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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Henrico County Water System

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

 

156

Samples

0

Samples exceeding legal limit (MCL)

113

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.56 ppb2519ND - 5.60 ppb
20150.880 ppb2521ND - 3.30 ppb
20160.516 ppb2515ND - 1.70 ppb
20171.23 ppb3126ND - 2.60 ppb
20180.772 ppb2516ND - 4.60 ppb
20190.816 ppb2516ND - 2.40 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
2014-01-08E1312083060.800 ppb
2014-01-08E1312083260.800 ppb
2014-01-08E131208312ND
2014-01-08E131208316ND
2014-01-08E131208305ND
2014-01-08E131208325ND
2014-04-11E1403050940.900 ppb
2014-04-11E1403050900.800 ppb
2014-04-11E1403050980.700 ppb
2014-04-11E1403050890.700 ppb
2014-04-11E1403050740.700 ppb
2014-04-11E140305092ND
2014-07-09E140606747ND
2014-07-11E1406067441.80 ppb
2014-07-11E1406067511.50 ppb
2014-07-11E1406067521.50 ppb
2014-07-11E1406067291.50 ppb
2014-07-11E1406067251.50 ppb
2014-07-11E1406067530.600 ppb
2014-10-10E1408025055.60 ppb
2014-10-10E1408025035.20 ppb
2014-10-10E1408025114.80 ppb
2014-10-10E1408024884.30 ppb
2014-10-10E1408024873.40 ppb
2014-10-10E1408024901.90 ppb
2015-01-08VA010-DCLS1.20 ppb
2015-01-08VA010-DCLS1.20 ppb
2015-01-08VA010-DCLS0.800 ppb
2015-01-08VA010-DCLS0.800 ppb
2015-01-08VA010-DCLS0.700 ppb
2015-01-08VA010-DCLS0.600 ppb
2015-04-10VA010-DCLS1.10 ppb
2015-04-10VA010-DCLS0.800 ppb
2015-04-10VA010-DCLS0.700 ppb
2015-04-10VA010-DCLS0.700 ppb
2015-04-10VA010-DCLS0.600 ppb
2015-04-10VA010-DCLSND
2015-07-08VA010-DCLSND
2015-07-10VA010-DCLS1.10 ppb
2015-07-10VA010-DCLS1.000 ppb
2015-07-10VA010-DCLS0.900 ppb
2015-07-10VA010-DCLS0.900 ppb
2015-07-10VA010-DCLS0.700 ppb
2015-07-10VA010-DCLS0.500 ppb
2015-10-09VA010-DCLS3.30 ppb
2015-10-09VA010-DCLS3.10 ppb
2015-10-09VA010-DCLS0.700 ppb
2015-10-09VA010-DCLS0.600 ppb
2015-10-09VA010-DCLSND
2015-10-09VA010-DCLSND
2016-01-07E1512037090.500 ppb
2016-01-07E151203710ND
2016-01-07E151203694ND
2016-01-07E151203704ND
2016-01-07E151203712ND
2016-01-14E151203706ND
2016-04-08E1602050960.700 ppb
2016-04-08E1602050980.700 ppb
2016-04-08E1602050950.600 ppb
2016-04-08E1602051170.600 ppb
2016-04-08E160205090ND
2016-04-08E160205091ND
2016-07-13E160604582ND
2016-07-15E1606046021.50 ppb
2016-07-15E1606045881.40 ppb
2016-07-15E1606045730.900 ppb
2016-07-15E1606045710.800 ppb
2016-07-15E1606045760.600 ppb
2016-07-15E160604580ND
2016-10-14E1609025001.70 ppb
2016-10-14E1609024971.20 ppb
2016-10-14E1609024990.600 ppb
2016-10-14E1609024750.600 ppb
2016-10-14E1609024900.500 ppb
2016-10-14E160902485ND
2017-01-12E1612046621.80 ppb
2017-01-12E1612046821.70 ppb
2017-01-12E1612046740.900 ppb
2017-01-12E1612046630.900 ppb
2017-01-12E161204683ND
2017-01-12E161204670ND
2017-04-14E1702040851.40 ppb
2017-04-14E1702040811.20 ppb
2017-04-14E1702040870.700 ppb
2017-04-14E170204092ND
2017-04-14E170204080ND
2017-04-14E170204093ND
2017-07-12E1706040870.600 ppb
2017-07-13E1706040851.40 ppb
2017-07-13E1706040621.40 ppb
2017-07-13E1706040841.30 ppb
2017-07-13E1706040781.30 ppb
2017-07-13E1706040661.30 ppb
2017-07-13E1706040950.700 ppb
2017-09-15E1708042182.20 ppb
2017-09-15E1708042311.80 ppb
2017-09-15E1708042301.80 ppb
2017-09-15E1708042201.80 ppb
2017-09-15E1708042271.70 ppb
2017-09-15E1708042231.10 ppb
2017-10-26E1710030082.60 ppb
2017-10-26E1710030172.10 ppb
2017-10-26E1710030111.80 ppb
2017-10-26E1710030061.70 ppb
2017-10-26E1710030101.40 ppb
2017-10-26E1710030131.40 ppb
2018-01-12E1712001210.800 ppb
2018-01-12E1712001231.20 ppb
2018-01-12E1712001251.30 ppb
2018-01-12E1712001281.30 ppb
2018-01-12E1712001301.20 ppb
2018-01-12E1712001501.30 ppb
2018-04-13E180301257ND
2018-04-13E180301259ND
2018-04-13E180301260ND
2018-04-13E180301261ND
2018-04-13E180301273ND
2018-04-13E180301276ND
2018-07-11E1806105450.600 ppb
2018-07-13E1806105551.20 ppb
2018-07-13E1806105560.900 ppb
2018-07-13E1806105581.20 ppb
2018-07-13E1806105604.60 ppb
2018-07-13E1806105621.10 ppb
2018-07-13E1806105640.700 ppb
2018-10-12E1810005190.800 ppb
2018-10-12E1810005270.500 ppb
2018-10-12E181000528ND
2018-10-12E181000539ND
2018-10-12E1810005400.600 ppb
2018-10-12E181000543ND
2019-01-11E181202388ND
2019-01-11E181202390ND
2019-01-11E181202392ND
2019-01-11E181202396ND
2019-01-11E181202400ND
2019-01-11E181202402ND
2019-04-12E1903013630.600 ppb
2019-04-12E190301365ND
2019-04-12E190301374ND
2019-04-12E1903013770.500 ppb
2019-04-12E1903013780.700 ppb
2019-04-12E1903013800.500 ppb
2019-07-09E1906029231.30 ppb
2019-07-09E1906029461.40 ppb
2019-07-09E1906029471.40 ppb
2019-07-09E1906029500.600 ppb
2019-07-09E1906029510.600 ppb
2019-07-09E1906029540.900 ppb
2019-07-10E190602936ND
2019-10-11E1909031722.00 ppb
2019-10-11E1909031732.40 ppb
2019-10-11E1909031752.20 ppb
2019-10-11E1909031771.20 ppb
2019-10-11E1909031792.10 ppb
2019-10-11E1909031862.00 ppb