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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

East Orange County Water District - Rz

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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

 

80

Samples

0

Samples exceeding legal limit (MCL)

26

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.00 ppb92ND - 9.40 ppb
20151.26 ppb123ND - 7.16 ppb
20160.634 ppb135ND - 4.13 ppb
20171.71 ppb166ND - 6.69 ppb
20181.12 ppb164ND - 7.74 ppb
20191.78 ppb146ND - 6.58 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-03-049469-802-13009.40 ppb
2014-03-049469-801-12008.58 ppb
2014-04-164417-001-1105ND
2014-08-274417-001-0920ND
2014-09-029469-802-1432ND
2014-09-029469-801-1313ND
2014-11-254417-001-0905ND
2014-12-029469-802-1122ND
2014-12-029469-801-1340ND
2015-03-039469-802-0839ND
2015-03-039469-801-1228ND
2015-03-184417-001-1225ND
2015-05-064417-001-0845ND
2015-06-029469-801-15301.32 ppb
2015-06-029469-802-1315ND
2015-08-114417-001-1045ND
2015-09-019469-801-1226ND
2015-09-019469-802-1309ND
2015-12-014417-001-1040ND
2015-12-019469-801-08406.64 ppb
2015-12-019469-802-09557.16 ppb
2016-02-254417-001-0900ND
2016-03-019469-801-13021.42 ppb
2016-03-019469-802-0925ND
2016-05-034417-001-1120ND
2016-06-079469-802-0942ND
2016-06-079469-801-09051.26 ppb
2016-08-084417-001-0840ND
2016-09-069469-802-08200.871 ppb
2016-09-069469-801-11504.13 ppb
2016-10-134417-002-0900ND
2016-10-134417-001-0840ND
2016-12-069469-802-1306ND
2016-12-069469-801-11400.555 ppb
2017-02-084417-001-1030ND
2017-02-084417-002-1040ND
2017-03-079469-801-12301.52 ppb
2017-03-079469-802-14121.45 ppb
2017-05-034417-001-0925ND
2017-05-034417-002-0940ND
2017-06-069469-802-08275.63 ppb
2017-06-069469-801-10035.44 ppb
2017-08-074417-002-1010ND
2017-08-104417-001-1035ND
2017-11-014417-001-0850ND
2017-11-084417-002-0920ND
2017-11-304417-002-1330ND
2017-11-304417-002-1320ND
2017-12-059469-802-13576.57 ppb
2017-12-059469-801-10386.69 ppb
2018-02-144417-001-1005ND
2018-02-154417-002-0945ND
2018-03-069469-801-12522.60 ppb
2018-03-069469-802-1348ND
2018-05-024417-001-0855ND
2018-05-034417-002-0850ND
2018-06-059469-801-0950ND
2018-06-059469-802-1547ND
2018-08-024417-001-1000ND
2018-08-024417-002-1010ND
2018-09-049469-801-09301.33 ppb
2018-09-049469-802-1345ND
2018-10-304417-001-0820ND
2018-10-304417-002-0830ND
2018-12-049469-802-12406.23 ppb
2018-12-049469-801-13437.74 ppb
2019-02-204417-002-0850ND
2019-02-204417-001-0905ND
2019-03-059469-802-11181.44 ppb
2019-03-059469-801-13191.51 ppb
2019-04-234417-002-0910ND
2019-04-234417-001-0855ND
2019-06-049469-802-13294.38 ppb
2019-06-049469-801-13295.29 ppb
2019-09-039469-801-13346.58 ppb
2019-09-039469-802-15205.77 ppb
2019-09-034417-002-0905ND
2019-09-034417-001-0855ND
2019-11-054417-002-0930ND
2019-11-054417-001-0925ND