Dibromochloromethane
California Water Service - South San Francisco
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 | 0.634 ppb | 123 | 48 | ND - 3.31 ppb |
2015 | 0.539 ppb | 98 | 38 | ND - 3.06 ppb |
2016 | 0.664 ppb | 61 | 28 | ND - 3.30 ppb |
2017 | 1.20 ppb | 40 | 20 | ND - 5.30 ppb |
2018 | 0.328 ppb | 32 | 4 | ND - 3.08 ppb |
2019 | 0.555 ppb | 32 | 11 | ND - 2.71 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 |
---|---|---|
2014-01-09 | 5701-013-0940 | ND |
2014-01-14 | 5701-009-1132 | 1.59 ppb |
2014-01-14 | 5701-010-1138 | 2.86 ppb |
2014-01-14 | 5701-011-1130 | ND |
2014-01-28 | 5701-013-0922 | ND |
2014-02-04 | 5701-013-1006 | ND |
2014-02-05 | 5701-009-1031 | 1.26 ppb |
2014-02-05 | 5701-010-1013 | 2.70 ppb |
2014-02-05 | 5701-011-1030 | ND |
2014-02-11 | 5701-013-1327 | ND |
2014-02-19 | 5701-013-1335 | ND |
2014-02-25 | 5701-003-1325 | ND |
2014-02-25 | 5701-013-1048 | ND |
2014-03-04 | 5701-013-1004 | ND |
2014-03-05 | 5701-009-1403 | 0.940 ppb |
2014-03-05 | 5701-010-1410 | 1.14 ppb |
2014-03-05 | 5701-011-1400 | ND |
2014-03-10 | 5701-010-1350 | 1.32 ppb |
2014-03-10 | 5701-900-0805 | 1.72 ppb |
2014-03-10 | 5701-901-0845 | 1.50 ppb |
2014-03-10 | 5701-902-1035 | 1.49 ppb |
2014-03-10 | 5701-903-0825 | 2.00 ppb |
2014-03-10 | 5701-904-0905 | 3.18 ppb |
2014-03-10 | 5701-906-1015 | ND |
2014-03-10 | 5701-907-1305 | ND |
2014-03-11 | 5701-013-1340 | ND |
2014-03-16 | 5701-013-0937 | ND |
2014-03-18 | 5701-006-1048 | ND |
2014-03-18 | 5701-007-1100 | ND |
2014-03-18 | 5701-008-1037 | ND |
2014-03-18 | 5701-014-1021 | ND |
2014-03-27 | 5701-013-1038 | ND |
2014-04-03 | 5701-013-1130 | ND |
2014-04-08 | 5701-013-1100 | ND |
2014-04-15 | 5701-009-1329 | 1.34 ppb |
2014-04-15 | 5701-010-1334 | 1.04 ppb |
2014-04-15 | 5701-011-1325 | ND |
2014-04-15 | 5701-013-1117 | ND |
2014-04-29 | 5701-013-0910 | ND |
2014-05-05 | 5701-013-1134 | ND |
2014-05-14 | 5701-013-0842 | ND |
2014-05-20 | 5701-009-1121 | 1.31 ppb |
2014-05-20 | 5701-010-1138 | 0.810 ppb |
2014-05-20 | 5701-011-1119 | ND |
2014-05-20 | 5701-013-1100 | ND |
2014-05-27 | 5701-013-1050 | ND |
2014-06-04 | 5701-009-0830 | 1.18 ppb |
2014-06-04 | 5701-010-0840 | 1.48 ppb |
2014-06-04 | 5701-011-0828 | ND |
2014-06-04 | 5701-013-1130 | ND |
2014-06-09 | 5701-010-1340 | 1.19 ppb |
2014-06-09 | 5701-013-1117 | ND |
2014-06-09 | 5701-900-0815 | 1.29 ppb |
2014-06-09 | 5701-901-1130 | 1.53 ppb |
2014-06-09 | 5701-902-1350 | 1.15 ppb |
2014-06-09 | 5701-903-1115 | 2.45 ppb |
2014-06-09 | 5701-904-1145 | 2.33 ppb |
2014-06-09 | 5701-906-1415 | 3.16 ppb |
2014-06-09 | 5701-907-1100 | ND |
2014-06-17 | 5701-013-1125 | ND |
2014-07-09 | 5701-013-1011 | ND |
2014-07-15 | 5701-013-1136 | ND |
2014-07-16 | 5701-009-1127 | 1.20 ppb |
2014-07-16 | 5701-010-1138 | 1.29 ppb |
2014-07-16 | 5701-011-1124 | ND |
2014-07-22 | 5701-013-1140 | ND |
2014-07-29 | 5701-013-1137 | ND |
2014-08-05 | 5701-013-1530 | ND |
2014-08-13 | 5810-009-0840 | 1.40 ppb |
2014-08-13 | 5810-010-0850 | 2.40 ppb |
