Dibromochloromethane
Golden State Water Company (GSWC) - San Dimas
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 10.6 ppb | 34 | 32 | ND - 17.0 ppb |
2015 | 10.3 ppb | 34 | 30 | ND - 22.0 ppb |
2016 | 12.8 ppb | 34 | 32 | ND - 22.0 ppb |
2017 | 6.70 ppb | 34 | 32 | ND - 13.0 ppb |
2018 | 12.7 ppb | 34 | 32 | ND - 31.0 ppb |
2019 | 5.99 ppb | 34 | 32 | ND - 19.0 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 |
---|---|---|
2014-01-24 | 9588-800-0850 | 9.00 ppb |
2014-01-24 | 9588-801-0740 | 14.0 ppb |
2014-01-24 | 9588-802-0730 | 15.0 ppb |
2014-01-24 | 9588-803-0810 | 15.0 ppb |
2014-01-24 | 9588-804-1045 | 17.0 ppb |
2014-01-24 | 9588-805-0755 | 9.90 ppb |
2014-01-24 | 9588-806-0825 | 13.0 ppb |
2014-01-24 | 9588-807-1030 | 15.0 ppb |
2014-02-19 | 9588-051-0930 | ND |
2014-04-23 | 9588-800-0825 | 9.50 ppb |
2014-04-23 | 9588-801-0735 | 11.0 ppb |
2014-04-23 | 9588-802-0725 | 12.0 ppb |
2014-04-23 | 9588-803-0755 | 12.0 ppb |
2014-04-23 | 9588-804-1005 | 9.30 ppb |
2014-04-23 | 9588-805-0745 | 9.50 ppb |
2014-04-23 | 9588-806-0805 | 9.20 ppb |
2014-04-23 | 9588-807-0950 | 13.0 ppb |
2014-05-14 | 9588-014-1010 | ND |
2014-07-24 | 9588-800-1055 | 8.20 ppb |
2014-07-24 | 9588-801-1125 | 11.0 ppb |
2014-07-24 | 9588-802-1335 | 11.0 ppb |
2014-07-24 | 9588-803-1140 | 11.0 ppb |
2014-07-24 | 9588-804-1400 | 12.0 ppb |
2014-07-24 | 9588-805-1110 | 9.30 ppb |
2014-07-24 | 9588-806-1155 | 12.0 ppb |
2014-07-24 | 9588-807-1210 | 8.70 ppb |
2014-10-27 | 9588-800-0845 | 11.0 ppb |
2014-10-27 | 9588-801-0745 | 10.00 ppb |
2014-10-27 | 9588-802-0735 | 12.0 ppb |
2014-10-27 | 9588-803-0810 | 9.90 ppb |
2014-10-27 | 9588-804-1045 | 12.0 ppb |
2014-10-27 | 9588-805-0755 | 10.00 ppb |
2014-10-27 | 9588-806-0820 | 7.70 ppb |
2014-11-18 | 9588-807-0940 | 11.0 ppb |
2015-01-28 | 9588-800-0830 | 6.90 ppb |
2015-01-28 | 9588-801-0740 | 8.80 ppb |
2015-01-28 | 9588-802-0730 | 22.0 ppb |
2015-01-28 | 9588-803-0800 | 9.90 ppb |
2015-01-28 | 9588-804-1030 | 22.0 ppb |
2015-01-28 | 9588-805-0750 | 7.40 ppb |
2015-01-28 | 9588-806-0810 | 7.90 ppb |
2015-01-28 | 9588-807-0955 | 6.90 ppb |
2015-02-18 | 9588-051-0920 | ND |
2015-04-23 | 9588-800-0810 | 6.90 ppb |
2015-04-23 | 9588-801-0715 | 8.70 ppb |
2015-04-23 | 9588-802-0705 | 9.10 ppb |
2015-04-23 | 9588-803-0735 | 9.00 ppb |
2015-04-23 | 9588-804-0955 | 8.80 ppb |
2015-04-23 | 9588-805-0725 | 6.40 ppb |
2015-04-23 | 9588-806-0745 | 8.10 ppb |
2015-04-23 | 9588-807-0940 | 9.30 ppb |
2015-05-18 | 9588-014-0915 | ND |
2015-07-27 | 9588-800-1025 | 14.0 ppb |
2015-07-27 | 9588-801-0920 | 17.0 ppb |
2015-07-27 | 9588-802-0910 | 13.0 ppb |
2015-07-27 | 9588-803-0945 | 14.0 ppb |
2015-07-27 | 9588-804-1210 | 14.0 ppb |
2015-07-27 | 9588-805-0935 | 16.0 ppb |
2015-07-27 | 9588-806-1000 | 18.0 ppb |
2015-07-27 | 9588-807-1150 | 11.0 ppb |
2015-10-28 | 9588-800-0930 | ND |
