Dibromochloromethane
San Jose Water Company
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 | 13.4 ppb | 61 | 61 | 0.550 ppb - 43.6 ppb |
2015 | 10.5 ppb | 31 | 31 | 1.52 ppb - 37.4 ppb |
2016 | 7.76 ppb | 49 | 46 | ND - 13.2 ppb |
2017 | 6.87 ppb | 62 | 60 | ND - 28.7 ppb |
2018 | 9.02 ppb | 64 | 62 | ND - 24.7 ppb |
2019 | 6.67 ppb | 64 | 50 | ND - 24.5 ppb |
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 |
---|---|---|
2014-02-28 | 1610-900-0957 | 38.2 ppb |
2014-02-28 | 1610-901-1241 | 26.3 ppb |
2014-02-28 | 1610-902-0900 | 37.9 ppb |
2014-02-28 | 1610-903-0926 | 36.4 ppb |
2014-02-28 | 1610-904-0910 | 43.6 ppb |
2014-02-28 | 1610-905-1212 | 26.0 ppb |
2014-02-28 | 1610-906-1021 | 40.3 ppb |
2014-02-28 | 1610-907-1225 | 22.6 ppb |
2014-02-28 | 1610-908-0941 | 18.5 ppb |
2014-02-28 | 1610-909-1009 | 24.9 ppb |
2014-02-28 | 1610-910-1032 | 14.4 ppb |
2014-02-28 | 1610-911-1054 | 17.4 ppb |
2014-02-28 | 1610-912-1414 | 22.5 ppb |
2014-02-28 | 1610-913-1351 | 23.7 ppb |
2014-02-28 | 1610-914-1320 | 28.1 ppb |
2014-02-28 | 1610-915-1110 | 2.76 ppb |
2014-05-07 | 1610-900-0925 | 1.40 ppb |
2014-05-07 | 1610-901-1007 | 5.92 ppb |
2014-05-07 | 1610-902-0753 | 19.6 ppb |
2014-05-07 | 1610-903-0913 | 6.03 ppb |
2014-05-07 | 1610-904-0807 | 21.2 ppb |
2014-05-07 | 1610-905-0933 | 3.22 ppb |
2014-05-07 | 1610-906-1035 | 0.700 ppb |
2014-05-07 | 1610-907-0943 | 4.63 ppb |
2014-05-07 | 1610-908-0900 | 10.4 ppb |
2014-05-07 | 1610-909-1025 | 2.46 ppb |
2014-05-07 | 1610-910-1055 | 33.2 ppb |
2014-05-07 | 1610-911-1116 | 9.61 ppb |
2014-05-07 | 1610-912-1323 | 3.23 ppb |
2014-05-07 | 1610-913-1430 | 17.5 ppb |
2014-05-07 | 1610-914-1420 | 17.5 ppb |
2014-05-07 | 1610-915-1235 | 0.550 ppb |
2014-08-25 | 1610-901-1138 | 3.77 ppb |
2014-08-25 | 1610-902-0933 | 12.4 ppb |
2014-08-25 | 1610-904-0947 | 11.7 ppb |
2014-08-25 | 1610-905-1108 | 3.77 ppb |
2014-08-25 | 1610-907-1123 | 3.79 ppb |
2014-08-25 | 1610-908-1025 | 9.22 ppb |
2014-08-25 | 1610-909-1155 | 3.91 ppb |
2014-08-25 | 1610-910-1217 | 18.4 ppb |
2014-08-25 | 1610-911-1333 | 7.74 ppb |
2014-08-25 | 1610-912-1417 | 12.1 ppb |
2014-08-25 | 1610-913-1449 | 9.09 ppb |
2014-08-25 | 1610-914-1438 | 10.7 ppb |
2014-08-25 | 1610-915-1350 | 2.73 ppb |
