Bromoform
El Segundo Water Department
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 2.39 ppb | 32 | 32 | 1.90 ppb - 2.90 ppb |
2015 | 3.03 ppb | 32 | 32 | 1.40 ppb - 4.20 ppb |
2016 | 4.00 ppb | 32 | 32 | 3.00 ppb - 8.40 ppb |
2017 | 4.44 ppb | 32 | 26 | ND - 9.40 ppb |
2018 | 3.10 ppb | 24 | 24 | 2.30 ppb - 4.30 ppb |
2019 | 4.03 ppb | 32 | 32 | 1.90 ppb - 7.00 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 |
---|---|---|
2014-01-08 | 3761-800-0845 | 2.30 ppb |
2014-01-08 | 3761-801-0754 | 2.30 ppb |
2014-01-08 | 3761-802-0943 | 2.20 ppb |
2014-01-08 | 3761-803-1007 | 2.10 ppb |
2014-01-08 | 3761-804-1111 | 2.30 ppb |
2014-01-08 | 3761-805-1124 | 2.20 ppb |
2014-01-08 | 3761-806-1140 | 2.10 ppb |
2014-01-08 | 3761-807-1207 | 2.40 ppb |
2014-04-02 | 3761-800-0752 | 2.70 ppb |
2014-04-02 | 3761-801-0703 | 2.90 ppb |
2014-04-02 | 3761-802-0914 | 2.90 ppb |
2014-04-02 | 3761-803-0933 | 2.70 ppb |
2014-04-02 | 3761-804-0949 | 2.90 ppb |
2014-04-02 | 3761-805-1043 | 2.70 ppb |
2014-04-02 | 3761-806-1026 | 2.90 ppb |
2014-04-02 | 3761-807-1103 | 2.80 ppb |
2014-07-02 | 3761-800-0857 | 2.30 ppb |
2014-07-02 | 3761-801-0726 | 2.40 ppb |
2014-07-02 | 3761-802-0917 | 2.50 ppb |
2014-07-02 | 3761-803-0946 | 2.00 ppb |
2014-07-02 | 3761-804-1030 | 2.30 ppb |
2014-07-02 | 3761-805-1132 | 2.20 ppb |
2014-07-02 | 3761-806-1118 | 2.80 ppb |
2014-07-02 | 3761-807-1148 | 2.60 ppb |
2014-10-01 | 3761-800-0805 | 2.20 ppb |
2014-10-01 | 3761-801-0727 | 2.20 ppb |
2014-10-01 | 3761-802-0920 | 2.20 ppb |
2014-10-01 | 3761-803-0938 | 2.40 ppb |
2014-10-01 | 3761-804-1003 | 2.10 ppb |
2014-10-01 | 3761-805-1027 | 2.00 ppb |
2014-10-01 | 3761-806-1040 | 1.90 ppb |
2014-10-01 | 3761-807-1113 | 2.00 ppb |
2015-01-14 | 3761-800-0800 | 3.70 ppb |
2015-01-14 | 3761-801-0733 | 3.70 ppb |
2015-01-14 | 3761-802-0925 | 3.80 ppb |
2015-01-14 | 3761-803-0947 | 3.70 ppb |
2015-01-14 | 3761-804-1017 | 3.70 ppb |
2015-01-14 | 3761-805-1119 | 3.30 ppb |
2015-01-14 | 3761-806-1100 | 3.40 ppb |
2015-01-14 | 3761-807-1130 | 3.70 ppb |
2015-04-01 | 3761-800-0745 | 3.60 ppb |
2015-04-01 | 3761-801-0717 | 3.60 ppb |
2015-04-01 | 3761-802-0915 | 4.20 ppb |
2015-04-01 | 3761-803-0935 | 3.70 ppb |
2015-04-01 | 3761-804-0953 | 3.80 ppb |
2015-04-01 | 3761-805-1025 | 4.00 ppb |
2015-04-01 | 3761-806-1037 | 4.10 ppb |
2015-04-01 | 3761-807-1103 | 3.80 ppb |
2015-07-15 | 3761-800-0758 | 2.30 ppb |
2015-07-15 | 3761-801-0715 | 2.90 ppb |
2015-07-15 | 3761-802-0910 | 2.60 ppb |
2015-07-15 | 3761-803-0930 | 2.80 ppb |
2015-07-15 | 3761-804-1000 | 2.50 ppb |
2015-07-15 | 3761-805-1020 | 2.60 ppb |
