Bromodichloromethane
Los Angeles County WW District 4 & 34-Lancaster
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 3.04 ppb | 58 | 30 | ND - 17.8 ppb |
2015 | 5.25 ppb | 56 | 31 | ND - 19.2 ppb |
2016 | 5.84 ppb | 53 | 30 | ND - 37.8 ppb |
2017 | 4.23 ppb | 19 | 16 | ND - 12.5 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 0.06 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 |
---|---|---|
2014-01-10 | 5442-800-1126 | 2.76 ppb |
2014-01-10 | 5442-801-1012 | 4.90 ppb |
2014-01-10 | 5442-802-1027 | 1.04 ppb |
2014-01-10 | 5442-803-0956 | 5.26 ppb |
2014-01-10 | 5442-804-0925 | 5.13 ppb |
2014-01-10 | 5442-805-0844 | 5.80 ppb |
2014-01-10 | 5442-806-1102 | 3.55 ppb |
2014-01-10 | 5442-807-0908 | 4.50 ppb |
2014-03-18 | 5442-011-0830 | ND |
2014-04-08 | 5442-802-1245 | 2.00 ppb |
2014-04-08 | 5442-803-1005 | 1.50 ppb |
2014-04-08 | 5442-804-0915 | 4.60 ppb |
2014-04-08 | 5442-805-0830 | 6.90 ppb |
2014-04-08 | 5442-807-0905 | 4.40 ppb |
2014-04-09 | 5442-093-1000 | ND |
2014-04-09 | 5442-800-0950 | 9.70 ppb |
2014-04-09 | 5442-801-0910 | ND |
2014-04-09 | 5442-806-0930 | 5.20 ppb |
2014-06-17 | 5442-069-0900 | ND |
2014-06-17 | 5442-070-0912 | ND |
2014-07-07 | 5442-800-0900 | 5.56 ppb |
2014-07-07 | 5442-806-0835 | 12.2 ppb |
2014-07-08 | 5442-048-0902 | ND |
2014-07-08 | 5442-062-0856 | ND |
2014-07-08 | 5442-801-1040 | 2.80 ppb |
2014-07-08 | 5442-802-1207 | 9.98 ppb |
2014-07-08 | 5442-803-0930 | 8.21 ppb |
2014-07-08 | 5442-804-0845 | 9.45 ppb |
2014-07-08 | 5442-805-0800 | 17.8 ppb |
2014-07-08 | 5442-807-0835 | 7.44 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 | 4.61 ppb |
2014-10-06 | 5442-806-0830 | ND |
2014-10-07 | 5442-801-1044 | 2.13 ppb |
2014-10-07 | 5442-802-1156 | 2.94 ppb |
2014-10-07 | 5442-803-0940 | 3.51 ppb |
2014-10-07 | 5442-804-0859 | 7.31 ppb |
2014-10-07 | 5442-805-0820 | 8.58 ppb |
2014-10-07 | 5442-807-0850 | 6.82 ppb |
2014-10-08 | 5442-806-1339 | ND |
2015-01-12 | 5442-800-1305 | 5.34 ppb |
2015-01-12 | 5442-806-1331 | 6.94 ppb |
2015-01-13 | 5442-801-1050 | ND |
2015-01-13 | 5442-802-1230 | 1.24 ppb |
2015-01-13 | 5442-803-0950 | 1.85 ppb |
2015-01-13 | 5442-804-0910 | 3.36 ppb |
2015-01-13 | 5442-805-0830 | 4.11 ppb |
2015-01-13 | 5442-807-0910 | 2.82 ppb |
2015-03-04 | 5442-011-1020 | ND |
2015-04-07 | 5442-093-0918 | ND |
2015-04-08 | 5442-800-1020 | 15.2 ppb |
2015-04-08 | 5442-801-1112 | 16.1 ppb |
2015-04-08 | 5442-802-1056 | 1.67 ppb |
2015-04-08 | 5442-803-1130 | 2.98 ppb |
2015-04-08 | 5442-804-1143 | 14.2 ppb |
2015-04-08 | 5442-805-1307 | 7.86 ppb |
2015-04-08 | 5442-806-1045 | 16.5 ppb |
2015-04-08 | 5442-807-1151 | 14.4 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 | 5.79 ppb |