2014-11-07 | 1610-900-1015 | 7.16 ppb |
2014-11-07 | 1610-901-1055 | 6.20 ppb |
2014-11-07 | 1610-902-0909 | 13.5 ppb |
2014-11-07 | 1610-903-1004 | 6.45 ppb |
2014-11-07 | 1610-904-0920 | 12.1 ppb |
2014-11-07 | 1610-905-1024 | 7.76 ppb |
2014-11-07 | 1610-906-1222 | 6.04 ppb |
2014-11-07 | 1610-907-1040 | 6.49 ppb |
2014-11-07 | 1610-908-0948 | 3.91 ppb |
2014-11-07 | 1610-909-1103 | 4.44 ppb |
2014-11-07 | 1610-910-1243 | 11.9 ppb |
2014-11-07 | 1610-911-1303 | 10.3 ppb |
2014-11-07 | 1610-912-1353 | 10.7 ppb |
2014-11-07 | 1610-913-1427 | 8.95 ppb |
2014-11-07 | 1610-914-1411 | 10.8 ppb |
2014-11-07 | 1610-915-1334 | 2.06 ppb |
2015-02-06 | 1610-900-1014 | 2.61 ppb |
2015-02-06 | 1610-901-0958 | 1.76 ppb |
2015-02-06 | 1610-902-1306 | 3.22 ppb |
2015-02-06 | 1610-903-1228 | 2.78 ppb |
2015-02-06 | 1610-904-1259 | 1.52 ppb |
2015-02-06 | 1610-905-0923 | 2.17 ppb |
2015-02-06 | 1610-906-0858 | 1.80 ppb |
2015-02-06 | 1610-907-0948 | 2.13 ppb |
2015-02-06 | 1610-908-1024 | 8.66 ppb |
2015-02-06 | 1610-909-0913 | 1.92 ppb |
2015-02-06 | 1610-910-1041 | 13.2 ppb |
2015-02-06 | 1610-911-1154 | 12.2 ppb |
2015-02-06 | 1610-912-1339 | 18.7 ppb |
2015-02-06 | 1610-913-1418 | 13.9 ppb |
2015-02-06 | 1610-914-1400 | 14.4 ppb |
2015-02-06 | 1610-915-1051 | 3.00 ppb |
2015-05-29 | 1610-900-1115 | 8.98 ppb |
2015-05-29 | 1610-901-1339 | 1.60 ppb |
2015-05-29 | 1610-902-1000 | 37.0 ppb |
2015-05-29 | 1610-903-1105 | 8.72 ppb |
2015-05-29 | 1610-904-1016 | 37.4 ppb |
2015-05-29 | 1610-905-1310 | 2.07 ppb |
2015-05-29 | 1610-906-1240 | 5.70 ppb |
2015-05-29 | 1610-907-1322 | 1.82 ppb |
2015-05-29 | 1610-908-1050 | 32.0 ppb |
2015-05-29 | 1610-909-1250 | 1.77 ppb |
2015-05-29 | 1610-910-1227 | 15.8 ppb |
2015-05-29 | 1610-911-1403 | 13.2 ppb |
2015-05-29 | 1610-912-1435 | 19.9 ppb |
2015-05-29 | 1610-914-1453 | 23.0 ppb |
2015-05-29 | 1610-915-1216 | 13.8 ppb |
2016-03-04 | 1610-005-1315 | ND |
2016-04-01 | 1610-005-1140 | ND |
2016-05-06 | 1610-900-0907 | 2.87 ppb |
2016-05-06 | 1610-901-1027 | 2.79 ppb |
2016-05-06 | 1610-902-0800 | 7.70 ppb |
2016-05-06 | 1610-903-0852 | 3.16 ppb |
2016-05-06 | 1610-904-0812 | 8.57 ppb |
2016-05-06 | 1610-905-0945 | 3.17 ppb |
2016-05-06 | 1610-906-1045 | 2.87 ppb |
2016-05-06 | 1610-907-1000 | 3.05 ppb |
