Dibromochloromethane
Los Angeles County WW District 4 & 34-Lancaster
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 8.69 ppb | 58 | 32 | ND - 35.7 ppb |
2015 | 12.9 ppb | 56 | 31 | ND - 41.9 ppb |
2016 | 10.8 ppb | 53 | 30 | ND - 47.9 ppb |
2017 | 6.78 ppb | 19 | 16 | ND - 28.8 ppb |
2018 | ND | 4 | 0 | ND |
2019 | ND | 26 | 0 | ND |
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 |
---|---|---|
2014-01-10 | 5442-800-1126 | 13.0 ppb |
2014-01-10 | 5442-801-1012 | 20.7 ppb |
2014-01-10 | 5442-802-1027 | 2.45 ppb |
2014-01-10 | 5442-803-0956 | 20.1 ppb |
2014-01-10 | 5442-804-0925 | 20.2 ppb |
2014-01-10 | 5442-805-0844 | 22.7 ppb |
2014-01-10 | 5442-806-1102 | 16.3 ppb |
2014-01-10 | 5442-807-0908 | 18.4 ppb |
2014-03-18 | 5442-011-0830 | ND |
2014-04-08 | 5442-802-1245 | 4.80 ppb |
2014-04-08 | 5442-803-1005 | 3.70 ppb |
2014-04-08 | 5442-804-0915 | 11.0 ppb |
2014-04-08 | 5442-805-0830 | 17.0 ppb |
2014-04-08 | 5442-807-0905 | 10.00 ppb |
2014-04-09 | 5442-093-1000 | ND |
2014-04-09 | 5442-800-0950 | 27.0 ppb |
2014-04-09 | 5442-801-0910 | ND |
2014-04-09 | 5442-806-0930 | 16.0 ppb |
2014-06-17 | 5442-069-0900 | ND |
2014-06-17 | 5442-070-0912 | ND |
2014-07-07 | 5442-800-0900 | 15.5 ppb |
2014-07-07 | 5442-806-0835 | 35.2 ppb |
2014-07-08 | 5442-048-0902 | ND |
2014-07-08 | 5442-062-0856 | ND |
2014-07-08 | 5442-801-1040 | 6.06 ppb |
2014-07-08 | 5442-802-1207 | 24.7 ppb |
2014-07-08 | 5442-803-0930 | 20.6 ppb |
2014-07-08 | 5442-804-0845 | 22.9 ppb |
2014-07-08 | 5442-805-0800 | 35.7 ppb |
2014-07-08 | 5442-807-0835 | 17.8 ppb |
2014-07-09 | 5442-041-0907 | ND |
2014-07-09 | 5442-045-1024 | ND |
2014-07-10 | 5442-071-1100 | ND |
2014-07-10 | 5442-094-1000 | ND |
2014-07-10 | 5442-095-1007 | ND |
2014-07-17 | 5442-067-1026 | ND |
2014-07-22 | 5442-002-1150 | ND |
2014-07-22 | 5442-036-0904 | ND |
2014-07-22 | 5442-040-0855 | ND |
2014-07-22 | 5442-053-1120 | ND |
2014-07-22 | 5442-054-1135 | ND |
2014-07-22 | 5442-055-0947 | ND |
2014-07-24 | 5442-063-1110 | ND |
2014-08-19 | 5442-035-1015 | ND |
2014-08-26 | 5442-037-0845 | ND |
2014-09-09 | 5442-016-1100 | ND |
2014-09-09 | 5442-023-1100 | ND |
2014-09-30 | 5442-026-0855 | ND |
2014-09-30 | 5442-028-0940 | ND |
2014-10-06 | 5442-800-1318 | 14.3 ppb |
2014-10-06 | 5442-806-0830 | 0.940 ppb |
2014-10-07 | 5442-801-1044 | 7.14 ppb |
2014-10-07 | 5442-802-1156 | 8.69 ppb |
2014-10-07 | 5442-803-0940 | 9.31 ppb |
2014-10-07 | 5442-804-0859 | 18.8 ppb |
2014-10-07 | 5442-805-0820 | 23.2 ppb |
2014-10-07 | 5442-807-0850 | 18.7 ppb |
2014-10-08 | 5442-806-1339 | 1.18 ppb |
2015-01-12 | 5442-800-1305 | 19.9 ppb |
2015-01-12 | 5442-806-1331 | 23.0 ppb |
2015-01-13 | 5442-801-1050 | ND |
2015-01-13 | 5442-802-1230 | 4.00 ppb |
2015-01-13 | 5442-803-0950 | 5.97 ppb |
2015-01-13 | 5442-804-0910 | 10.3 ppb |
