Bromodichloromethane
Santa Margarita Water District
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 | 12.4 ppb | 32 | 31 | ND - 30.4 ppb |
2015 | 11.6 ppb | 32 | 32 | 7.71 ppb - 14.8 ppb |
2016 | 7.19 ppb | 32 | 32 | 4.90 ppb - 9.00 ppb |
2017 | 7.48 ppb | 32 | 32 | 4.20 ppb - 11.0 ppb |
2018 | 6.66 ppb | 32 | 32 | 5.50 ppb - 8.80 ppb |
2019 | 6.36 ppb | 32 | 32 | 4.40 ppb - 10.00 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 | 1805-801-0700 | 29.0 ppb |
2014-01-07 | 1805-802-0700 | 28.5 ppb |
2014-01-07 | 1805-803-0700 | 24.5 ppb |
2014-01-07 | 1805-804-0700 | 13.0 ppb |
2014-01-07 | 1805-805-0700 | 9.14 ppb |
2014-01-07 | 1805-806-0700 | 14.9 ppb |
2014-01-07 | 1805-807-0700 | 30.4 ppb |
2014-01-07 | 1805-808-0700 | 29.5 ppb |
2014-04-03 | 1805-801-0730 | 8.78 ppb |
2014-04-03 | 1805-802-0730 | 7.27 ppb |
2014-04-03 | 1805-803-0730 | 10.3 ppb |
2014-04-03 | 1805-804-0730 | 7.94 ppb |
2014-04-03 | 1805-805-0730 | 9.25 ppb |
2014-04-03 | 1805-806-0730 | 9.88 ppb |
2014-04-03 | 1805-807-0730 | 7.02 ppb |
2014-04-03 | 1805-808-0730 | 8.76 ppb |
2014-07-01 | 1805-801-0000 | 17.2 ppb |
2014-07-01 | 1805-802-0000 | 13.6 ppb |
2014-07-01 | 1805-803-0000 | 15.5 ppb |
2014-07-01 | 1805-804-0000 | 14.9 ppb |
2014-07-01 | 1805-805-0000 | 12.6 ppb |
2014-07-01 | 1805-806-0000 | 12.7 ppb |
2014-07-01 | 1805-807-0000 | 15.5 ppb |
2014-07-01 | 1805-808-0000 | 17.2 ppb |
2014-10-07 | 1805-801-0000 | ND |
2014-10-07 | 1805-802-0000 | 5.87 ppb |
2014-10-07 | 1805-803-0000 | 4.77 ppb |
2014-10-07 | 1805-804-0000 | 3.63 ppb |
2014-10-07 | 1805-805-0000 | 3.72 ppb |
2014-10-07 | 1805-806-0000 | 4.44 ppb |
2014-10-07 | 1805-807-0000 | 4.34 ppb |
2014-10-07 | 1805-808-0000 | 4.08 ppb |
2015-01-06 | 1805-801-0000 | 13.3 ppb |
2015-01-06 | 1805-802-0000 | 13.6 ppb |
2015-01-06 | 1805-803-0000 | 12.4 ppb |
2015-01-06 | 1805-804-0000 | 10.2 ppb |
2015-01-06 | 1805-805-0000 | 12.2 ppb |
2015-01-06 | 1805-806-0000 | 7.71 ppb |
2015-01-06 | 1805-807-0000 | 9.31 ppb |
2015-01-06 | 1805-808-0000 | 10.8 ppb |
2015-04-06 | 1805-801-0949 | 10.8 ppb |
2015-04-06 | 1805-802-0958 | 9.68 ppb |
2015-04-06 | 1805-803-1014 | 11.3 ppb |
2015-04-06 | 1805-804-1051 | 10.1 ppb |
2015-04-06 | 1805-805-1333 | 10.1 ppb |
2015-04-06 | 1805-806-1507 | 9.79 ppb |
2015-04-06 | 1805-807-1422 | 9.86 ppb |
2015-04-06 | 1805-808-0849 | 10.9 ppb |
2015-07-07 | 1805-801-0000 | 14.1 ppb |
2015-07-07 | 1805-802-0000 | 13.3 ppb |
2015-07-07 | 1805-803-0000 | 13.0 ppb |
2015-07-07 | 1805-804-0000 | 13.4 ppb |
2015-07-08 | 1805-805-0000 | 11.3 ppb |
2015-07-08 | 1805-806-0000 | 10.9 ppb |
2015-07-08 | 1805-807-0000 | 10.8 ppb |
2015-07-09 | 1805-808-0000 | 14.8 ppb |
2015-10-05 | 1805-801-0842 | 8.83 ppb |