2016-05-06 | 1610-908-0835 | 6.17 ppb |
2016-05-06 | 1610-909-0925 | 2.95 ppb |
2016-05-06 | 1610-910-1110 | 12.4 ppb |
2016-05-06 | 1610-911-1145 | 10.0 ppb |
2016-05-06 | 1610-912-1320 | 12.3 ppb |
2016-05-06 | 1610-913-1415 | 8.67 ppb |
2016-05-06 | 1610-914-1350 | 10.1 ppb |
2016-05-06 | 1610-915-1255 | 5.14 ppb |
2016-08-19 | 1610-900-1151 | 7.94 ppb |
2016-08-19 | 1610-902-1026 | 10.3 ppb |
2016-08-19 | 1610-903-1142 | 7.89 ppb |
2016-08-19 | 1610-904-1110 | 9.14 ppb |
2016-08-19 | 1610-905-1313 | 8.07 ppb |
2016-08-19 | 1610-906-1350 | 6.96 ppb |
2016-08-19 | 1610-907-1330 | 6.99 ppb |
2016-08-19 | 1610-908-1130 | 9.63 ppb |
2016-08-19 | 1610-909-1343 | 3.74 ppb |
2016-08-19 | 1610-910-1410 | 11.5 ppb |
2016-08-19 | 1610-911-0829 | 7.10 ppb |
2016-08-19 | 1610-912-0915 | 8.23 ppb |
2016-08-19 | 1610-913-0946 | 8.30 ppb |
2016-08-19 | 1610-914-0938 | 9.56 ppb |
2016-08-19 | 1610-915-0855 | ND |
2016-11-01 | 1610-900-1041 | 8.13 ppb |
2016-11-01 | 1610-901-1145 | 9.53 ppb |
2016-11-01 | 1610-902-0943 | 12.9 ppb |
2016-11-01 | 1610-903-1032 | 8.30 ppb |
2016-11-01 | 1610-904-0954 | 11.8 ppb |
2016-11-01 | 1610-905-1117 | 10.0 ppb |
2016-11-01 | 1610-906-1050 | 7.73 ppb |
2016-11-01 | 1610-907-1130 | 6.30 ppb |
2016-11-01 | 1610-908-1013 | 11.8 ppb |
2016-11-01 | 1610-909-1103 | 11.9 ppb |
2016-11-01 | 1610-910-1231 | 13.2 ppb |
2016-11-01 | 1610-911-1207 | 8.13 ppb |
2016-11-01 | 1610-912-1432 | 10.2 ppb |
2016-11-01 | 1610-913-1357 | 9.48 ppb |
2016-11-01 | 1610-914-1412 | 12.2 ppb |
2016-11-01 | 1610-915-1245 | 11.4 ppb |
2017-02-10 | 1610-900-0836 | 14.8 ppb |
2017-02-10 | 1610-901-0915 | 5.62 ppb |
2017-02-10 | 1610-902-0743 | 22.2 ppb |
2017-02-10 | 1610-903-0826 | 12.3 ppb |
2017-02-10 | 1610-904-0750 | 21.2 ppb |
2017-02-10 | 1610-905-0850 | 6.87 ppb |
2017-02-10 | 1610-906-0943 | 14.2 ppb |
2017-02-10 | 1610-907-0902 | 6.85 ppb |
2017-02-10 | 1610-908-0811 | 17.5 ppb |
2017-02-10 | 1610-909-0933 | 7.97 ppb |
2017-02-10 | 1610-910-1000 | 28.7 ppb |
2017-02-10 | 1610-911-1046 | 14.2 ppb |
2017-02-10 | 1610-912-1230 | 11.2 ppb |
2017-02-10 | 1610-913-1300 | 10.7 ppb |
2017-02-10 | 1610-914-1300 | 12.4 ppb |
2017-02-10 | 1610-915-1011 | 2.21 ppb |
2017-05-15 | 1610-900-1016 | 3.03 ppb |
2017-05-15 | 1610-901-1345 | 3.38 ppb |
