Bromodichloromethane
Paramount Water Department
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 | 0.871 ppb | 43 | 21 | ND - 7.61 ppb |
2015 | 1.63 ppb | 37 | 30 | ND - 3.48 ppb |
2016 | 3.43 ppb | 37 | 32 | ND - 10.1 ppb |
2017 | 1.15 ppb | 45 | 38 | ND - 3.06 ppb |
2018 | 1.62 ppb | 37 | 34 | ND - 3.20 ppb |
2019 | 0.849 ppb | 31 | 14 | ND - 3.11 ppb |
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 |
---|---|---|
2014-01-07 | 9469-800-0756 | ND |
2014-01-07 | 9469-801-0810 | ND |
2014-01-07 | 9469-802-1025 | ND |
2014-01-07 | 9469-803-0822 | 1.14 ppb |
2014-01-07 | 9469-804-0840 | 4.00 ppb |
2014-01-07 | 9469-805-0855 | 7.61 ppb |
2014-01-07 | 9469-806-1008 | 6.99 ppb |
2014-01-07 | 9469-807-1034 | ND |
2014-02-27 | 9588-025-0954 | ND |
2014-02-27 | 9588-027-1001 | 1.70 ppb |
2014-04-01 | 9469-800-0814 | 1.04 ppb |
2014-04-01 | 9469-801-0821 | ND |
2014-04-01 | 9469-802-1045 | ND |
2014-04-01 | 9469-803-0832 | 0.753 ppb |
2014-04-01 | 9469-804-0850 | 1.38 ppb |
2014-04-01 | 9469-805-1005 | 1.03 ppb |
2014-04-01 | 9469-806-1015 | 0.887 ppb |
2014-04-01 | 9469-807-1035 | ND |
2014-04-28 | 9588-015-1100 | ND |
2014-04-28 | 9588-016-1127 | ND |
2014-04-28 | 9588-024-1106 | 1.20 ppb |
2014-04-28 | 9588-025-1032 | ND |
2014-04-28 | 9588-027-1034 | ND |
2014-07-01 | 9469-800-0746 | ND |
2014-07-01 | 9469-801-0757 | ND |
2014-07-01 | 9469-802-0813 | ND |
2014-07-01 | 9469-803-0824 | 0.680 ppb |
2014-07-01 | 9469-804-0851 | 1.51 ppb |
2014-07-01 | 9469-805-0834 | 1.06 ppb |
2014-07-01 | 9469-806-0841 | 1.02 ppb |
2014-07-01 | 9469-807-0805 | ND |
2014-07-29 | 9588-025-1020 | ND |
2014-07-29 | 9588-027-1035 | ND |
2014-10-07 | 9469-800-1000 | 0.563 ppb |
2014-10-07 | 9469-801-1032 | 0.515 ppb |
2014-10-07 | 9469-802-1040 | ND |
2014-10-07 | 9469-803-1051 | 1.27 ppb |
2014-10-07 | 9469-804-1235 | 0.693 ppb |
2014-10-07 | 9469-805-1245 | 1.40 ppb |
2014-10-07 | 9469-806-1010 | 1.02 ppb |
2014-10-07 | 9469-807-1045 | ND |
2014-10-29 | 9588-025-1027 | ND |
2014-10-29 | 9588-027-1020 | ND |
2015-01-06 | 9469-800-0952 | 1.38 ppb |
2015-01-06 | 9469-801-1008 | ND |
2015-01-06 | 9469-802-1020 | 1.19 ppb |
2015-01-06 | 9469-803-1043 | 2.02 ppb |
2015-01-06 | 9469-804-1116 | 1.93 ppb |
2015-01-06 | 9469-805-1101 | 2.12 ppb |
2015-01-06 | 9469-806-1050 | 2.45 ppb |
2015-01-06 | 9469-807-1031 | ND |