2015-07-15 | 3761-806-1037 | 2.80 ppb |
2015-07-15 | 3761-807-1110 | 2.60 ppb |
2015-10-07 | 3761-800-0830 | 1.80 ppb |
2015-10-07 | 3761-801-0752 | 1.90 ppb |
2015-10-07 | 3761-802-0922 | 1.60 ppb |
2015-10-07 | 3761-803-0937 | 1.40 ppb |
2015-10-07 | 3761-804-1010 | 3.00 ppb |
2015-10-07 | 3761-805-1017 | 1.50 ppb |
2015-10-07 | 3761-806-1040 | 3.20 ppb |
2015-10-07 | 3761-807-1105 | 1.80 ppb |
2016-01-13 | 3761-800-0745 | 3.50 ppb |
2016-01-13 | 3761-801-0712 | 3.20 ppb |
2016-01-13 | 3761-802-0856 | 3.00 ppb |
2016-01-13 | 3761-803-0928 | 3.30 ppb |
2016-01-13 | 3761-804-0949 | 3.10 ppb |
2016-01-13 | 3761-805-1002 | 3.00 ppb |
2016-01-13 | 3761-806-1017 | 3.20 ppb |
2016-01-13 | 3761-807-1050 | 3.30 ppb |
2016-04-13 | 3761-800-0838 | 3.80 ppb |
2016-04-13 | 3761-801-0749 | 3.70 ppb |
2016-04-13 | 3761-802-1027 | 3.80 ppb |
2016-04-13 | 3761-803-1053 | 4.20 ppb |
2016-04-13 | 3761-804-1131 | 4.30 ppb |
2016-04-13 | 3761-805-1147 | 4.70 ppb |
2016-04-13 | 3761-806-1210 | 4.00 ppb |
2016-04-13 | 3761-807-1235 | 3.60 ppb |
2016-07-06 | 3761-800-0800 | 3.60 ppb |
2016-07-06 | 3761-801-0730 | 4.30 ppb |
2016-07-06 | 3761-802-0923 | 3.90 ppb |
2016-07-06 | 3761-803-0943 | 4.20 ppb |
2016-07-06 | 3761-804-1010 | 4.00 ppb |
2016-07-06 | 3761-805-1026 | 3.80 ppb |
2016-07-06 | 3761-806-1041 | 4.20 ppb |
2016-07-06 | 3761-807-1107 | 4.10 ppb |
2016-10-05 | 3761-800-0806 | 8.40 ppb |
2016-10-05 | 3761-801-0725 | 3.40 ppb |
2016-10-05 | 3761-802-0945 | 3.90 ppb |
2016-10-05 | 3761-803-0957 | 3.50 ppb |
2016-10-05 | 3761-804-1012 | 6.20 ppb |
2016-10-05 | 3761-805-1050 | 3.80 ppb |
2016-10-05 | 3761-806-1034 | 4.70 ppb |
2016-10-05 | 3761-807-1100 | 4.20 ppb |
2017-01-04 | 3761-800-0725 | 2.20 ppb |
2017-01-04 | 3761-801-0805 | 2.50 ppb |
2017-01-04 | 3761-802-0915 | 2.20 ppb |
2017-01-04 | 3761-803-0930 | 2.70 ppb |
2017-01-04 | 3761-804-0955 | 2.20 ppb |
2017-01-04 | 3761-805-1010 | 2.30 ppb |
2017-01-04 | 3761-806-1020 | 2.40 ppb |
2017-01-04 | 3761-807-1045 | 2.50 ppb |
2017-04-05 | 3761-800-0740 | ND |
2017-04-05 | 3761-801-0815 | ND |
2017-04-05 | 3761-802-0940 | ND |
2017-04-05 | 3761-803-0955 | ND |
2017-04-05 | 3761-804-1035 | 1.20 ppb |
2017-04-05 | 3761-805-1045 | 1.30 ppb |
2017-04-05 | 3761-806-1100 | ND |
2017-04-05 | 3761-807-1110 | ND |
2017-07-12 | 3761-800-0804 | 8.70 ppb |
2017-07-12 | 3761-801-0741 | 8.50 ppb |
2017-07-12 | 3761-802-0926 | 8.50 ppb |
2017-07-12 | 3761-803-0959 | 9.40 ppb |
2017-07-12 | 3761-804-1016 | 8.80 ppb |
2017-07-12 | 3761-805-1030 | 8.50 ppb |
2017-07-12 | 3761-806-1115 | 8.30 ppb |
