 ppb
2017-02-08E161201333ND
2017-02-28E170204040ND
2017-05-10E1703004300.600 ppb
2017-05-10E1703004310.900 ppb
2017-05-23E170300436ND
2017-05-23E170300444ND
2017-08-10E1705040390.700 ppb
2017-08-10E1705040430.800 ppb
2017-08-10E170504025ND
2017-11-08E1709019820.600 ppb
2017-11-08E1709019771.000 ppb
2017-11-16E170901981ND
2017-11-16E170901975ND
2018-02-15E180100335ND
2018-02-15E1801003271.000 ppb
2018-02-27E180100342ND
2018-05-14E180303864ND
2018-05-14E180303862ND
2018-05-23E180303850ND
2018-05-30E180303851ND
2018-08-15E1806019690.900 ppb
2018-08-15E1806019670.700 ppb
2018-08-21E180601975ND
2018-08-28E1806019711.000 ppb
2018-08-28E180601981ND
2018-11-14E1809013980.800 ppb
2018-11-14E1809014000.500 ppb
2018-11-19E1809014100.600 ppb
2018-12-11E180901404ND
2019-02-13E1811040120.800 ppb
2019-02-13E1811040170.900 ppb
2019-02-19E181104004ND
2019-02-19E181104015ND
2019-02-19E181104016ND
2019-03-21E190302948ND
2019-03-21E190302957ND
2019-05-14E1903048550.800 ppb
2019-05-14E1903048410.700 ppb
2019-05-29E190304846ND
2019-05-29E190304839ND
2019-08-13E1906099551.10 ppb
2019-08-13E1906099421.20 ppb
2019-09-10E190900749ND
2019-11-13E1910002611.000 ppb
2019-11-13E1910002591.10 ppb
2019-11-25E191000255ND
2019-12-04E1910002660.600 ppb