Bromodichloromethane
San Jose Water Company
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 | 7.17 ppb | 61 | 58 | ND - 16.0 ppb |
2015 | 10.9 ppb | 31 | 31 | 1.77 ppb - 20.4 ppb |
2016 | 6.32 ppb | 49 | 46 | ND - 11.4 ppb |
2017 | 6.03 ppb | 62 | 61 | ND - 14.0 ppb |
2018 | 9.20 ppb | 64 | 61 | ND - 20.9 ppb |
2019 | 7.21 ppb | 64 | 64 | 1.12 ppb - 19.7 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 |
---|---|---|
2014-02-28 | 1610-900-0957 | 12.7 ppb |
2014-02-28 | 1610-901-1241 | 9.10 ppb |
2014-02-28 | 1610-902-0900 | 12.9 ppb |
2014-02-28 | 1610-903-0926 | 12.3 ppb |
2014-02-28 | 1610-904-0910 | 16.0 ppb |
2014-02-28 | 1610-905-1212 | 9.10 ppb |
2014-02-28 | 1610-906-1021 | 14.8 ppb |
2014-02-28 | 1610-907-1225 | 7.79 ppb |
2014-02-28 | 1610-908-0941 | 5.99 ppb |
2014-02-28 | 1610-909-1009 | 9.02 ppb |
2014-02-28 | 1610-910-1032 | 5.08 ppb |
2014-02-28 | 1610-911-1054 | 6.16 ppb |
2014-02-28 | 1610-912-1414 | 7.67 ppb |
2014-02-28 | 1610-913-1351 | 7.99 ppb |
2014-02-28 | 1610-914-1320 | 9.42 ppb |
2014-02-28 | 1610-915-1110 | 0.730 ppb |
2014-05-07 | 1610-900-0925 | 0.720 ppb |
2014-05-07 | 1610-901-1007 | 10.5 ppb |
2014-05-07 | 1610-902-0753 | 11.0 ppb |
2014-05-07 | 1610-903-0913 | 2.64 ppb |
2014-05-07 | 1610-904-0807 | 11.2 ppb |
2014-05-07 | 1610-905-0933 | 12.7 ppb |
2014-05-07 | 1610-906-1035 | ND |
2014-05-07 | 1610-907-0943 | 10.7 ppb |
2014-05-07 | 1610-908-0900 | 5.07 ppb |
2014-05-07 | 1610-909-1025 | 4.17 ppb |
2014-05-07 | 1610-910-1055 | 14.9 ppb |
2014-05-07 | 1610-911-1116 | 4.00 ppb |
2014-05-07 | 1610-912-1323 | 1.76 ppb |
2014-05-07 | 1610-913-1430 | 11.5 ppb |
2014-05-07 | 1610-914-1420 | 10.2 ppb |
2014-05-07 | 1610-915-1235 | ND |
2014-08-25 | 1610-901-1138 | 12.2 ppb |
2014-08-25 | 1610-902-0933 | 7.60 ppb |
2014-08-25 | 1610-904-0947 | 7.14 ppb |
2014-08-25 | 1610-905-1108 | 12.0 ppb |
2014-08-25 | 1610-907-1123 | 11.5 ppb |
2014-08-25 | 1610-908-1025 | 4.23 ppb |
2014-08-25 | 1610-909-1155 | 12.8 ppb |
2014-08-25 | 1610-910-1217 | 10.00 ppb |
2014-08-25 | 1610-911-1333 | 5.92 ppb |
2014-08-25 | 1610-912-1417 | 6.43 ppb |
2014-08-25 | 1610-913-1449 | 5.39 ppb |
2014-08-25 | 1610-914-1438 | 6.18 ppb |
2014-08-25 | 1610-915-1350 | 2.29 ppb |
2014-11-07 | 1610-900-1015 | 3.71 ppb |