2015-01-13 | 5442-805-0830 | 13.3 ppb |
2015-01-13 | 5442-807-0910 | 8.66 ppb |
2015-03-04 | 5442-011-1020 | ND |
2015-04-07 | 5442-093-0918 | ND |
2015-04-08 | 5442-800-1020 | 33.3 ppb |
2015-04-08 | 5442-801-1112 | 41.9 ppb |
2015-04-08 | 5442-802-1056 | 3.61 ppb |
2015-04-08 | 5442-803-1130 | 7.97 ppb |
2015-04-08 | 5442-804-1143 | 27.9 ppb |
2015-04-08 | 5442-805-1307 | 22.9 ppb |
2015-04-08 | 5442-806-1045 | 33.7 ppb |
2015-04-08 | 5442-807-1151 | 30.3 ppb |
2015-04-14 | 5442-068-1110 | ND |
2015-06-02 | 5442-069-1100 | ND |
2015-06-02 | 5442-070-1010 | ND |
2015-07-06 | 5442-028-1150 | ND |
2015-07-06 | 5442-048-1115 | ND |
2015-07-06 | 5442-062-1120 | ND |
2015-07-07 | 5442-026-0850 | ND |
2015-07-07 | 5442-041-0828 | ND |
2015-07-07 | 5442-045-0938 | ND |
2015-07-07 | 5442-802-1230 | 14.7 ppb |
2015-07-07 | 5442-803-1000 | 32.9 ppb |
2015-07-07 | 5442-804-0945 | 35.5 ppb |
2015-07-07 | 5442-805-1440 | 41.7 ppb |
2015-07-07 | 5442-807-1330 | 32.8 ppb |
2015-07-08 | 5442-067-0922 | ND |
2015-07-08 | 5442-071-1100 | ND |
2015-07-08 | 5442-095-1145 | ND |
2015-07-08 | 5442-806-1230 | 33.1 ppb |
2015-07-13 | 5442-040-0850 | ND |
2015-07-14 | 5442-053-0945 | ND |
2015-07-14 | 5442-054-0930 | ND |
2015-07-15 | 5442-800-1140 | 25.8 ppb |
2015-07-15 | 5442-801-0844 | 29.4 ppb |
2015-07-27 | 5442-055-1155 | ND |
2015-08-12 | 5442-035-0925 | ND |
2015-08-12 | 5442-036-0910 | ND |
2015-08-18 | 5442-037-0930 | ND |
2015-09-21 | 5442-016-0856 | ND |
2015-09-21 | 5442-023-0905 | ND |
2015-10-07 | 5442-800-1310 | 14.8 ppb |
2015-10-07 | 5442-802-1238 | 4.14 ppb |
2015-10-07 | 5442-803-0917 | 34.3 ppb |
2015-10-07 | 5442-804-0907 | 34.7 ppb |
2015-10-07 | 5442-805-0828 | 28.8 ppb |
2015-10-07 | 5442-806-1325 | 32.0 ppb |
2015-10-07 | 5442-807-0850 | 26.5 ppb |
2015-11-12 | 5442-801-1030 | 12.3 ppb |
2015-12-16 | 5442-094-1015 | ND |
2016-01-11 | 5442-800-1235 | 8.67 ppb |
2016-01-11 | 5442-806-1257 | 11.9 ppb |
2016-01-13 | 5442-801-1053 | 9.34 ppb |
2016-01-13 | 5442-802-1119 | 8.16 ppb |
2016-01-13 | 5442-803-1034 | 7.96 ppb |
2016-01-13 | 5442-804-0922 | 15.7 ppb |
2016-01-13 | 5442-805-0821 | 19.4 ppb |
2016-01-13 | 5442-807-0904 | 15.2 ppb |
2016-01-19 | 5442-035-0950 | ND |
2016-01-19 | 5442-040-0945 | ND |
2016-01-25 | 5442-028-0840 | ND |
2016-01-25 | 5442-048-0940 | ND |
2016-01-25 | 5442-062-0930 | ND |
2016-01-26 | 5442-093-1100 | ND |
2016-02-09 | 5442-069-1010 | ND |
2016-02-09 | 5442-070-1110 | ND |
2016-02-10 | 5442-071-1125 | ND |
2016-03-09 | 5442-023-1041 | ND |
2016-03-28 | 5442-011-1138 | ND |
2016-03-28 | 5442-055-1126 | ND |
2016-03-28 | 5442-067-0856 | ND |
2016-04-14 | 5442-800-1005 | 21.9 ppb |
2016-04-14 | 5442-801-1103 | 18.4 ppb |
2016-04-14 | 5442-802-1045 | 7.57 ppb |
2016-04-14 | 5442-803-1118 | 26.9 ppb |
