Bromoform
Golden State Water Company (GSWC) - San Dimas
Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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 | 5.65 ppb | 34 | 32 | ND - 15.0 ppb |
2015 | 5.41 ppb | 34 | 30 | ND - 18.0 ppb |
2016 | 5.69 ppb | 34 | 32 | ND - 19.0 ppb |
2017 | 2.16 ppb | 34 | 16 | ND - 8.40 ppb |
2018 | 3.56 ppb | 34 | 32 | ND - 5.60 ppb |
2019 | 1.88 ppb | 34 | 26 | ND - 8.30 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.5 ppb
The EWG Health Guideline of 0.5 ppb for bromoform 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 | 8.20 ppb |
2014-01-24 | 9588-801-0740 | 11.0 ppb |
2014-01-24 | 9588-802-0730 | 13.0 ppb |
2014-01-24 | 9588-803-0810 | 12.0 ppb |
2014-01-24 | 9588-804-1045 | 15.0 ppb |
2014-01-24 | 9588-805-0755 | 10.00 ppb |
2014-01-24 | 9588-806-0825 | 9.20 ppb |
2014-01-24 | 9588-807-1030 | 11.0 ppb |
2014-02-19 | 9588-051-0930 | ND |
2014-04-23 | 9588-800-0825 | 5.80 ppb |
2014-04-23 | 9588-801-0735 | 4.70 ppb |
2014-04-23 | 9588-802-0725 | 5.00 ppb |
2014-04-23 | 9588-803-0755 | 4.90 ppb |
2014-04-23 | 9588-804-1005 | 2.20 ppb |
2014-04-23 | 9588-805-0745 | 4.70 ppb |
2014-04-23 | 9588-806-0805 | 2.00 ppb |
2014-04-23 | 9588-807-0950 | 8.70 ppb |
2014-05-14 | 9588-014-1010 | ND |
2014-07-24 | 9588-800-1055 | 4.30 ppb |
2014-07-24 | 9588-801-1125 | 2.50 ppb |
2014-07-24 | 9588-802-1335 | 4.60 ppb |
2014-07-24 | 9588-803-1140 | 2.80 ppb |
2014-07-24 | 9588-804-1400 | 3.10 ppb |
2014-07-24 | 9588-805-1110 | 5.00 ppb |
2014-07-24 | 9588-806-1155 | 2.70 ppb |
2014-07-24 | 9588-807-1210 | 4.40 ppb |
2014-10-27 | 9588-800-0845 | 6.20 ppb |
2014-10-27 | 9588-801-0745 | 2.90 ppb |
2014-10-27 | 9588-802-0735 | 4.80 ppb |
2014-10-27 | 9588-803-0810 | 2.40 ppb |
2014-10-27 | 9588-804-1045 | 4.30 ppb |
2014-10-27 | 9588-805-0755 | 5.70 ppb |
2014-10-27 | 9588-806-0820 | 1.80 ppb |
2014-11-18 | 9588-807-0940 | 7.20 ppb |
2015-01-28 | 9588-800-0830 | 6.00 ppb |
2015-01-28 | 9588-801-0740 | 6.10 ppb |
2015-01-28 | 9588-802-0730 | 18.0 ppb |
2015-01-28 | 9588-803-0800 | 7.40 ppb |
2015-01-28 | 9588-804-1030 | 15.0 ppb |
2015-01-28 | 9588-805-0750 | 6.60 ppb |
2015-01-28 | 9588-806-0810 | 5.50 ppb |
2015-01-28 | 9588-807-0955 | 4.90 ppb |
2015-02-18 | 9588-051-0920 | ND |
2015-04-23 | 9588-800-0810 | 4.60 ppb |
2015-04-23 | 9588-801-0715 | 4.10 ppb |
2015-04-23 | 9588-802-0705 | 4.40 ppb |
2015-04-23 | 9588-803-0735 | 3.90 ppb |
2015-04-23 | 9588-804-0955 | 4.60 ppb |
2015-04-23 | 9588-805-0725 | 4.00 ppb |
2015-04-23 | 9588-806-0745 | 5.70 ppb |
2015-04-23 | 9588-807-0940 | 6.20 ppb |
2015-05-18 | 9588-014-0915 | ND |
2015-07-27 | 9588-800-1025 | 5.20 ppb |
2015-07-27 | 9588-801-0920 | 6.60 ppb |
2015-07-27 | 9588-802-0910 | 4.90 ppb |
2015-07-27 | 9588-803-0945 | 5.50 ppb |
2015-07-27 | 9588-804-1210 | 6.20 ppb |
2015-07-27 | 9588-805-0935 | 6.10 ppb |