2015-01-29 | 9588-025-1527 | ND |
2015-01-29 | 9588-027-1531 | ND |
2015-04-21 | 9469-800-0740 | 1.56 ppb |
2015-04-21 | 9469-801-0750 | ND |
2015-04-21 | 9469-802-0758 | 1.13 ppb |
2015-04-21 | 9469-803-0809 | 1.72 ppb |
2015-04-21 | 9469-804-0858 | 2.16 ppb |
2015-04-21 | 9469-805-0844 | 1.81 ppb |
2015-04-21 | 9469-806-0835 | 1.85 ppb |
2015-04-21 | 9469-807-0822 | 1.22 ppb |
2015-04-27 | 9588-015-1003 | ND |
2015-04-27 | 9588-016-0945 | ND |
2015-04-27 | 9588-024-1006 | 1.30 ppb |
2015-07-28 | 9469-800-0750 | 2.52 ppb |
2015-07-28 | 9469-801-0756 | 2.46 ppb |
2015-07-28 | 9469-802-0815 | 2.30 ppb |
2015-07-28 | 9469-803-0828 | 3.04 ppb |
2015-07-28 | 9469-804-0856 | 3.24 ppb |
2015-07-28 | 9469-805-1020 | 3.46 ppb |
2015-07-28 | 9469-806-1032 | 3.48 ppb |
2015-07-28 | 9469-807-0841 | 2.07 ppb |
2015-10-20 | 9469-800-1033 | 1.80 ppb |
2015-10-20 | 9469-801-1041 | 1.33 ppb |
2015-10-20 | 9469-802-1015 | 1.89 ppb |
2015-10-20 | 9469-803-1006 | 1.83 ppb |
2015-10-20 | 9469-804-0936 | 1.99 ppb |
2015-10-20 | 9469-805-0948 | 1.99 ppb |
2015-10-20 | 9469-806-0954 | 1.82 ppb |
2015-10-20 | 9469-807-1022 | 1.12 ppb |
2016-01-11 | 9469-800-1005 | 9.89 ppb |
2016-01-11 | 9469-801-1054 | 10.1 ppb |
2016-01-11 | 9469-802-1101 | 9.75 ppb |
2016-01-11 | 9469-803-1121 | 9.90 ppb |
2016-01-11 | 9469-804-1150 | 10.00 ppb |
2016-01-11 | 9469-805-1134 | 9.83 ppb |
2016-01-11 | 9469-806-1141 | 9.89 ppb |
2016-01-11 | 9469-807-1110 | 9.98 ppb |
2016-01-29 | 9588-025-0948 | ND |
2016-01-29 | 9588-027-0954 | ND |
2016-04-29 | 9588-015-0956 | ND |
2016-04-29 | 9588-016-0923 | ND |
2016-04-29 | 9588-024-0959 | ND |
2016-05-18 | 9469-800-1119 | 1.90 ppb |
2016-05-18 | 9469-801-1126 | 1.27 ppb |
2016-05-18 | 9469-802-0900 | 1.40 ppb |
2016-05-18 | 9469-803-1135 | 2.47 ppb |
2016-05-18 | 9469-804-1049 | 2.73 ppb |
2016-05-18 | 9469-805-1100 | 2.46 ppb |
2016-05-18 | 9469-806-1109 | 2.84 ppb |
2016-05-18 | 9469-807-0850 | 1.34 ppb |
2016-07-18 | 9469-800-1324 | 1.46 ppb |
2016-07-18 | 9469-801-1318 | 1.06 ppb |
2016-07-18 | 9469-802-1303 | 1.30 ppb |
2016-07-18 | 9469-803-1255 | 2.13 ppb |
2016-07-18 | 9469-804-1246 | 2.64 ppb |
2016-07-18 | 9469-805-1230 | 2.86 ppb |
2016-07-18 | 9469-806-1236 | 2.53 ppb |
2016-07-18 | 9469-807-1310 | 0.983 ppb |
2016-10-11 | 9469-800-0918 | 1.72 ppb |