2017-05-15 | 1610-902-0903 | 2.07 ppb |
2017-05-15 | 1610-903-1007 | 2.95 ppb |
2017-05-15 | 1610-904-0915 | ND |
2017-05-15 | 1610-905-1317 | 3.47 ppb |
2017-05-15 | 1610-906-1032 | 3.04 ppb |
2017-05-15 | 1610-907-1329 | 4.71 ppb |
2017-05-15 | 1610-908-0938 | 3.16 ppb |
2017-05-15 | 1610-909-1023 | 4.22 ppb |
2017-05-15 | 1610-910-1115 | 1.68 ppb |
2017-05-15 | 1610-911-1252 | 3.24 ppb |
2017-05-15 | 1610-912-1414 | 2.90 ppb |
2017-05-15 | 1610-913-1445 | 6.06 ppb |
2017-05-15 | 1610-914-1435 | 3.04 ppb |
2017-05-15 | 1610-915-1028 | 7.11 ppb |
2017-08-14 | 1610-900-1011 | 7.75 ppb |
2017-08-14 | 1610-902-0919 | 9.40 ppb |
2017-08-14 | 1610-903-1000 | 7.00 ppb |
2017-08-14 | 1610-904-0930 | 9.20 ppb |
2017-08-14 | 1610-905-1050 | 4.64 ppb |
2017-08-14 | 1610-906-1023 | 6.86 ppb |
2017-08-14 | 1610-907-1111 | 5.81 ppb |
2017-08-14 | 1610-908-0948 | 7.11 ppb |
2017-08-14 | 1610-909-1300 | 2.63 ppb |
2017-08-14 | 1610-911-1235 | 9.60 ppb |
2017-08-14 | 1610-912-1318 | 8.20 ppb |
2017-08-14 | 1610-913-1407 | 3.61 ppb |
2017-08-14 | 1610-914-1343 | 4.03 ppb |
2017-08-14 | 1610-915-1255 | 1.56 ppb |
2017-11-01 | 1610-900-1009 | 3.89 ppb |
2017-11-01 | 1610-901-1125 | 6.09 ppb |
2017-11-01 | 1610-902-0915 | 5.21 ppb |
2017-11-01 | 1610-903-1002 | 3.46 ppb |
2017-11-01 | 1610-904-0900 | 5.14 ppb |
2017-11-01 | 1610-905-1043 | 6.32 ppb |
2017-11-01 | 1610-906-1032 | 4.11 ppb |
2017-11-01 | 1610-907-1051 | 8.56 ppb |
2017-11-01 | 1610-908-0950 | 2.92 ppb |
2017-11-01 | 1610-909-1023 | 5.25 ppb |
2017-11-01 | 1610-910-1201 | 4.96 ppb |
2017-11-01 | 1610-911-1255 | 5.97 ppb |
2017-11-01 | 1610-912-1337 | 5.35 ppb |
2017-11-01 | 1610-913-1410 | 3.72 ppb |
2017-11-01 | 1610-914-1400 | 4.59 ppb |
2017-11-01 | 1610-915-1317 | ND |
2018-02-12 | 1610-900-1058 | 11.0 ppb |
2018-02-12 | 1610-901-1243 | 2.69 ppb |
2018-02-12 | 1610-902-0931 | 12.9 ppb |
2018-02-12 | 1610-903-1050 | 10.8 ppb |
2018-02-12 | 1610-904-0940 | 15.8 ppb |
2018-02-12 | 1610-905-1213 | 3.25 ppb |
2018-02-12 | 1610-906-1119 | 13.8 ppb |
2018-02-12 | 1610-907-1227 | 3.54 ppb |
2018-02-12 | 1610-908-1011 | 14.4 ppb |
2018-02-12 | 1610-909-1146 | 3.37 ppb |
2018-02-12 | 1610-910-1302 | 2.59 ppb |
2018-02-12 | 1610-911-1337 | 10.8 ppb |
2018-02-12 | 1610-912-1416 | 15.3 ppb |