2016-04-14 | 5442-804-1135 | 28.4 ppb |
2016-04-14 | 5442-805-1207 | 15.5 ppb |
2016-04-14 | 5442-806-1023 | 25.0 ppb |
2016-04-14 | 5442-807-1146 | 19.8 ppb |
2016-04-20 | 5442-026-1016 | ND |
2016-04-20 | 5442-041-0934 | ND |
2016-06-08 | 5442-036-0945 | ND |
2016-06-27 | 5442-094-1125 | ND |
2016-06-27 | 5442-095-1050 | ND |
2016-06-28 | 5442-037-1132 | ND |
2016-06-28 | 5442-053-1155 | ND |
2016-06-28 | 5442-054-1152 | ND |
2016-07-15 | 5442-800-1056 | 17.1 ppb |
2016-07-15 | 5442-801-0958 | 15.8 ppb |
2016-07-15 | 5442-802-1018 | 37.8 ppb |
2016-07-15 | 5442-803-0936 | 29.9 ppb |
2016-07-15 | 5442-804-0916 | 47.9 ppb |
2016-07-15 | 5442-805-0842 | 35.2 ppb |
2016-07-15 | 5442-806-1115 | 29.5 ppb |
2016-07-15 | 5442-807-0901 | 23.8 ppb |
2016-08-31 | 5442-016-1105 | ND |
2016-10-13 | 5442-802-1243 | 8.01 ppb |
2016-10-13 | 5442-804-1203 | 18.7 ppb |
2016-10-14 | 5442-800-1036 | 13.3 ppb |
2016-10-14 | 5442-801-0905 | 9.82 ppb |
2016-10-14 | 5442-802-0936 | 4.84 ppb |
2016-10-14 | 5442-806-1011 | 19.0 ppb |
2016-12-15 | 5442-045-0911 | ND |
2017-01-11 | 5442-802-1112 | 1.96 ppb |
2017-01-11 | 5442-803-1056 | 4.88 ppb |
2017-01-12 | 5442-804-1051 | 11.3 ppb |
2017-01-12 | 5442-805-1020 | 17.1 ppb |
2017-01-12 | 5442-806-1115 | 2.40 ppb |
2017-01-12 | 5442-807-1038 | 14.8 ppb |
2017-01-25 | 5442-800-1245 | 28.8 ppb |
2017-01-25 | 5442-801-1020 | 24.9 ppb |
2017-07-10 | 9588-800-0802 | 2.30 ppb |
2017-07-10 | 9588-801-0904 | 2.20 ppb |
2017-07-10 | 9588-802-0833 | 2.20 ppb |
2017-07-10 | 9588-803-0949 | 3.40 ppb |
2017-07-10 | 9588-804-1012 | 3.50 ppb |
2017-07-10 | 9588-805-1015 | 3.20 ppb |
2017-07-10 | 9588-806-1112 | 2.60 ppb |
2017-07-10 | 9588-807-0926 | 3.30 ppb |
2017-07-18 | 9588-063-0950 | ND |
2017-11-21 | 9590-045-0935 | ND |
2017-12-27 | 2920-068-0935 | ND |
2018-02-28 | 9590-037-1000 | ND |
2018-02-28 | 9590-053-1035 | ND |
2018-02-28 | 9590-054-1030 | ND |
2018-12-26 | 9590-063-1055 | ND |
2019-01-07 | 9590-093-1706 | ND |
2019-01-08 | 9590-023-1115 | ND |
2019-01-08 | 9590-026-1025 | ND |
2019-01-08 | 9590-045-1020 | ND |
2019-02-06 | 9590-067-1100 | ND |
2019-02-11 | 9590-070-1125 | ND |
2019-02-11 | 9590-071-1120 | ND |
2019-02-19 | 9590-011-1145 | ND |
2019-02-26 | 9590-028-1150 | ND |
2019-02-26 | 9590-048-1225 | ND |
2019-02-26 | 9590-062-1210 | ND |
2019-02-26 | 9590-063-1210 | ND |
2019-03-13 | 9590-036-1035 | ND |
2019-03-13 | 9590-094-0920 | ND |
2019-03-13 | 9590-095-0925 | ND |
2019-03-13 | 9590-095-0940 | ND |
2019-03-19 | 9590-035-1120 | ND |
2019-03-19 | 9590-040-1145 | ND |
2019-03-19 | 9590-041-0930 | ND |
2019-03-19 | 9590-053-1315 | ND |
2019-03-19 | 9590-054-1300 | ND |
2019-03-26 | 9590-069-0945 | ND |
2019-06-19 | 9590-037-1000 | ND |
2019-08-12 | 9590-055-1040 | ND |
2019-08-19 | 9590-023-1020 | ND |
2019-12-23 | 9590-095-0933 | ND |