2016-10-11 | 9469-801-0722 | 1.39 ppb |
2016-10-11 | 9469-802-0739 | 1.64 ppb |
2016-10-11 | 9469-803-1028 | 2.35 ppb |
2016-10-11 | 9469-804-0907 | 2.81 ppb |
2016-10-11 | 9469-805-0857 | 2.63 ppb |
2016-10-11 | 9469-806-0847 | 2.40 ppb |
2016-10-11 | 9469-807-0818 | 1.28 ppb |
2017-01-23 | 9588-025-1045 | ND |
2017-01-23 | 9588-027-1047 | ND |
2017-03-20 | 9469-800-1110 | 1.08 ppb |
2017-03-20 | 9469-801-1118 | 0.949 ppb |
2017-03-20 | 9469-802-1133 | 1.02 ppb |
2017-03-20 | 9469-803-1253 | 1.19 ppb |
2017-03-20 | 9469-804-1329 | 1.45 ppb |
2017-03-20 | 9469-805-1306 | 1.28 ppb |
2017-03-20 | 9469-806-1318 | 0.819 ppb |
2017-03-20 | 9469-807-1127 | 1.19 ppb |
2017-04-03 | 9588-015-1124 | ND |
2017-04-03 | 9588-016-1020 | ND |
2017-04-03 | 9588-024-1112 | ND |
2017-04-17 | 9469-800-1020 | 1.50 ppb |
2017-04-17 | 9469-801-1026 | 1.05 ppb |
2017-04-17 | 9469-802-1034 | 1.36 ppb |
2017-04-17 | 9469-803-0847 | 1.92 ppb |
2017-04-17 | 9469-804-1055 | 3.06 ppb |
2017-04-17 | 9469-805-0900 | 2.07 ppb |
2017-04-17 | 9469-806-1046 | 1.94 ppb |
2017-04-17 | 9469-807-0746 | 0.939 ppb |
2017-07-11 | 9469-800-1020 | 1.10 ppb |
2017-07-11 | 9469-801-1027 | 0.834 ppb |
2017-07-11 | 9469-802-1036 | 0.971 ppb |
2017-07-11 | 9469-803-1058 | 1.19 ppb |
2017-07-11 | 9469-804-1136 | 1.39 ppb |
2017-07-11 | 9469-805-1125 | 1.26 ppb |
2017-07-11 | 9469-806-1114 | 1.17 ppb |
2017-07-11 | 9469-807-1046 | 0.916 ppb |
2017-10-03 | 9469-800-0920 | 2.09 ppb |
2017-10-03 | 9469-801-0727 | ND |
2017-10-03 | 9469-802-0929 | 1.06 ppb |
2017-10-03 | 9469-803-0938 | 1.09 ppb |
2017-10-03 | 9469-804-1015 | 2.43 ppb |
2017-10-03 | 9469-805-1000 | 1.22 ppb |
2017-10-03 | 9469-806-0950 | 1.15 ppb |
2017-10-03 | 9469-807-0810 | ND |
2017-10-17 | 9469-800-1017 | 1.78 ppb |
2017-10-17 | 9469-801-1029 | 1.14 ppb |
2017-10-17 | 9469-802-1035 | 1.51 ppb |
2017-10-17 | 9469-803-1106 | 1.40 ppb |
2017-10-17 | 9469-804-1123 | 1.16 ppb |
2017-10-17 | 9469-805-1130 | 1.58 ppb |
2017-10-17 | 9469-806-1114 | 1.47 ppb |
2017-10-17 | 9469-807-1054 | 1.13 ppb |
2018-01-08 | 9588-025-1130 | ND |
2018-01-08 | 9588-027-1136 | 1.10 ppb |
2018-01-16 | 9469-800-0650 | 1.05 ppb |
2018-01-16 | 9469-801-0655 | 1.06 ppb |
2018-01-16 | 9469-802-0707 | 1.14 ppb |
2018-01-16 | 9469-803-0735 | 1.49 ppb |
2018-01-16 | 9469-804-0914 | 1.66 ppb |