2018-02-12 | 1610-913-1449 | 17.6 ppb |
2018-02-12 | 1610-914-1441 | 11.5 ppb |
2018-02-12 | 1610-915-1315 | ND |
2018-05-07 | 1610-900-1022 | 2.26 ppb |
2018-05-07 | 1610-901-1150 | 1.79 ppb |
2018-05-07 | 1610-902-0918 | 13.2 ppb |
2018-05-07 | 1610-903-1014 | 3.25 ppb |
2018-05-07 | 1610-904-0929 | 18.9 ppb |
2018-05-07 | 1610-905-1121 | 1.59 ppb |
2018-05-07 | 1610-906-1045 | 1.84 ppb |
2018-05-07 | 1610-907-1130 | 1.24 ppb |
2018-05-07 | 1610-908-0955 | 10.9 ppb |
2018-05-07 | 1610-909-1036 | 2.06 ppb |
2018-05-07 | 1610-910-1207 | 16.3 ppb |
2018-05-07 | 1610-911-1314 | 16.6 ppb |
2018-05-07 | 1610-913-1348 | 9.98 ppb |
2018-05-07 | 1610-914-1405 | 8.75 ppb |
2018-05-07 | 1610-915-1217 | 2.38 ppb |
2018-05-08 | 1610-912-1254 | 16.6 ppb |
2018-08-02 | 1610-900-1004 | 3.90 ppb |
2018-08-02 | 1610-901-1105 | 3.03 ppb |
2018-08-02 | 1610-902-0910 | 14.5 ppb |
2018-08-02 | 1610-903-0954 | 7.53 ppb |
2018-08-02 | 1610-904-0920 | 14.5 ppb |
2018-08-02 | 1610-905-1046 | 2.11 ppb |
2018-08-02 | 1610-906-1038 | 5.21 ppb |
2018-08-02 | 1610-907-1055 | 2.08 ppb |
2018-08-02 | 1610-908-0941 | 12.3 ppb |
2018-08-02 | 1610-909-1021 | 2.22 ppb |
2018-08-02 | 1610-910-1139 | 12.8 ppb |
2018-08-02 | 1610-911-1300 | 13.8 ppb |
2018-08-02 | 1610-912-1331 | 11.6 ppb |
2018-08-02 | 1610-913-1410 | 7.99 ppb |
2018-08-02 | 1610-914-1400 | 8.26 ppb |
2018-08-02 | 1610-915-1236 | ND |
2018-11-05 | 1610-900-1055 | 5.38 ppb |
2018-11-05 | 1610-901-1230 | 1.89 ppb |
2018-11-05 | 1610-902-0935 | 19.2 ppb |
2018-11-05 | 1610-903-1045 | 7.00 ppb |
2018-11-05 | 1610-904-0947 | 21.6 ppb |
2018-11-05 | 1610-905-1156 | 1.87 ppb |
2018-11-05 | 1610-906-1119 | 4.53 ppb |
2018-11-05 | 1610-907-1204 | 1.17 ppb |
2018-11-05 | 1610-908-1011 | 24.7 ppb |
2018-11-05 | 1610-909-1109 | 2.06 ppb |
2018-11-05 | 1610-910-1358 | 19.5 ppb |
2018-11-05 | 1610-911-1418 | 13.7 ppb |
2018-11-05 | 1610-915-1342 | 5.66 ppb |
2018-11-06 | 1610-912-1138 | 16.2 ppb |
2018-11-06 | 1610-913-1430 | 18.9 ppb |
2018-11-06 | 1610-914-1415 | 15.0 ppb |
2019-02-11 | 1610-900-1107 | ND |
2019-02-11 | 1610-901-1219 | ND |
2019-02-11 | 1610-902-0842 | 15.1 ppb |
2019-02-11 | 1610-903-1055 | ND |
2019-02-11 | 1610-904-0902 | 13.1 ppb |
2019-02-11 | 1610-905-1139 | ND |