2015-10-28 | 9588-801-0830 | 15.0 ppb |
2015-10-28 | 9588-802-0815 | 11.0 ppb |
2015-10-28 | 9588-803-0855 | 15.0 ppb |
2015-10-28 | 9588-804-0800 | 13.0 ppb |
2015-10-28 | 9588-805-0840 | ND |
2015-10-28 | 9588-806-0910 | 8.60 ppb |
2015-10-28 | 9588-807-1055 | 14.0 ppb |
2016-01-25 | 9588-800-0840 | 9.60 ppb |
2016-01-25 | 9588-801-0740 | 10.00 ppb |
2016-01-25 | 9588-802-0725 | 20.0 ppb |
2016-01-25 | 9588-803-0810 | 10.00 ppb |
2016-01-25 | 9588-804-1240 | 21.0 ppb |
2016-01-25 | 9588-805-0800 | 9.70 ppb |
2016-01-25 | 9588-806-0820 | 8.20 ppb |
2016-01-25 | 9588-807-1220 | 10.00 ppb |
2016-02-16 | 9588-051-0825 | ND |
2016-04-27 | 9588-800-0835 | 11.0 ppb |
2016-04-27 | 9588-801-0740 | 13.0 ppb |
2016-04-27 | 9588-802-0730 | 18.0 ppb |
2016-04-27 | 9588-803-0805 | 15.0 ppb |
2016-04-27 | 9588-804-1040 | 18.0 ppb |
2016-04-27 | 9588-805-0750 | 3.60 ppb |
2016-04-27 | 9588-806-0815 | 13.0 ppb |
2016-04-27 | 9588-807-1015 | 13.0 ppb |
2016-05-12 | 9588-014-0925 | ND |
2016-07-25 | 9588-800-0830 | 22.0 ppb |
2016-07-25 | 9588-801-0725 | 18.0 ppb |
2016-07-25 | 9588-802-0710 | 17.0 ppb |
2016-07-25 | 9588-803-0750 | 19.0 ppb |
2016-07-25 | 9588-804-1210 | 20.0 ppb |
2016-07-25 | 9588-805-0745 | 12.0 ppb |
2016-07-25 | 9588-806-0800 | 17.0 ppb |
2016-07-25 | 9588-807-1140 | 18.0 ppb |
2016-10-25 | 9588-800-0830 | 8.50 ppb |
2016-10-25 | 9588-801-0730 | 12.0 ppb |
2016-10-25 | 9588-802-0720 | 12.0 ppb |
2016-10-25 | 9588-803-0800 | 14.0 ppb |
2016-10-25 | 9588-804-1230 | 11.0 ppb |
2016-10-25 | 9588-805-0750 | 9.50 ppb |
2016-10-25 | 9588-806-0810 | 8.80 ppb |
2016-10-25 | 9588-807-1205 | 12.0 ppb |
2017-01-05 | 9588-051-0800 | ND |
2017-01-27 | 9588-800-0815 | 7.40 ppb |
2017-01-27 | 9588-801-0725 | 12.0 ppb |
2017-01-27 | 9588-802-0715 | 9.50 ppb |
2017-01-27 | 9588-803-0745 | 12.0 ppb |
2017-01-27 | 9588-804-1015 | 11.0 ppb |
2017-01-27 | 9588-805-0735 | 10.00 ppb |
2017-01-27 | 9588-806-0755 | 12.0 ppb |
2017-01-27 | 9588-807-0955 | 9.20 ppb |
2017-04-25 | 9588-800-0830 | 1.10 ppb |
2017-04-25 | 9588-801-0720 | 4.60 ppb |
2017-04-25 | 9588-802-0710 | 4.10 ppb |
2017-04-25 | 9588-803-0800 | 4.20 ppb |
2017-04-25 | 9588-804-1225 | 4.40 ppb |
2017-04-25 | 9588-805-0745 | 2.80 ppb |
2017-04-25 | 9588-806-0810 | 4.50 ppb |
2017-04-25 | 9588-807-1200 | 3.60 ppb |
2017-05-15 | 9588-014-0905 | ND |
2017-07-25 | 9588-800-1420 | 4.70 ppb |
2017-07-25 | 9588-801-1505 | 6.00 ppb |
2017-07-25 | 9588-802-1520 | 5.40 ppb |
2017-07-25 | 9588-803-1450 | 5.80 ppb |
2017-07-25 | 9588-804-1545 | 5.30 ppb |
2017-07-25 | 9588-805-1435 | 4.60 ppb |
2017-07-25 | 9588-806-1405 | 7.40 ppb |
2017-07-25 | 9588-807-1355 | 4.70 ppb |
2017-10-27 | 9588-800-0830 | 7.80 ppb |
2017-10-27 | 9588-801-0735 | 8.60 ppb |
2017-10-27 | 9588-802-0725 | 7.80 ppb |
2017-10-27 | 9588-803-0800 | 8.90 ppb |