2014-08-13 | 5810-011-0837 | ND |
2014-08-13 | 5810-013-0815 | ND |
2014-08-18 | 5701-013-1103 | ND |
2014-08-26 | 5701-013-1126 | ND |
2014-09-03 | 5701-013-1027 | ND |
2014-09-08 | 5701-013-1025 | ND |
2014-09-11 | 5701-010-0857 | 1.14 ppb |
2014-09-11 | 5701-900-1107 | ND |
2014-09-11 | 5701-901-1051 | 1.41 ppb |
2014-09-11 | 5701-902-1122 | 1.29 ppb |
2014-09-11 | 5701-903-0908 | 1.86 ppb |
2014-09-11 | 5701-904-0943 | 1.85 ppb |
2014-09-11 | 5701-906-1036 | 2.28 ppb |
2014-09-11 | 5701-907-0924 | ND |
2014-09-16 | 5701-009-0912 | 1.28 ppb |
2014-09-16 | 5701-010-0940 | 1.23 ppb |
2014-09-16 | 5701-011-0910 | ND |
2014-09-16 | 5701-013-0855 | ND |
2014-09-23 | 5701-013-1330 | ND |
2014-09-25 | 5701-006-1321 | ND |
2014-09-25 | 5701-007-1328 | ND |
2014-09-25 | 5701-008-1313 | ND |
2014-09-25 | 5701-014-1355 | ND |
2014-10-02 | 5701-009-1113 | 1.58 ppb |
2014-10-02 | 5701-010-1118 | ND |
2014-10-02 | 5701-011-1112 | ND |
2014-11-04 | 5701-013-1111 | ND |
2014-11-12 | 5701-009-1320 | 0.990 ppb |
2014-11-12 | 5701-010-1337 | 1.31 ppb |
2014-11-12 | 5701-011-1318 | ND |
2014-11-12 | 5701-013-1107 | ND |
2014-11-18 | 5701-013-1122 | ND |
2014-11-19 | 5701-003-1111 | ND |
2014-11-24 | 5701-013-1320 | ND |
2014-12-02 | 5701-013-0911 | ND |
2014-12-04 | 5701-009-1343 | 1.04 ppb |
2014-12-04 | 5701-010-1356 | 1.18 ppb |
2014-12-04 | 5701-011-1342 | ND |
2014-12-08 | 5701-010-0717 | 1.67 ppb |
2014-12-08 | 5701-900-0717 | 1.99 ppb |
2014-12-08 | 5701-901-0717 | 1.04 ppb |
2014-12-08 | 5701-902-0717 | 1.08 ppb |
2014-12-08 | 5701-903-0717 | 2.15 ppb |
2014-12-08 | 5701-904-0717 | 3.31 ppb |
2014-12-08 | 5701-906-0717 | ND |
2014-12-08 | 5701-907-0717 | ND |
2014-12-09 | 5701-013-1022 | ND |
2014-12-16 | 5701-013-1416 | ND |
2014-12-17 | 5701-006-1025 | ND |
2014-12-17 | 5701-007-1032 | ND |
2014-12-17 | 5701-008-1004 | ND |
2014-12-21 | 9590-013-1430 | ND |
2014-12-30 | 9590-013-1035 | ND |
2015-01-05 | 5701-013-1330 | ND |
2015-01-07 | 5701-009-1135 | 1.03 ppb |
2015-01-07 | 5701-010-1146 | 2.03 ppb |
2015-01-07 | 5701-011-1132 | ND |
2015-01-13 | 5701-013-1101 | ND |
2015-01-20 | 5701-013-1100 | ND |
2015-01-26 | 5701-013-1029 | ND |
2015-02-02 | 5701-013-1034 | ND |
2015-02-11 | 5701-009-0902 | 1.01 ppb |
2015-02-11 | 5701-010-0911 | 2.07 ppb |
2015-02-11 | 5701-011-0900 | ND |
2015-02-11 | 5701-013-0920 | ND |
2015-02-11 | 5701-014-1033 | ND |
2015-02-17 | 5701-013-0952 | ND |
2015-02-18 | 5701-003-1040 | ND |
2015-02-23 | 5701-013-1101 | ND |
2015-03-03 | 5701-013-1342 | ND |
2015-03-04 | 5701-009-0938 | 0.940 ppb |
2015-03-04 | 5701-010-0948 | 1.25 ppb |
2015-03-04 | 5701-011-0939 | ND |
2015-03-10 | 5701-010-0937 | 1.19 ppb |
2015-03-10 | 5701-013-1355 | ND |
2015-03-10 | 5701-900-0939 | 1.82 ppb |
2015-03-10 | 5701-901-0939 | 1.72 ppb |
2015-03-10 | 5701-902-0939 | 1.20 ppb |
2015-03-10 | 5701-903-0937 | 2.33 ppb |
2015-03-10 | 5701-904-0937 | 3.06 ppb |
2015-03-10 | 5701-906-0939 | 2.00 ppb |
2015-03-10 | 5701-907-0937 | ND |