2017-07-12 | 3761-807-1133 | 8.40 ppb |
2017-10-04 | 3761-800-0757 | 5.30 ppb |
2017-10-04 | 3761-801-0810 | 6.40 ppb |
2017-10-04 | 3761-802-0950 | 6.40 ppb |
2017-10-04 | 3761-803-1015 | 7.70 ppb |
2017-10-04 | 3761-804-1054 | 7.70 ppb |
2017-10-04 | 3761-805-1110 | 5.50 ppb |
2017-10-04 | 3761-806-1140 | 6.60 ppb |
2017-10-04 | 3761-807-1212 | 5.90 ppb |
2018-01-03 | 3761-800-0706 | 2.80 ppb |
2018-01-03 | 3761-801-0736 | 3.10 ppb |
2018-01-03 | 3761-802-0835 | 2.90 ppb |
2018-01-03 | 3761-803-0845 | 3.30 ppb |
2018-01-03 | 3761-804-0856 | 3.40 ppb |
2018-01-03 | 3761-805-0910 | 3.40 ppb |
2018-01-03 | 3761-806-0937 | 3.20 ppb |
2018-01-03 | 3761-807-0950 | 3.40 ppb |
2018-07-18 | 3761-800-0715 | 2.70 ppb |
2018-07-18 | 3761-801-0737 | 2.80 ppb |
2018-07-18 | 3761-802-0843 | 3.80 ppb |
2018-07-18 | 3761-803-0900 | 3.60 ppb |
2018-07-18 | 3761-804-0922 | 3.30 ppb |
2018-07-18 | 3761-805-0932 | 3.10 ppb |
2018-07-18 | 3761-806-1012 | 2.40 ppb |
2018-07-18 | 3761-807-1026 | 2.30 ppb |
2018-10-03 | 3761-800-0821 | 4.00 ppb |
2018-10-03 | 3761-801-0802 | 4.30 ppb |
2018-10-03 | 3761-802-0908 | 2.70 ppb |
2018-10-03 | 3761-803-0921 | 2.70 ppb |
2018-10-03 | 3761-804-0938 | 2.90 ppb |
2018-10-03 | 3761-805-0948 | 2.90 ppb |
2018-10-03 | 3761-806-1007 | 2.80 ppb |
2018-10-03 | 3761-807-1028 | 2.50 ppb |
2019-01-09 | 3761-800-1015 | 3.40 ppb |
2019-01-09 | 3761-801-0625 | 4.10 ppb |
2019-01-09 | 3761-802-1035 | 3.80 ppb |
2019-01-09 | 3761-803-1046 | 3.70 ppb |
2019-01-09 | 3761-804-1056 | 4.20 ppb |
2019-01-09 | 3761-805-1109 | 3.90 ppb |
2019-01-09 | 3761-806-1117 | 3.70 ppb |
2019-01-09 | 3761-807-1124 | 3.70 ppb |
2019-04-03 | 3761-800-0824 | 5.60 ppb |
2019-04-03 | 3761-801-0847 | 5.20 ppb |
2019-04-03 | 3761-802-0936 | 5.60 ppb |
2019-04-03 | 3761-803-0945 | 5.00 ppb |
2019-04-03 | 3761-804-0959 | 4.60 ppb |
2019-04-03 | 3761-805-1007 | 5.00 ppb |
2019-04-03 | 3761-806-1019 | 4.80 ppb |
2019-04-03 | 3761-807-1038 | 5.40 ppb |
2019-07-03 | 3761-800-0809 | 7.00 ppb |
2019-07-03 | 3761-801-0737 | 3.60 ppb |
2019-07-03 | 3761-802-0910 | 5.00 ppb |
2019-07-03 | 3761-803-0925 | 5.30 ppb |
2019-07-03 | 3761-804-0950 | 4.00 ppb |
2019-07-03 | 3761-805-1000 | 4.00 ppb |
2019-07-03 | 3761-806-1014 | 3.90 ppb |
2019-07-03 | 3761-807-1034 | 4.70 ppb |
2019-10-02 | 3761-800-0747 | 2.50 ppb |
2019-10-02 | 3761-801-0724 | 2.30 ppb |
2019-10-02 | 3761-802-0830 | 3.00 ppb |
2019-10-02 | 3761-803-0842 | 3.10 ppb |
2019-10-02 | 3761-804-0858 | 1.90 ppb |
2019-10-02 | 3761-805-0910 | 2.10 ppb |
2019-10-02 | 3761-806-0920 | 2.20 ppb |
2019-10-02 | 3761-807-0938 | 2.50 ppb |