2015-07-27 | 9588-806-1000 | 7.10 ppb |
2015-07-27 | 9588-807-1150 | 3.00 ppb |
2015-10-28 | 9588-800-0930 | ND |
2015-10-28 | 9588-801-0830 | 6.40 ppb |
2015-10-28 | 9588-802-0815 | 4.90 ppb |
2015-10-28 | 9588-803-0855 | 6.60 ppb |
2015-10-28 | 9588-804-0800 | 5.30 ppb |
2015-10-28 | 9588-805-0840 | ND |
2015-10-28 | 9588-806-0910 | 2.60 ppb |
2015-10-28 | 9588-807-1055 | 6.70 ppb |
2016-01-25 | 9588-800-0840 | 8.30 ppb |
2016-01-25 | 9588-801-0740 | 11.0 ppb |
2016-01-25 | 9588-802-0725 | 19.0 ppb |
2016-01-25 | 9588-803-0810 | 8.70 ppb |
2016-01-25 | 9588-804-1240 | 18.0 ppb |
2016-01-25 | 9588-805-0800 | 9.70 ppb |
2016-01-25 | 9588-806-0820 | 7.40 ppb |
2016-01-25 | 9588-807-1220 | 8.10 ppb |
2016-02-16 | 9588-051-0825 | ND |
2016-04-27 | 9588-800-0835 | 2.90 ppb |
2016-04-27 | 9588-801-0740 | 3.20 ppb |
2016-04-27 | 9588-802-0730 | 7.00 ppb |
2016-04-27 | 9588-803-0805 | 3.60 ppb |
2016-04-27 | 9588-804-1040 | 5.20 ppb |
2016-04-27 | 9588-805-0750 | 1.80 ppb |
2016-04-27 | 9588-806-0815 | 2.80 ppb |
2016-04-27 | 9588-807-1015 | 2.60 ppb |
2016-05-12 | 9588-014-0925 | ND |
2016-07-25 | 9588-800-0830 | 5.50 ppb |
2016-07-25 | 9588-801-0725 | 4.10 ppb |
2016-07-25 | 9588-802-0710 | 4.90 ppb |
2016-07-25 | 9588-803-0750 | 4.90 ppb |
2016-07-25 | 9588-804-1210 | 4.20 ppb |
2016-07-25 | 9588-805-0745 | 4.10 ppb |
2016-07-25 | 9588-806-0800 | 3.90 ppb |
2016-07-25 | 9588-807-1140 | 4.20 ppb |
2016-10-25 | 9588-800-0830 | 2.40 ppb |
2016-10-25 | 9588-801-0730 | 5.20 ppb |
2016-10-25 | 9588-802-0720 | 5.40 ppb |
2016-10-25 | 9588-803-0800 | 6.20 ppb |
2016-10-25 | 9588-804-1230 | 4.90 ppb |
2016-10-25 | 9588-805-0750 | 5.70 ppb |
2016-10-25 | 9588-806-0810 | 2.90 ppb |
2016-10-25 | 9588-807-1205 | 5.60 ppb |
2017-01-05 | 9588-051-0800 | ND |
2017-01-27 | 9588-800-0815 | 6.40 ppb |
2017-01-27 | 9588-801-0725 | 6.50 ppb |
2017-01-27 | 9588-802-0715 | 7.20 ppb |
2017-01-27 | 9588-803-0745 | 7.30 ppb |
2017-01-27 | 9588-804-1015 | 8.40 ppb |
2017-01-27 | 9588-805-0735 | 6.60 ppb |
2017-01-27 | 9588-806-0755 | 6.30 ppb |
2017-01-27 | 9588-807-0955 | 4.40 ppb |
2017-04-25 | 9588-800-0830 | ND |
2017-04-25 | 9588-801-0720 | ND |
2017-04-25 | 9588-802-0710 | ND |
2017-04-25 | 9588-803-0800 | ND |
2017-04-25 | 9588-804-1225 | ND |
2017-04-25 | 9588-805-0745 | ND |
2017-04-25 | 9588-806-0810 | ND |
2017-04-25 | 9588-807-1200 | ND |
2017-05-15 | 9588-014-0905 | ND |
2017-07-25 | 9588-800-1420 | ND |
2017-07-25 | 9588-801-1505 | ND |
2017-07-25 | 9588-802-1520 | ND |
2017-07-25 | 9588-803-1450 | ND |
2017-07-25 | 9588-804-1545 | ND |
2017-07-25 | 9588-805-1435 | ND |
2017-07-25 | 9588-806-1405 | 1.20 ppb |
2017-07-25 | 9588-807-1355 | ND |
2017-10-27 | 9588-800-0830 | ND |
2017-10-27 | 9588-801-0735 | 2.50 ppb |
2017-10-27 | 9588-802-0725 | 2.40 ppb |
2017-10-27 | 9588-803-0800 | 2.50 ppb |