2014-11-07 | 1610-901-1055 | 3.64 ppb |
2014-11-07 | 1610-902-0909 | 6.70 ppb |
2014-11-07 | 1610-903-1004 | 3.40 ppb |
2014-11-07 | 1610-904-0920 | 5.80 ppb |
2014-11-07 | 1610-905-1024 | 4.74 ppb |
2014-11-07 | 1610-906-1222 | 3.23 ppb |
2014-11-07 | 1610-907-1040 | 3.85 ppb |
2014-11-07 | 1610-908-0948 | 2.32 ppb |
2014-11-07 | 1610-909-1103 | 2.90 ppb |
2014-11-07 | 1610-910-1243 | 8.00 ppb |
2014-11-07 | 1610-911-1303 | 7.31 ppb |
2014-11-07 | 1610-912-1353 | 7.49 ppb |
2014-11-07 | 1610-913-1427 | 5.70 ppb |
2014-11-07 | 1610-914-1411 | 7.11 ppb |
2014-11-07 | 1610-915-1334 | ND |
2015-02-06 | 1610-900-1014 | 10.5 ppb |
2015-02-06 | 1610-901-0958 | 9.08 ppb |
2015-02-06 | 1610-902-1306 | 2.38 ppb |
2015-02-06 | 1610-903-1228 | 11.5 ppb |
2015-02-06 | 1610-904-1259 | 1.77 ppb |
2015-02-06 | 1610-905-0923 | 13.1 ppb |
2015-02-06 | 1610-906-0858 | 10.6 ppb |
2015-02-06 | 1610-907-0948 | 10.6 ppb |
2015-02-06 | 1610-908-1024 | 5.96 ppb |
2015-02-06 | 1610-909-0913 | 11.2 ppb |
2015-02-06 | 1610-910-1041 | 6.74 ppb |
2015-02-06 | 1610-911-1154 | 6.63 ppb |
2015-02-06 | 1610-912-1339 | 8.09 ppb |
2015-02-06 | 1610-913-1418 | 9.50 ppb |
2015-02-06 | 1610-914-1400 | 10.1 ppb |
2015-02-06 | 1610-915-1051 | 1.85 ppb |
2015-05-29 | 1610-900-1115 | 18.1 ppb |
2015-05-29 | 1610-901-1339 | 9.98 ppb |
2015-05-29 | 1610-902-1000 | 20.4 ppb |
2015-05-29 | 1610-903-1105 | 14.9 ppb |
2015-05-29 | 1610-904-1016 | 20.4 ppb |
2015-05-29 | 1610-905-1310 | 14.1 ppb |
2015-05-29 | 1610-906-1240 | 12.5 ppb |
2015-05-29 | 1610-907-1322 | 11.5 ppb |
2015-05-29 | 1610-908-1050 | 19.3 ppb |
2015-05-29 | 1610-909-1250 | 11.2 ppb |
2015-05-29 | 1610-910-1227 | 11.3 ppb |
2015-05-29 | 1610-911-1403 | 8.84 ppb |
2015-05-29 | 1610-912-1435 | 12.5 ppb |
2015-05-29 | 1610-914-1453 | 13.4 ppb |
2015-05-29 | 1610-915-1216 | 10.5 ppb |
2016-03-04 | 1610-005-1315 | ND |
2016-04-01 | 1610-005-1140 | ND |
2016-05-06 | 1610-900-0907 | 5.61 ppb |
2016-05-06 | 1610-901-1027 | 4.55 ppb |
2016-05-06 | 1610-902-0800 | 5.90 ppb |
2016-05-06 | 1610-903-0852 | 7.81 ppb |
2016-05-06 | 1610-904-0812 | 7.24 ppb |
2016-05-06 | 1610-905-0945 | 7.58 ppb |
2016-05-06 | 1610-906-1045 | 5.24 ppb |
2016-05-06 | 1610-907-1000 | 6.74 ppb |
2016-05-06 | 1610-908-0835 | 11.4 ppb |