2018-01-16 | 9469-805-1044 | 1.63 ppb |
2018-01-16 | 9469-806-1031 | 1.58 ppb |
2018-01-16 | 9469-807-1019 | 1.41 ppb |
2018-04-09 | 9588-015-1041 | ND |
2018-04-09 | 9588-024-1046 | 1.30 ppb |
2018-04-16 | 9588-016-0940 | ND |
2018-04-23 | 9469-800-1150 | 2.01 ppb |
2018-04-23 | 9469-801-1205 | 2.00 ppb |
2018-04-23 | 9469-802-1211 | 1.92 ppb |
2018-04-23 | 9469-803-1229 | 2.06 ppb |
2018-04-23 | 9469-804-1300 | 2.06 ppb |
2018-04-23 | 9469-805-1249 | 2.13 ppb |
2018-04-23 | 9469-806-1240 | 2.14 ppb |
2018-04-23 | 9469-807-1218 | 1.82 ppb |
2018-07-17 | 9469-800-0720 | 1.77 ppb |
2018-07-17 | 9469-801-1208 | 1.000 ppb |
2018-07-17 | 9469-802-0836 | 1.48 ppb |
2018-07-17 | 9469-803-0742 | 2.26 ppb |
2018-07-17 | 9469-804-0913 | 2.88 ppb |
2018-07-17 | 9469-805-0902 | 2.58 ppb |
2018-07-17 | 9469-806-0853 | 1.24 ppb |
2018-07-17 | 9469-807-0822 | 1.34 ppb |
2018-10-16 | 9469-800-0732 | 1.47 ppb |
2018-10-16 | 9469-801-1145 | 1.47 ppb |
2018-10-16 | 9469-802-0804 | 1.25 ppb |
2018-10-16 | 9469-803-0749 | 1.69 ppb |
2018-10-16 | 9469-804-0935 | 3.20 ppb |
2018-10-16 | 9469-805-0924 | 2.51 ppb |
2018-10-16 | 9469-806-0912 | 2.70 ppb |
2018-10-16 | 9469-807-0852 | 1.60 ppb |
2019-01-07 | 9588-025-1028 | ND |
2019-01-15 | 9469-800-0705 | 1.36 ppb |
2019-01-15 | 9469-801-0714 | ND |
2019-01-15 | 9469-802-0721 | ND |
2019-01-15 | 9469-803-0734 | 1.60 ppb |
2019-01-15 | 9469-804-1010 | 2.17 ppb |
2019-01-15 | 9469-805-0955 | 2.94 ppb |
2019-01-15 | 9469-806-0948 | 1.94 ppb |
2019-01-15 | 9469-807-0935 | 1.10 ppb |
2019-03-20 | 9588-025-1025 | ND |
2019-03-20 | 9588-027-1030 | ND |
2019-04-03 | 9588-015-1035 | ND |
2019-04-03 | 9588-016-1010 | ND |
2019-04-03 | 9588-024-1040 | ND |
2019-04-23 | 9469-800-0723 | 1.03 ppb |
2019-04-23 | 9469-801-1027 | ND |
2019-04-23 | 9469-802-1016 | ND |
2019-04-23 | 9469-803-0836 | 1.62 ppb |
2019-04-23 | 9469-804-0900 | 3.11 ppb |
2019-04-23 | 9469-805-0851 | 2.78 ppb |
2019-04-23 | 9469-806-0844 | 2.88 ppb |
2019-04-23 | 9469-807-0817 | 1.50 ppb |
2019-10-15 | 2706-800-0744 | ND |
2019-10-15 | 2706-801-0751 | ND |
2019-10-15 | 2706-802-0802 | ND |
2019-10-15 | 2706-803-0817 | ND |
2019-10-15 | 2706-804-0850 | ND |
2019-10-15 | 2706-805-0841 | 1.20 ppb |
2019-10-15 | 2706-806-0831 | 1.10 ppb |
2019-10-15 | 2706-807-0001 | ND |
2019-10-15 | 2706-807-0807 | ND |