2015-10-05 | 1805-802-0858 | 11.5 ppb |
2015-10-05 | 1805-803-0915 | 14.0 ppb |
2015-10-05 | 1805-804-0957 | 13.0 ppb |
2015-10-05 | 1805-805-1331 | 12.7 ppb |
2015-10-05 | 1805-806-1545 | 12.8 ppb |
2015-10-05 | 1805-807-1529 | 13.7 ppb |
2015-10-07 | 1805-808-1103 | 11.7 ppb |
2016-01-05 | 1805-801-0850 | 7.50 ppb |
2016-01-05 | 1805-802-0904 | 7.12 ppb |
2016-01-05 | 1805-803-0918 | 6.18 ppb |
2016-01-05 | 1805-804-0953 | 7.28 ppb |
2016-01-05 | 1805-805-1239 | 6.76 ppb |
2016-01-05 | 1805-806-1551 | 7.02 ppb |
2016-01-05 | 1805-807-1449 | 5.98 ppb |
2016-01-06 | 1805-808-1204 | 6.28 ppb |
2016-04-13 | 9590-801-0938 | 5.70 ppb |
2016-04-13 | 9590-802-0955 | 5.40 ppb |
2016-04-13 | 9590-803-1014 | 4.90 ppb |
2016-04-13 | 9590-804-1520 | 5.60 ppb |
2016-04-13 | 9590-805-1430 | 5.30 ppb |
2016-04-13 | 9590-806-1622 | 6.30 ppb |
2016-04-13 | 9590-807-1528 | 8.00 ppb |
2016-04-14 | 9590-808-1054 | 5.50 ppb |
2016-07-07 | 9590-801-1330 | 8.20 ppb |
2016-07-07 | 9590-802-1350 | 8.00 ppb |
2016-07-07 | 9590-803-1410 | 7.50 ppb |
2016-07-07 | 9590-804-1425 | 8.40 ppb |
2016-07-07 | 9590-805-1500 | 8.10 ppb |
2016-07-07 | 9590-806-1530 | 8.00 ppb |
2016-07-07 | 9590-807-1515 | 8.80 ppb |
2016-07-07 | 9590-808-1255 | 7.70 ppb |
2016-10-06 | 9590-801-1203 | 8.20 ppb |
2016-10-06 | 9590-802-1332 | 8.10 ppb |
2016-10-06 | 9590-803-1352 | 7.60 ppb |
2016-10-06 | 9590-804-1048 | 8.00 ppb |
2016-10-06 | 9590-805-1113 | 7.80 ppb |
2016-10-06 | 9590-806-1416 | 7.60 ppb |
2016-10-06 | 9590-807-1135 | 8.10 ppb |
2016-10-06 | 9590-808-1000 | 9.00 ppb |
2017-01-06 | 9590-801-1002 | 8.40 ppb |
2017-01-06 | 9590-802-1023 | 8.50 ppb |
2017-01-06 | 9590-803-1050 | 7.80 ppb |
2017-01-06 | 9590-804-1118 | 8.40 ppb |
2017-01-06 | 9590-805-1140 | 11.0 ppb |
2017-01-06 | 9590-806-1227 | 8.20 ppb |
2017-01-06 | 9590-807-1252 | 9.20 ppb |
2017-01-06 | 9590-808-1157 | 8.60 ppb |
2017-04-06 | 9590-801-0850 | 7.20 ppb |
2017-04-06 | 9590-802-0915 | 9.00 ppb |
2017-04-06 | 9590-803-0935 | 7.50 ppb |
2017-04-06 | 9590-804-0958 | 5.70 ppb |
2017-04-06 | 9590-805-1030 | 8.90 ppb |
2017-04-06 | 9590-806-1109 | 9.70 ppb |
2017-04-06 | 9590-807-1050 | 9.00 ppb |
2017-04-06 | 9590-808-0937 | 10.00 ppb |
2017-07-06 | 9590-801-1032 | 5.70 ppb |
2017-07-06 | 9590-802-1050 | 5.00 ppb |
2017-07-06 | 9590-803-1107 | 4.20 ppb |
2017-07-06 | 9590-804-1208 | 4.20 ppb |
2017-07-06 | 9590-805-1300 | 4.70 ppb |
2017-07-06 | 9590-806-1338 | 5.10 ppb |
2017-07-06 | 9590-807-1242 | 5.00 ppb |
2017-07-06 | 9590-808-0820 | 5.20 ppb |
2017-10-05 | 9590-801-1042 | 7.40 ppb |
2017-10-05 | 9590-802-1055 | 8.30 ppb |
2017-10-05 | 9590-803-1108 | 6.80 ppb |
2017-10-05 | 9590-804-1126 | 6.90 ppb |
