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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Golden State Water Company (GSWC) - Florence/Graham

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

 

135

Samples

0

Samples exceeding legal limit (MCL)

25

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.06 ppb177ND - 11.0 ppb
20150.0647 ppb171ND - 1.10 ppb
20160.105 ppb212ND - 1.20 ppb
20171.61 ppb167ND - 7.60 ppb
20180.128 ppb323ND - 1.70 ppb
20190.338 ppb325ND - 5.60 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
2014-02-042706-800-0907ND
2014-02-042706-801-0845ND
2014-02-042706-802-0835ND
2014-02-042706-803-0856ND
2014-02-062706-010-1048ND
2014-05-062706-800-09161.40 ppb
2014-05-062706-801-085210.00 ppb
2014-05-062706-802-084111.0 ppb
2014-05-062706-803-09036.00 ppb
2014-08-052706-800-09002.50 ppb
2014-08-052706-801-0835ND
2014-08-052706-802-0823ND
2014-08-052706-803-0847ND
2014-11-042706-800-09301.10 ppb
2014-11-042706-801-10003.10 ppb
2014-11-042706-802-1015ND
2014-11-042706-803-0945ND
2015-02-032706-800-0923ND
2015-02-032706-801-0855ND
2015-02-032706-802-0843ND
2015-02-032706-803-0911ND
2015-02-052706-010-1148ND
2015-05-052706-800-09541.10 ppb
2015-05-052706-801-0914ND
2015-05-052706-802-0924ND
2015-05-052706-803-0938ND
2015-08-042706-800-1004ND
2015-08-042706-801-0934ND
2015-08-042706-802-0920ND
2015-08-042706-803-0949ND
2015-11-032706-800-0946ND
2015-11-032706-801-0909ND
2015-11-032706-802-0921ND
2015-11-032706-803-0935ND
2016-02-022706-800-1002ND
2016-02-022706-801-0919ND
2016-02-022706-802-0932ND
2016-02-022706-803-0952ND
2016-02-044790-010-1030ND
2016-05-032706-800-0951ND
2016-05-032706-801-0921ND
2016-05-032706-802-0930ND
2016-05-032706-803-0940ND
2016-05-042706-027-0948ND
2016-05-042706-033-1105ND
2016-05-042706-034-1110ND
2016-05-042706-036-0900ND
2016-08-022706-800-09191.20 ppb
2016-08-022706-801-0907ND
2016-08-022706-802-0845ND
2016-08-022706-803-0915ND
2016-11-082706-800-08251.000 ppb
2016-11-082706-801-0757ND
2016-11-082706-802-0806ND
2016-11-082706-803-0815ND
2017-02-079590-800-0955ND
2017-02-079590-801-0926ND
2017-02-079590-802-0913ND
2017-02-079590-803-0941ND
2017-05-029590-800-08001.60 ppb
2017-05-029590-801-09287.60 ppb
2017-05-029590-802-09392.50 ppb
2017-05-029590-803-0950ND
2017-08-019590-800-10013.80 ppb
2017-08-019590-801-09324.40 ppb
2017-08-019590-802-09194.70 ppb
2017-08-019590-803-0946ND
2017-11-079590-800-10091.20 ppb
2017-11-079590-801-0937ND
2017-11-079590-802-0926ND
2017-11-079590-803-0954ND
2018-02-069590-800-09571.70 ppb
2018-02-069590-801-0924ND
2018-02-069590-802-0904ND
2018-02-069590-803-0937ND
2018-02-069590-804-0852ND
2018-02-069590-805-1014ND
2018-02-069590-806-1134ND
2018-02-069590-807-1108ND
2018-05-019590-800-08491.40 ppb
2018-05-019590-801-0817ND
2018-05-019590-802-0826ND
2018-05-019590-803-0837ND
2018-05-019590-804-0803ND
2018-05-019590-805-0911ND
2018-05-019590-806-1027ND
2018-05-019590-807-1010ND
2018-08-089590-800-0942ND
2018-08-089590-801-0913ND
2018-08-089590-802-0919ND
2018-08-089590-803-0931ND
2018-08-089590-804-0902ND
2018-08-089590-805-0950ND
2018-08-089590-806-1011ND
2018-08-089590-807-1002ND
2018-11-079590-800-08541.000 ppb
2018-11-079590-801-0923ND
2018-11-079590-802-0929ND
2018-11-079590-803-0902ND
2018-11-079590-804-0913ND
2018-11-079590-805-0941ND
2018-11-079590-806-1004ND
2018-11-079590-807-0954ND
2019-02-069590-800-06481.20 ppb
2019-02-069590-801-0730ND
2019-02-069590-802-0738ND
2019-02-069590-803-0700ND
2019-02-069590-804-0715ND
2019-02-069590-805-0800ND
2019-02-069590-806-0915ND
2019-02-069590-807-0853ND
2019-05-079590-800-07491.40 ppb
2019-05-079590-801-0832ND
2019-05-079590-802-0840ND
2019-05-079590-803-0802ND
2019-05-079590-804-0817ND
2019-05-079590-805-0858ND
2019-05-079590-806-1007ND
2019-05-079590-807-0946ND
2019-08-069590-800-08351.30 ppb
2019-08-069590-801-0914ND
2019-08-069590-802-0922ND
2019-08-069590-803-0846ND
2019-08-069590-804-0900ND
2019-08-069590-805-0939ND
2019-08-069590-806-1101ND
2019-08-069590-807-1028ND
2019-11-059590-800-0912ND
2019-11-059590-801-0952ND
2019-11-059590-802-10005.60 ppb
2019-11-059590-803-0922ND
2019-11-059590-804-0937ND
2019-11-059590-805-1019ND
2019-11-059590-806-11111.30 ppb
2019-11-059590-807-1138ND