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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Town of Warrenton

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

 

107

Samples

0

Samples exceeding legal limit (MCL)

95

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.912 ppb1714ND - 2.20 ppb
20151.21 ppb17170.600 ppb - 2.40 ppb
20161.20 ppb1913ND - 3.70 ppb
20171.07 ppb17170.600 ppb - 1.80 ppb
20180.933 ppb1817ND - 1.60 ppb
20191.19 ppb1917ND - 3.40 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
2014-02-18E1312073930.500 ppb
2014-02-18E1312073980.500 ppb
2014-02-18E131207392ND
2014-02-18E131207396ND
2014-05-27E1405008461.000 ppb
2014-05-27E1405008480.900 ppb
2014-05-27E1405008520.800 ppb
2014-05-27E140500850ND
2014-08-19E1406060322.20 ppb
2014-08-19E1406060212.00 ppb
2014-08-19E1406060311.80 ppb
2014-08-19E1406060341.50 ppb
2014-09-09E1406060300.500 ppb
2014-11-18E1409032601.10 ppb
2014-11-18E1409032661.000 ppb
2014-11-18E1409032610.900 ppb
2014-11-18E1409032650.800 ppb
2015-02-18VA010-DCLS0.700 ppb
2015-02-18VA010-DCLS0.700 ppb
2015-02-18VA010-DCLS0.700 ppb
2015-02-18VA010-DCLS0.700 ppb
2015-05-19VA010-DCLS1.40 ppb
2015-05-19VA010-DCLS1.40 ppb
2015-05-19VA010-DCLS1.30 ppb
2015-05-19VA010-DCLS1.30 ppb
2015-08-18VA010-DCLS2.40 ppb
2015-08-18VA010-DCLS2.20 ppb
2015-08-18VA010-DCLS2.20 ppb
2015-08-18VA010-DCLS2.10 ppb
2015-09-15VA010-DCLS0.700 ppb
2015-11-17VA010-DCLS0.700 ppb
2015-11-17VA010-DCLS0.700 ppb
2015-11-17VA010-DCLS0.700 ppb
2015-11-17VA010-DCLS0.600 ppb
2016-02-17E151205729ND
2016-02-17E151205734ND
2016-02-17E151205732ND
2016-02-17E151205724ND
2016-05-17E1603015780.600 ppb
2016-05-17E1603015850.600 ppb
2016-05-17E1603015750.600 ppb
2016-05-18E1603015830.800 ppb
2016-08-16E1606039953.70 ppb
2016-08-16E1606039742.80 ppb
2016-08-16E1606039792.60 ppb
2016-08-16E1606039822.40 ppb
2016-09-20E1606039781.20 ppb
2016-09-20E160603992ND
2016-09-20E160603990ND
2016-11-15E1609031322.50 ppb
2016-11-15E1609031342.00 ppb
2016-11-15E1609031351.90 ppb
2016-11-15E1609031331.10 ppb
2017-02-21E1612059131.20 ppb
2017-02-21E1612059211.10 ppb
2017-02-21E1612059231.10 ppb
2017-02-21E1612059220.900 ppb
2017-05-16E1703044621.80 ppb
2017-05-16E1703044701.50 ppb
2017-05-16E1703044661.40 ppb
2017-05-16E1703044681.30 ppb
2017-08-15E1706083991.20 ppb
2017-08-15E1706083961.10 ppb
2017-08-15E1706084021.10 ppb
2017-08-16E1706083980.800 ppb
2017-08-22E1706084040.600 ppb
2017-11-20E1709025240.800 ppb
2017-11-20E1709025280.800 ppb
2017-11-20E1709025320.800 ppb
2017-11-20E1709025300.700 ppb
2018-02-20E1712046210.900 ppb
2018-02-20E1712046230.800 ppb
2018-02-20E1712046280.700 ppb
2018-02-20E1712046300.700 ppb
2018-05-15E1803062871.10 ppb
2018-05-15E1803062911.20 ppb
2018-05-15E1803062931.20 ppb
2018-05-15E1803062941.20 ppb
2018-06-25E180607845ND
2018-07-23E1807024600.700 ppb
2018-08-22E1807024701.20 ppb
2018-08-22E1807024721.60 ppb
2018-08-22E1807024961.60 ppb
2018-08-22E1807025041.60 ppb
2018-11-19E1809054100.600 ppb
2018-11-19E1809054120.600 ppb
2018-11-19E1809054140.500 ppb
2018-11-19E1809054150.600 ppb
2019-02-19E1812067890.700 ppb
2019-02-19E1812067910.800 ppb
2019-02-19E1812067930.700 ppb
2019-02-19E1812067940.700 ppb
2019-05-21E1903082411.000 ppb
2019-05-21E1903082481.000 ppb
2019-05-21E1903082510.800 ppb
2019-05-21E1903082531.000 ppb
2019-08-20E1906100673.10 ppb
2019-08-20E1906100712.60 ppb
2019-08-20E1906100722.00 ppb
2019-08-20E1906100753.40 ppb
2019-08-27E1906100810.700 ppb
2019-08-27E190610086ND
2019-08-27E190610091ND
2019-11-19E1910020571.000 ppb
2019-11-19E1910020591.000 ppb
2019-11-19E1910020641.20 ppb
2019-11-19E1910020660.900 ppb