2017-10-05 | 9590-805-1225 | 8.60 ppb |
2017-10-05 | 9590-806-1259 | 8.40 ppb |
2017-10-05 | 9590-807-1245 | 8.20 ppb |
2017-10-05 | 9590-808-0857 | 8.70 ppb |
2018-01-04 | 9590-801-1330 | 6.70 ppb |
2018-01-04 | 9590-802-1311 | 8.40 ppb |
2018-01-04 | 9590-803-1251 | 7.90 ppb |
2018-01-04 | 9590-804-1225 | 6.10 ppb |
2018-01-04 | 9590-805-1157 | 7.30 ppb |
2018-01-04 | 9590-806-1111 | 7.90 ppb |
2018-01-04 | 9590-807-1128 | 7.80 ppb |
2018-01-04 | 9590-808-0828 | 8.80 ppb |
2018-04-05 | 9590-801-1009 | 6.50 ppb |
2018-04-05 | 9590-802-1021 | 6.00 ppb |
2018-04-05 | 9590-803-1039 | 5.80 ppb |
2018-04-05 | 9590-804-1058 | 5.70 ppb |
2018-04-05 | 9590-805-1329 | 6.30 ppb |
2018-04-05 | 9590-806-1253 | 7.30 ppb |
2018-04-05 | 9590-807-1310 | 6.30 ppb |
2018-04-05 | 9590-808-0828 | 6.30 ppb |
2018-07-03 | 9590-801-1252 | 5.80 ppb |
2018-07-03 | 9590-802-1239 | 5.90 ppb |
2018-07-03 | 9590-803-1225 | 5.80 ppb |
2018-07-03 | 9590-804-1156 | 5.80 ppb |
2018-07-03 | 9590-805-1116 | 6.60 ppb |
2018-07-03 | 9590-806-1023 | 7.20 ppb |
2018-07-03 | 9590-807-1047 | 5.50 ppb |
2018-07-03 | 9590-808-0950 | 5.50 ppb |
2018-10-04 | 9590-801-1004 | 6.30 ppb |
2018-10-04 | 9590-802-1015 | 7.00 ppb |
2018-10-04 | 9590-803-1028 | 6.80 ppb |
2018-10-04 | 9590-804-1046 | 6.20 ppb |
2018-10-04 | 9590-805-1106 | 6.70 ppb |
2018-10-04 | 9590-806-1153 | 6.90 ppb |
2018-10-04 | 9590-807-1131 | 7.10 ppb |
2018-10-04 | 9590-808-0928 | 6.90 ppb |
2019-01-10 | 9590-801-0956 | 6.30 ppb |
2019-01-10 | 9590-802-1017 | 5.80 ppb |
2019-01-10 | 9590-803-1040 | 5.90 ppb |
2019-01-10 | 9590-804-1101 | 6.40 ppb |
2019-01-10 | 9590-805-1259 | 5.40 ppb |
2019-01-10 | 9590-806-1343 | 5.80 ppb |
2019-01-10 | 9590-808-0828 | 5.80 ppb |
2019-01-15 | 9590-807-1350 | 5.70 ppb |
2019-04-04 | 9590-801-0823 | 6.40 ppb |
2019-04-04 | 9590-802-0837 | 7.10 ppb |
2019-04-04 | 9590-803-0900 | 7.20 ppb |
2019-04-04 | 9590-804-0930 | 7.40 ppb |
2019-04-04 | 9590-805-0956 | 6.70 ppb |
2019-04-04 | 9590-806-1110 | 6.70 ppb |
2019-04-04 | 9590-807-1041 | 6.30 ppb |
2019-04-04 | 9590-808-1241 | 6.60 ppb |
2019-07-25 | 9590-801-1043 | 10.00 ppb |
2019-07-25 | 9590-802-1059 | 4.70 ppb |
2019-07-25 | 9590-803-1125 | 4.80 ppb |
2019-07-25 | 9590-804-1147 | 4.50 ppb |
2019-07-25 | 9590-805-1300 | 7.20 ppb |
2019-07-25 | 9590-806-1357 | 9.20 ppb |
2019-07-25 | 9590-807-1326 | 9.20 ppb |
2019-07-25 | 9590-808-0932 | 8.80 ppb |
2019-10-08 | 9590-801-1103 | 6.20 ppb |
2019-10-08 | 9590-802-1120 | 6.20 ppb |
2019-10-08 | 9590-803-1159 | 4.40 ppb |
2019-10-08 | 9590-804-1220 | 4.40 ppb |
2019-10-08 | 9590-805-1314 | 5.10 ppb |
2019-10-08 | 9590-806-1441 | 5.30 ppb |
2019-10-08 | 9590-807-1403 | 5.80 ppb |
2019-10-08 | 9590-808-0851 | 6.30 ppb |