2016-05-06 | 1610-909-0925 | 6.30 ppb |
2016-05-06 | 1610-910-1110 | 8.34 ppb |
2016-05-06 | 1610-911-1145 | 6.91 ppb |
2016-05-06 | 1610-912-1320 | 8.18 ppb |
2016-05-06 | 1610-913-1415 | 10.6 ppb |
2016-05-06 | 1610-914-1350 | 10.7 ppb |
2016-05-06 | 1610-915-1255 | 6.93 ppb |
2016-08-19 | 1610-900-1151 | 6.31 ppb |
2016-08-19 | 1610-902-1026 | 8.72 ppb |
2016-08-19 | 1610-903-1142 | 6.48 ppb |
2016-08-19 | 1610-904-1110 | 7.69 ppb |
2016-08-19 | 1610-905-1313 | 6.02 ppb |
2016-08-19 | 1610-906-1350 | 5.49 ppb |
2016-08-19 | 1610-907-1330 | 5.20 ppb |
2016-08-19 | 1610-908-1130 | 8.80 ppb |
2016-08-19 | 1610-909-1343 | 3.52 ppb |
2016-08-19 | 1610-910-1410 | 9.37 ppb |
2016-08-19 | 1610-911-0829 | 6.07 ppb |
2016-08-19 | 1610-912-0915 | 6.73 ppb |
2016-08-19 | 1610-913-0946 | 6.97 ppb |
2016-08-19 | 1610-914-0938 | 7.49 ppb |
2016-08-19 | 1610-915-0855 | ND |
2016-11-01 | 1610-900-1041 | 4.97 ppb |
2016-11-01 | 1610-901-1145 | 5.17 ppb |
2016-11-01 | 1610-902-0943 | 8.25 ppb |
2016-11-01 | 1610-903-1032 | 4.90 ppb |
2016-11-01 | 1610-904-0954 | 7.38 ppb |
2016-11-01 | 1610-905-1117 | 5.45 ppb |
2016-11-01 | 1610-906-1050 | 4.79 ppb |
2016-11-01 | 1610-907-1130 | 4.11 ppb |
2016-11-01 | 1610-908-1013 | 7.34 ppb |
2016-11-01 | 1610-909-1103 | 6.03 ppb |
2016-11-01 | 1610-910-1231 | 8.21 ppb |
2016-11-01 | 1610-911-1207 | 5.15 ppb |
2016-11-01 | 1610-912-1432 | 5.59 ppb |
2016-11-01 | 1610-913-1357 | 5.51 ppb |
2016-11-01 | 1610-914-1412 | 6.17 ppb |
2016-11-01 | 1610-915-1245 | 5.74 ppb |
2017-02-10 | 1610-900-0836 | 6.01 ppb |
2017-02-10 | 1610-901-0915 | 3.83 ppb |
2017-02-10 | 1610-902-0743 | 10.2 ppb |
2017-02-10 | 1610-903-0826 | 4.60 ppb |
2017-02-10 | 1610-904-0750 | 9.81 ppb |
2017-02-10 | 1610-905-0850 | 2.54 ppb |
2017-02-10 | 1610-906-0943 | 5.32 ppb |
2017-02-10 | 1610-907-0902 | 2.40 ppb |
2017-02-10 | 1610-908-0811 | 14.0 ppb |
2017-02-10 | 1610-909-0933 | 3.20 ppb |
2017-02-10 | 1610-910-1000 | 12.9 ppb |
2017-02-10 | 1610-911-1046 | 4.44 ppb |
2017-02-10 | 1610-912-1230 | 4.56 ppb |
2017-02-10 | 1610-913-1300 | 3.84 ppb |
2017-02-10 | 1610-914-1300 | 4.58 ppb |
2017-02-10 | 1610-915-1011 | 0.770 ppb |
2017-05-15 | 1610-900-1016 | 5.20 ppb |
2017-05-15 | 1610-901-1345 | 2.36 ppb |
2017-05-15 | 1610-902-0903 | 5.77 ppb |