2017-10-27 | 9588-804-1025 | 8.90 ppb |
2017-10-27 | 9588-805-0745 | 13.0 ppb |
2017-10-27 | 9588-806-0810 | 8.20 ppb |
2017-10-27 | 9588-807-1010 | 8.30 ppb |
2018-01-26 | 9588-800-0840 | 17.0 ppb |
2018-01-26 | 9588-801-0730 | 22.0 ppb |
2018-01-26 | 9588-802-0720 | 26.0 ppb |
2018-01-26 | 9588-803-0800 | 26.0 ppb |
2018-01-26 | 9588-804-1040 | 24.0 ppb |
2018-01-26 | 9588-805-0745 | 28.0 ppb |
2018-01-26 | 9588-806-0815 | 31.0 ppb |
2018-01-26 | 9588-807-1020 | 23.0 ppb |
2018-02-15 | 9588-051-1045 | ND |
2018-04-25 | 9588-800-0830 | 7.40 ppb |
2018-04-25 | 9588-801-0720 | 14.0 ppb |
2018-04-25 | 9588-802-0710 | 11.0 ppb |
2018-04-25 | 9588-803-0755 | 10.00 ppb |
2018-04-25 | 9588-804-1150 | 11.0 ppb |
2018-04-25 | 9588-805-0740 | 12.0 ppb |
2018-04-25 | 9588-806-0810 | 10.00 ppb |
2018-04-25 | 9588-807-1135 | 12.0 ppb |
2018-05-16 | 9588-014-0855 | ND |
2018-07-27 | 9588-800-0730 | 14.0 ppb |
2018-07-27 | 9588-801-0645 | 9.20 ppb |
2018-07-27 | 9588-802-0635 | 9.20 ppb |
2018-07-27 | 9588-803-0705 | 10.00 ppb |
2018-07-27 | 9588-804-0910 | 11.0 ppb |
2018-07-27 | 9588-805-0655 | 12.0 ppb |
2018-07-27 | 9588-806-0715 | 11.0 ppb |
2018-07-27 | 9588-807-0855 | 11.0 ppb |
2018-10-26 | 9588-800-0855 | 14.0 ppb |
2018-10-26 | 9588-801-0740 | 6.90 ppb |
2018-10-26 | 9588-802-0730 | 6.80 ppb |
2018-10-26 | 9588-803-0815 | 6.50 ppb |
2018-10-26 | 9588-804-1100 | 7.60 ppb |
2018-10-26 | 9588-805-0805 | 6.00 ppb |
2018-10-26 | 9588-806-0825 | 5.50 ppb |
2018-10-26 | 9588-807-1045 | 6.70 ppb |
2019-01-25 | 9588-800-0925 | 19.0 ppb |
2019-01-25 | 9588-801-0805 | 11.0 ppb |
2019-01-25 | 9588-802-0750 | 11.0 ppb |
2019-01-25 | 9588-803-0845 | 12.0 ppb |
2019-01-25 | 9588-804-1145 | 12.0 ppb |
2019-01-25 | 9588-805-0835 | 12.0 ppb |
2019-01-25 | 9588-806-0900 | 12.0 ppb |
2019-01-25 | 9588-807-1130 | 11.0 ppb |
2019-02-11 | 9588-051-0835 | ND |
2019-04-24 | 9588-800-0815 | 2.90 ppb |
2019-04-24 | 9588-801-0710 | 4.40 ppb |
2019-04-24 | 9588-802-0700 | 3.50 ppb |
2019-04-24 | 9588-803-0735 | 4.00 ppb |
2019-04-24 | 9588-804-1000 | 3.70 ppb |
2019-04-24 | 9588-805-0720 | 1.90 ppb |
2019-04-24 | 9588-806-0750 | 3.90 ppb |
2019-04-24 | 9588-807-0945 | 5.90 ppb |
2019-06-12 | 9588-014-0830 | ND |
2019-07-24 | 9588-800-0825 | 1.50 ppb |
2019-07-24 | 9588-801-0730 | 4.70 ppb |
2019-07-24 | 9588-802-0715 | 5.00 ppb |
2019-07-24 | 9588-803-0750 | 5.40 ppb |
2019-07-24 | 9588-804-1020 | 4.30 ppb |
2019-07-24 | 9588-805-0740 | 4.00 ppb |
2019-07-24 | 9588-806-0800 | 4.10 ppb |
2019-07-24 | 9588-807-1005 | 4.60 ppb |
2019-10-25 | 9588-800-0820 | 3.70 ppb |
2019-10-25 | 9588-801-0710 | 5.00 ppb |
2019-10-25 | 9588-802-0700 | 4.90 ppb |
2019-10-25 | 9588-803-0740 | 5.60 ppb |
2019-10-25 | 9588-804-1155 | 5.20 ppb |
2019-10-25 | 9588-805-0730 | 5.50 ppb |
2019-10-25 | 9588-806-0750 | 4.70 ppb |
2019-10-25 | 9588-807-1135 | 5.20 ppb |