2017-10-27 | 9588-804-1025 | 2.80 ppb |
2017-10-27 | 9588-805-0745 | 3.80 ppb |
2017-10-27 | 9588-806-0810 | 2.70 ppb |
2017-10-27 | 9588-807-1010 | 2.60 ppb |
2018-01-26 | 9588-800-0840 | 4.00 ppb |
2018-01-26 | 9588-801-0730 | 3.80 ppb |
2018-01-26 | 9588-802-0720 | 5.30 ppb |
2018-01-26 | 9588-803-0800 | 4.20 ppb |
2018-01-26 | 9588-804-1040 | 4.70 ppb |
2018-01-26 | 9588-805-0745 | 5.60 ppb |
2018-01-26 | 9588-806-0815 | 5.50 ppb |
2018-01-26 | 9588-807-1020 | 4.40 ppb |
2018-02-15 | 9588-051-1045 | ND |
2018-04-25 | 9588-800-0830 | 1.80 ppb |
2018-04-25 | 9588-801-0720 | 4.80 ppb |
2018-04-25 | 9588-802-0710 | 3.70 ppb |
2018-04-25 | 9588-803-0755 | 3.40 ppb |
2018-04-25 | 9588-804-1150 | 3.80 ppb |
2018-04-25 | 9588-805-0740 | 4.20 ppb |
2018-04-25 | 9588-806-0810 | 3.70 ppb |
2018-04-25 | 9588-807-1135 | 4.20 ppb |
2018-05-16 | 9588-014-0855 | ND |
2018-07-27 | 9588-800-0730 | 4.30 ppb |
2018-07-27 | 9588-801-0645 | 3.50 ppb |
2018-07-27 | 9588-802-0635 | 3.50 ppb |
2018-07-27 | 9588-803-0705 | 3.70 ppb |
2018-07-27 | 9588-804-0910 | 3.80 ppb |
2018-07-27 | 9588-805-0655 | 3.90 ppb |
2018-07-27 | 9588-806-0715 | 3.80 ppb |
2018-07-27 | 9588-807-0855 | 3.90 ppb |
2018-10-26 | 9588-800-0855 | 5.60 ppb |
2018-10-26 | 9588-801-0740 | 2.80 ppb |
2018-10-26 | 9588-802-0730 | 2.50 ppb |
2018-10-26 | 9588-803-0815 | 2.40 ppb |
2018-10-26 | 9588-804-1100 | 3.00 ppb |
2018-10-26 | 9588-805-0805 | 2.40 ppb |
2018-10-26 | 9588-806-0825 | 2.20 ppb |
2018-10-26 | 9588-807-1045 | 2.80 ppb |
2019-01-25 | 9588-800-0925 | 8.30 ppb |
2019-01-25 | 9588-801-0805 | 3.40 ppb |
2019-01-25 | 9588-802-0750 | 4.50 ppb |
2019-01-25 | 9588-803-0845 | 4.00 ppb |
2019-01-25 | 9588-804-1145 | 4.10 ppb |
2019-01-25 | 9588-805-0835 | 3.80 ppb |
2019-01-25 | 9588-806-0900 | 3.50 ppb |
2019-01-25 | 9588-807-1130 | 5.50 ppb |
2019-02-11 | 9588-051-0835 | ND |
2019-04-24 | 9588-800-0815 | ND |
2019-04-24 | 9588-801-0710 | 1.40 ppb |
2019-04-24 | 9588-802-0700 | 1.10 ppb |
2019-04-24 | 9588-803-0735 | 1.20 ppb |
2019-04-24 | 9588-804-1000 | 1.30 ppb |
2019-04-24 | 9588-805-0720 | ND |
2019-04-24 | 9588-806-0750 | 1.40 ppb |
2019-04-24 | 9588-807-0945 | ND |
2019-06-12 | 9588-014-0830 | ND |
2019-07-24 | 9588-800-0825 | ND |
2019-07-24 | 9588-801-0730 | 1.30 ppb |
2019-07-24 | 9588-802-0715 | 1.20 ppb |
2019-07-24 | 9588-803-0750 | 1.60 ppb |
2019-07-24 | 9588-804-1020 | 1.40 ppb |
2019-07-24 | 9588-805-0740 | ND |
2019-07-24 | 9588-806-0800 | 1.20 ppb |
2019-07-24 | 9588-807-1005 | 1.000 ppb |
2019-10-25 | 9588-800-0820 | ND |
2019-10-25 | 9588-801-0710 | 1.60 ppb |
2019-10-25 | 9588-802-0700 | 1.60 ppb |
2019-10-25 | 9588-803-0740 | 1.80 ppb |
2019-10-25 | 9588-804-1155 | 2.10 ppb |
2019-10-25 | 9588-805-0730 | 1.80 ppb |
2019-10-25 | 9588-806-0750 | 2.10 ppb |
2019-10-25 | 9588-807-1135 | 1.80 ppb |