2017-05-15 | 1610-903-1007 | 5.27 ppb |
2017-05-15 | 1610-904-0915 | 3.91 ppb |
2017-05-15 | 1610-905-1317 | 2.41 ppb |
2017-05-15 | 1610-906-1032 | 5.54 ppb |
2017-05-15 | 1610-907-1329 | 2.89 ppb |
2017-05-15 | 1610-908-0938 | 5.90 ppb |
2017-05-15 | 1610-909-1023 | 2.89 ppb |
2017-05-15 | 1610-910-1115 | 4.83 ppb |
2017-05-15 | 1610-911-1252 | 6.51 ppb |
2017-05-15 | 1610-912-1414 | 7.66 ppb |
2017-05-15 | 1610-913-1445 | 6.84 ppb |
2017-05-15 | 1610-914-1435 | 7.53 ppb |
2017-05-15 | 1610-915-1028 | 5.03 ppb |
2017-08-14 | 1610-900-1011 | 7.87 ppb |
2017-08-14 | 1610-902-0919 | 9.90 ppb |
2017-08-14 | 1610-903-1000 | 7.52 ppb |
2017-08-14 | 1610-904-0930 | 9.65 ppb |
2017-08-14 | 1610-905-1050 | 2.29 ppb |
2017-08-14 | 1610-906-1023 | 7.04 ppb |
2017-08-14 | 1610-907-1111 | 2.47 ppb |
2017-08-14 | 1610-908-0948 | 8.25 ppb |
2017-08-14 | 1610-909-1300 | 1.40 ppb |
2017-08-14 | 1610-911-1235 | 7.22 ppb |
2017-08-14 | 1610-912-1318 | 7.29 ppb |
2017-08-14 | 1610-913-1407 | 5.85 ppb |
2017-08-14 | 1610-914-1343 | 6.88 ppb |
2017-08-14 | 1610-915-1255 | 0.570 ppb |
2017-11-01 | 1610-900-1009 | 10.0 ppb |
2017-11-01 | 1610-901-1125 | 2.98 ppb |
2017-11-01 | 1610-902-0915 | 12.2 ppb |
2017-11-01 | 1610-903-1002 | 9.67 ppb |
2017-11-01 | 1610-904-0900 | 11.5 ppb |
2017-11-01 | 1610-905-1043 | 3.21 ppb |
2017-11-01 | 1610-906-1032 | 10.3 ppb |
2017-11-01 | 1610-907-1051 | 4.25 ppb |
2017-11-01 | 1610-908-0950 | 8.75 ppb |
2017-11-01 | 1610-909-1023 | 3.09 ppb |
2017-11-01 | 1610-910-1201 | 11.4 ppb |
2017-11-01 | 1610-911-1255 | 8.56 ppb |
2017-11-01 | 1610-912-1337 | 7.65 ppb |
2017-11-01 | 1610-913-1410 | 6.46 ppb |
2017-11-01 | 1610-914-1400 | 5.84 ppb |
2017-11-01 | 1610-915-1317 | ND |
2018-02-12 | 1610-900-1058 | 7.84 ppb |
2018-02-12 | 1610-901-1243 | 5.26 ppb |
2018-02-12 | 1610-902-0931 | 14.2 ppb |
2018-02-12 | 1610-903-1050 | 8.75 ppb |
2018-02-12 | 1610-904-0940 | 15.9 ppb |
2018-02-12 | 1610-905-1213 | 6.44 ppb |
2018-02-12 | 1610-906-1119 | 13.7 ppb |
2018-02-12 | 1610-907-1227 | 4.82 ppb |
2018-02-12 | 1610-908-1011 | 12.6 ppb |
2018-02-12 | 1610-909-1146 | 7.36 ppb |
2018-02-12 | 1610-910-1302 | 1.54 ppb |
2018-02-12 | 1610-911-1337 | 4.60 ppb |
2018-02-12 | 1610-912-1416 | 11.8 ppb |
2018-02-12 | 1610-913-1449 | 11.0 ppb |