2019-02-11 | 1610-906-1339 | ND |
2019-02-11 | 1610-907-1200 | ND |
2019-02-11 | 1610-908-1007 | 13.4 ppb |
2019-02-11 | 1610-909-1237 | ND |
2019-02-11 | 1610-910-1401 | ND |
2019-02-11 | 1610-915-1424 | 1.64 ppb |
2019-02-12 | 1610-911-0955 | 11.8 ppb |
2019-02-12 | 1610-912-1119 | 15.2 ppb |
2019-02-12 | 1610-913-1335 | 24.5 ppb |
2019-02-12 | 1610-914-1320 | 17.4 ppb |
2019-05-08 | 1610-900-1030 | ND |
2019-05-08 | 1610-901-1145 | ND |
2019-05-08 | 1610-902-0915 | 20.4 ppb |
2019-05-08 | 1610-903-1020 | 3.15 ppb |
2019-05-08 | 1610-904-0931 | 19.3 ppb |
2019-05-08 | 1610-905-1120 | ND |
2019-05-08 | 1610-906-1100 | ND |
2019-05-08 | 1610-907-1135 | ND |
2019-05-08 | 1610-908-0951 | 3.85 ppb |
2019-05-08 | 1610-909-1045 | ND |
2019-05-08 | 1610-910-1235 | 7.16 ppb |
2019-05-08 | 1610-911-1215 | 11.5 ppb |
2019-05-08 | 1610-912-1310 | 14.3 ppb |
2019-05-08 | 1610-913-1415 | 2.49 ppb |
2019-05-08 | 1610-914-1345 | 3.59 ppb |
2019-05-08 | 1610-915-1247 | 4.75 ppb |
2019-08-14 | 1610-900-0709 | 1.57 ppb |
2019-08-14 | 1610-901-0812 | 1.61 ppb |
2019-08-14 | 1610-902-0600 | 21.5 ppb |
2019-08-14 | 1610-903-0700 | 1.75 ppb |
2019-08-14 | 1610-904-1046 | 22.6 ppb |
2019-08-14 | 1610-905-0752 | 1.50 ppb |
2019-08-14 | 1610-906-0743 | 1.63 ppb |
2019-08-14 | 1610-907-0800 | 1.28 ppb |
2019-08-14 | 1610-908-0639 | 17.0 ppb |
2019-08-14 | 1610-909-0724 | 1.72 ppb |
2019-08-14 | 1610-910-0836 | 6.62 ppb |
2019-08-14 | 1610-911-0907 | 12.3 ppb |
2019-08-14 | 1610-912-1028 | 15.7 ppb |
2019-08-14 | 1610-913-1123 | 4.53 ppb |
2019-08-14 | 1610-914-1100 | 4.54 ppb |
2019-08-14 | 1610-915-0848 | 4.54 ppb |
2019-11-20 | 1610-900-1130 | 6.23 ppb |
2019-11-20 | 1610-901-1028 | 2.65 ppb |
2019-11-20 | 1610-902-1011 | 14.8 ppb |
2019-11-20 | 1610-903-1120 | 6.37 ppb |
2019-11-20 | 1610-904-0922 | 11.3 ppb |
2019-11-20 | 1610-905-0953 | 2.45 ppb |
2019-11-20 | 1610-906-1059 | 4.42 ppb |
2019-11-20 | 1610-907-1008 | 1.93 ppb |
2019-11-20 | 1610-908-0929 | 3.69 ppb |
2019-11-20 | 1610-909-1047 | 2.10 ppb |
2019-11-20 | 1610-910-1121 | 8.88 ppb |
2019-11-20 | 1610-911-1150 | 11.8 ppb |
2019-11-20 | 1610-912-1408 | 6.12 ppb |
2019-11-20 | 1610-913-1420 | 13.4 ppb |
2019-11-20 | 1610-914-1400 | 5.63 ppb |
2019-11-20 | 1610-915-1311 | 2.22 ppb |