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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Mount Airy

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)

29

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.688 ppb167ND - 2.00 ppb
20150.500 ppb164ND - 2.47 ppb
20160.148 ppb162ND - 1.22 ppb
20171.76 ppb16161.000 ppb - 3.11 ppb
2018ND160ND
2019ND160ND

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
2014-02-2037729_14-050682.00 ppb
2014-02-2037729_14-050692.00 ppb
2014-02-2037729_14-050702.00 ppb
2014-02-2037729_14-050672.00 ppb
2014-05-2937729_14-15144ND
2014-05-2937729_14-151451.000 ppb
2014-05-2937729_14-151461.000 ppb
2014-05-2937729_14-151471.000 ppb
2014-08-2137729_14-25462ND
2014-08-2137729_14-25463ND
2014-08-2137729_14-25464ND
2014-08-2137729_14-25465ND
2014-11-2037729_14-35480ND
2014-11-2037729_14-35481ND
2014-11-2037729_14-35479ND
2014-11-2037729_14-35478ND
2015-02-25ND
2015-02-25ND
2015-02-25ND
2015-02-25ND
2015-05-21ND
2015-05-21ND
2015-05-21ND
2015-05-21ND
2015-08-201.91 ppb
2015-08-201.87 ppb
2015-08-201.76 ppb
2015-08-202.47 ppb
2015-11-19ND
2015-11-19ND
2015-11-19ND
2015-11-19ND
2016-02-1837729_16-05304ND
2016-02-1837729_16-05305ND
2016-02-1837729_16-05306ND
2016-02-1837729_16-05307ND
2016-05-1937729_16-158691.22 ppb
2016-05-1937729_16-158681.15 ppb
2016-05-1937729_16-15864ND
2016-05-1937729_16-15860ND
2016-08-1837729_16-28547ND
2016-08-1837729_16-28550ND
2016-08-1837729_16-28552ND
2016-08-1837729_16-28553ND
2016-11-1837729_16-40609ND
2016-11-1837729_16-40610ND
2016-11-1837729_16-40611ND
2016-11-1837729_16-40612ND
2017-02-2337729_17-063301.000 ppb
2017-02-2337729_17-063331.10 ppb
2017-02-2337729_17-063311.000 ppb
2017-02-2337729_17-063321.11 ppb
2017-05-1837729_17-166151.07 ppb
2017-05-1837729_17-166161.23 ppb
2017-05-1837729_17-166171.44 ppb
2017-05-1837729_17-166181.70 ppb
2017-08-2437729_17-305883.11 ppb
2017-08-2437729_17-305872.91 ppb
2017-08-2437729_17-305861.93 ppb
2017-08-2437729_17-305851.61 ppb
2017-11-1637729_17-434352.41 ppb
2017-11-1637729_17-434362.22 ppb
2017-11-1637729_17-434372.00 ppb
2017-11-1637729_17-434382.36 ppb
2018-02-2237729_18-07232 ND
2018-02-2237729_18-07231 ND
2018-02-2237729_18-07230 ND
2018-02-2237729_18-07229 ND
2018-05-2437729_18-20625 ND
2018-05-2437729_18-20622 ND
2018-05-2437729_18-20623 ND
2018-05-2437729_18-20624 ND
2018-08-2337729_18-35310 ND
2018-08-2337729_18-35309 ND
2018-08-2337729_18-35308 ND
2018-08-2337729_18-35306 ND
2018-11-1537729_18-48163 ND
2018-11-1537729_18-48164 ND
2018-11-1537729_18-48165 ND
2018-11-1537729_18-48166 ND
2019-02-2137729_19-07549 ND
2019-02-2137729_19-07550 ND
2019-02-2137729_19-07551 ND
2019-02-2137729_19-07552 ND
2019-05-2337729_19-21135 ND
2019-05-2337729_19-21138 ND
2019-05-2337729_19-21137 ND
2019-05-2337729_19-21136 ND
2019-08-2237729_19-36236 ND
2019-08-2237729_19-36238 ND
2019-08-2237729_19-36237 ND
2019-08-2237729_19-36235 ND
2019-11-2137729_19-50089 ND
2019-11-2137729_19-50088 ND
2019-11-2137729_19-50087 ND
2019-11-2137729_19-50086 ND