2018-02-12 | 1610-914-1441 | 8.48 ppb |
2018-02-12 | 1610-915-1315 | ND |
2018-05-07 | 1610-900-1022 | 5.06 ppb |
2018-05-07 | 1610-901-1150 | 5.06 ppb |
2018-05-07 | 1610-902-0918 | 15.4 ppb |
2018-05-07 | 1610-903-1014 | 6.82 ppb |
2018-05-07 | 1610-904-0929 | 14.3 ppb |
2018-05-07 | 1610-905-1121 | 4.73 ppb |
2018-05-07 | 1610-906-1045 | 6.30 ppb |
2018-05-07 | 1610-907-1130 | 2.43 ppb |
2018-05-07 | 1610-908-0955 | 14.9 ppb |
2018-05-07 | 1610-909-1036 | 6.77 ppb |
2018-05-07 | 1610-910-1207 | 11.8 ppb |
2018-05-07 | 1610-911-1314 | 7.56 ppb |
2018-05-07 | 1610-913-1348 | 8.08 ppb |
2018-05-07 | 1610-914-1405 | 10.8 ppb |
2018-05-07 | 1610-915-1217 | ND |
2018-05-08 | 1610-912-1254 | 8.97 ppb |
2018-08-02 | 1610-900-1004 | 7.87 ppb |
2018-08-02 | 1610-901-1105 | 9.08 ppb |
2018-08-02 | 1610-902-0910 | 16.6 ppb |
2018-08-02 | 1610-903-0954 | 8.67 ppb |
2018-08-02 | 1610-904-0920 | 16.3 ppb |
2018-08-02 | 1610-905-1046 | 9.02 ppb |
2018-08-02 | 1610-906-1038 | 9.91 ppb |
2018-08-02 | 1610-907-1055 | 5.62 ppb |
2018-08-02 | 1610-908-0941 | 13.6 ppb |
2018-08-02 | 1610-909-1021 | 9.12 ppb |
2018-08-02 | 1610-910-1139 | 14.7 ppb |
2018-08-02 | 1610-911-1300 | 9.90 ppb |
2018-08-02 | 1610-912-1331 | 10.3 ppb |
2018-08-02 | 1610-913-1410 | 11.9 ppb |
2018-08-02 | 1610-914-1400 | 11.1 ppb |
2018-08-02 | 1610-915-1236 | ND |
2018-11-05 | 1610-900-1055 | 6.86 ppb |
2018-11-05 | 1610-901-1230 | 6.77 ppb |
2018-11-05 | 1610-902-0935 | 17.9 ppb |
2018-11-05 | 1610-903-1045 | 8.29 ppb |
2018-11-05 | 1610-904-0947 | 20.9 ppb |
2018-11-05 | 1610-905-1156 | 7.35 ppb |
2018-11-05 | 1610-906-1119 | 7.94 ppb |
2018-11-05 | 1610-907-1204 | 3.66 ppb |
2018-11-05 | 1610-908-1011 | 17.3 ppb |
2018-11-05 | 1610-909-1109 | 7.85 ppb |
2018-11-05 | 1610-910-1358 | 16.9 ppb |
2018-11-05 | 1610-911-1418 | 5.54 ppb |
2018-11-05 | 1610-915-1342 | 1.95 ppb |
2018-11-06 | 1610-912-1138 | 7.29 ppb |
2018-11-06 | 1610-913-1430 | 13.4 ppb |
2018-11-06 | 1610-914-1415 | 12.2 ppb |
2019-02-11 | 1610-900-1107 | 2.26 ppb |
2019-02-11 | 1610-901-1219 | 2.19 ppb |
2019-02-11 | 1610-902-0842 | 17.1 ppb |
2019-02-11 | 1610-903-1055 | 2.51 ppb |
2019-02-11 | 1610-904-0902 | 16.7 ppb |
2019-02-11 | 1610-905-1139 | 2.33 ppb |
2019-02-11 | 1610-906-1339 | 3.36 ppb |