2015-07-07 | 5442-803-1000 | 12.7 ppb |
2015-07-07 | 5442-804-0945 | 14.4 ppb |
2015-07-07 | 5442-805-1440 | 19.2 ppb |
2015-07-07 | 5442-807-1330 | 12.6 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 | 12.6 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 | 9.22 ppb |
2015-07-15 | 5442-801-0844 | 10.7 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 | 6.78 ppb |
2015-10-07 | 5442-802-1238 | 2.11 ppb |
2015-10-07 | 5442-803-0917 | 14.8 ppb |
2015-10-07 | 5442-804-0907 | 15.4 ppb |
2015-10-07 | 5442-805-0828 | 12.4 ppb |
2015-10-07 | 5442-806-1325 | 13.1 ppb |
2015-10-07 | 5442-807-0850 | 11.7 ppb |
2015-11-12 | 5442-801-1030 | 6.12 ppb |
2015-12-16 | 5442-094-1015 | ND |
2016-01-11 | 5442-800-1235 | 1.93 ppb |
2016-01-11 | 5442-806-1257 | 2.80 ppb |
2016-01-13 | 5442-801-1053 | 2.11 ppb |
2016-01-13 | 5442-802-1119 | 2.17 ppb |
2016-01-13 | 5442-803-1034 | 2.33 ppb |
2016-01-13 | 5442-804-0922 | 4.26 ppb |
2016-01-13 | 5442-805-0821 | 4.80 ppb |
2016-01-13 | 5442-807-0904 | 3.97 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 | 18.7 ppb |
2016-04-14 | 5442-801-1103 | 14.5 ppb |
2016-04-14 | 5442-802-1045 | 7.11 ppb |
2016-04-14 | 5442-803-1118 | 12.5 ppb |
2016-04-14 | 5442-804-1135 | 22.2 ppb |
2016-04-14 | 5442-805-1207 | 7.03 ppb |
2016-04-14 | 5442-806-1023 | 23.8 ppb |
2016-04-14 | 5442-807-1146 | 16.3 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 | 7.95 ppb |
2016-07-15 | 5442-801-0958 | 7.03 ppb |
2016-07-15 | 5442-802-1018 | 25.2 ppb |
2016-07-15 | 5442-803-0936 | 15.6 ppb |
2016-07-15 | 5442-804-0916 | 37.8 ppb |
2016-07-15 | 5442-805-0842 | 23.5 ppb |
2016-07-15 | 5442-806-1115 | 15.4 ppb |
2016-07-15 | 5442-807-0901 | 11.7 ppb |
2016-08-31 | 5442-016-1105 | ND |
2016-10-13 | 5442-802-1243 | 2.49 ppb |
2016-10-13 | 5442-804-1203 | 5.68 ppb |
2016-10-14 | 5442-800-1036 | 2.88 ppb |
2016-10-14 | 5442-801-0905 | 1.92 ppb |
2016-10-14 | 5442-802-0936 | 1.66 ppb |
2016-10-14 | 5442-806-1011 | 4.29 ppb |
2016-12-15 | 5442-045-0911 | ND |
2017-01-11 | 5442-802-1112 | 1.05 ppb |
2017-01-11 | 5442-803-1056 | 1.58 ppb |
2017-01-12 | 5442-804-1051 | 4.29 ppb |
2017-01-12 | 5442-805-1020 | 6.45 ppb |
2017-01-12 | 5442-806-1115 | 1.04 ppb |
2017-01-12 | 5442-807-1038 | 5.83 ppb |
2017-01-25 | 5442-800-1245 | 12.5 ppb |
2017-01-25 | 5442-801-1020 | 12.1 ppb |
2017-07-10 | 9588-800-0802 | 3.20 ppb |
2017-07-10 | 9588-801-0904 | 3.00 ppb |
2017-07-10 | 9588-802-0833 | 2.90 ppb |
2017-07-10 | 9588-803-0949 | 6.00 ppb |
2017-07-10 | 9588-804-1012 | 5.90 ppb |
2017-07-10 | 9588-805-1015 | 5.40 ppb |
2017-07-10 | 9588-806-1112 | 3.60 ppb |
2017-07-10 | 9588-807-0926 | 5.60 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 |