2019-02-11 | 1610-907-1200 | 1.44 ppb |
2019-02-11 | 1610-908-1007 | 9.91 ppb |
2019-02-11 | 1610-909-1237 | 2.61 ppb |
2019-02-11 | 1610-910-1401 | 1.16 ppb |
2019-02-11 | 1610-915-1424 | 3.52 ppb |
2019-02-12 | 1610-911-0955 | 9.33 ppb |
2019-02-12 | 1610-912-1119 | 14.6 ppb |
2019-02-12 | 1610-913-1335 | 14.1 ppb |
2019-02-12 | 1610-914-1320 | 12.0 ppb |
2019-05-08 | 1610-900-1030 | 3.82 ppb |
2019-05-08 | 1610-901-1145 | 3.51 ppb |
2019-05-08 | 1610-902-0915 | 13.1 ppb |
2019-05-08 | 1610-903-1020 | 7.50 ppb |
2019-05-08 | 1610-904-0931 | 12.2 ppb |
2019-05-08 | 1610-905-1120 | 3.93 ppb |
2019-05-08 | 1610-906-1100 | 3.77 ppb |
2019-05-08 | 1610-907-1135 | 2.02 ppb |
2019-05-08 | 1610-908-0951 | 15.4 ppb |
2019-05-08 | 1610-909-1045 | 3.72 ppb |
2019-05-08 | 1610-910-1235 | 5.95 ppb |
2019-05-08 | 1610-911-1215 | 5.06 ppb |
2019-05-08 | 1610-912-1310 | 6.95 ppb |
2019-05-08 | 1610-913-1415 | 6.15 ppb |
2019-05-08 | 1610-914-1345 | 6.32 ppb |
2019-05-08 | 1610-915-1247 | 2.30 ppb |
2019-08-14 | 1610-900-0709 | 5.04 ppb |
2019-08-14 | 1610-901-0812 | 4.91 ppb |
2019-08-14 | 1610-902-0600 | 13.5 ppb |
2019-08-14 | 1610-903-0700 | 4.88 ppb |
2019-08-14 | 1610-904-1046 | 13.7 ppb |
2019-08-14 | 1610-905-0752 | 4.60 ppb |
2019-08-14 | 1610-906-0743 | 5.06 ppb |
2019-08-14 | 1610-907-0800 | 3.02 ppb |
2019-08-14 | 1610-908-0639 | 12.1 ppb |
2019-08-14 | 1610-909-0724 | 5.06 ppb |
2019-08-14 | 1610-910-0836 | 7.31 ppb |
2019-08-14 | 1610-911-0907 | 5.74 ppb |
2019-08-14 | 1610-912-1028 | 7.92 ppb |
2019-08-14 | 1610-913-1123 | 6.99 ppb |
2019-08-14 | 1610-914-1100 | 6.67 ppb |
2019-08-14 | 1610-915-0848 | 2.36 ppb |
2019-11-20 | 1610-900-1130 | 9.43 ppb |
2019-11-20 | 1610-901-1028 | 7.82 ppb |
2019-11-20 | 1610-902-1011 | 19.7 ppb |
2019-11-20 | 1610-903-1120 | 8.77 ppb |
2019-11-20 | 1610-904-0922 | 15.7 ppb |
2019-11-20 | 1610-905-0953 | 7.84 ppb |
2019-11-20 | 1610-906-1059 | 8.63 ppb |
2019-11-20 | 1610-907-1008 | 5.21 ppb |
2019-11-20 | 1610-908-0929 | 2.53 ppb |
2019-11-20 | 1610-909-1047 | 6.77 ppb |
2019-11-20 | 1610-910-1121 | 10.4 ppb |
2019-11-20 | 1610-911-1150 | 5.33 ppb |
2019-11-20 | 1610-912-1408 | 5.27 ppb |
2019-11-20 | 1610-913-1420 | 13.4 ppb |
2019-11-20 | 1610-914-1400 | 7.75 ppb |
2019-11-20 | 1610-915-1311 | 1.12 ppb |