2015-03-16 | 5701-013-1121 | ND |
2015-03-19 | 5701-006-1041 | ND |
2015-03-19 | 5701-007-1053 | ND |
2015-03-19 | 5701-008-1021 | ND |
2015-03-24 | 5701-013-1117 | ND |
2015-03-31 | 5701-013-1310 | ND |
2015-04-07 | 5701-009-1405 | 0.810 ppb |
2015-04-07 | 5701-010-1430 | 1.28 ppb |
2015-04-07 | 5701-011-1400 | ND |
2015-04-07 | 5701-013-1340 | ND |
2015-04-14 | 5701-013-1435 | ND |
2015-04-22 | 5701-013-1334 | ND |
2015-04-28 | 5701-013-0950 | ND |
2015-05-06 | 9590-009-1425 | ND |
2015-05-06 | 9590-010-1502 | 1.10 ppb |
2015-05-06 | 9590-011-1421 | ND |
2015-05-06 | 9590-013-1400 | ND |
2015-05-13 | 9590-013-1321 | ND |
2015-05-19 | 5701-013-1039 | ND |
2015-05-21 | 5701-003-1336 | ND |
2015-05-26 | 5701-013-1136 | ND |
2015-05-27 | 5701-014-1332 | ND |
2015-06-01 | 5701-013-1130 | ND |
2015-06-02 | 5701-009-1006 | 0.960 ppb |
2015-06-02 | 5701-010-1017 | 1.29 ppb |
2015-06-02 | 5701-011-1005 | ND |
2015-06-09 | 5701-013-1000 | ND |
2015-06-15 | 5701-010-0759 | 1.06 ppb |
2015-06-15 | 5701-013-1352 | ND |
2015-06-15 | 5701-900-0759 | ND |
2015-06-15 | 5701-901-0759 | 1.36 ppb |
2015-06-15 | 5701-902-0759 | 1.14 ppb |
2015-06-15 | 5701-903-0759 | 2.22 ppb |
2015-06-15 | 5701-904-0759 | 2.48 ppb |
2015-06-15 | 5701-906-0759 | 2.00 ppb |
2015-06-16 | 5701-907-0855 | ND |
2015-06-18 | 5701-006-1142 | ND |
2015-06-18 | 5701-007-1428 | ND |
2015-06-18 | 5701-008-1455 | ND |
2015-06-23 | 5701-013-1005 | ND |
2015-06-30 | 5701-013-0915 | ND |
2015-07-06 | 5701-013-0909 | ND |
2015-07-07 | 5701-009-1126 | 0.900 ppb |
2015-07-07 | 5701-010-1317 | 1.44 ppb |
2015-07-07 | 5701-011-1124 | ND |
2015-08-26 | 5701-003-1410 | ND |
2015-08-26 | 5701-006-1420 | ND |
2015-09-16 | 5701-010-0832 | 0.620 ppb |
2015-09-16 | 5701-900-0832 | 1.15 ppb |
2015-09-16 | 5701-901-0832 | 0.700 ppb |
2015-09-16 | 5701-902-0832 | 0.600 ppb |
2015-09-16 | 5701-903-0832 | 1.07 ppb |
2015-09-16 | 5701-904-0832 | 2.05 ppb |
2015-09-16 | 5701-906-0832 | 1.91 ppb |
2015-09-16 | 5701-907-0832 | 0.650 ppb |
2015-11-16 | 5701-003-1320 | ND |
2015-11-16 | 5701-006-1327 | ND |
2015-11-16 | 5701-009-1336 | 0.840 ppb |
2015-11-16 | 5701-010-1141 | 0.980 ppb |
2015-11-16 | 5701-011-1339 | ND |
2015-11-18 | 5810-014-1111 | ND |
2015-12-15 | 5701-900-0803 | 0.560 ppb |
2015-12-15 | 5701-901-0803 | ND |
2015-12-15 | 5701-902-0803 | ND |
2015-12-15 | 5701-906-0803 | ND |
2015-12-16 | 5810-010-1259 | ND |
2015-12-16 | 5810-903-1032 | ND |
2015-12-16 | 5810-904-1146 | 2.00 ppb |
2015-12-16 | 5810-907-1103 | ND |
2016-02-16 | 5701-013-0957 | ND |
2016-02-17 | 5701-003-1001 | ND |
2016-02-17 | 5701-006-1008 | ND |
2016-02-17 | 5701-009-0934 | 0.870 ppb |
2016-02-17 | 5701-010-0947 | 1.46 ppb |
2016-02-17 | 5701-011-0931 | ND |
2016-03-02 | 5701-009-1133 | 0.940 ppb |
2016-03-02 | 5701-010-1150 | 1.63 ppb |
2016-03-02 | 5701-011-1134 | ND |
2016-03-15 | 5701-010-0824 | 1.30 ppb |
2016-03-15 | 5701-900-0824 | 1.66 ppb |
2016-03-15 | 5701-901-0824 | 1.57 ppb |
2016-03-15 | 5701-902-0824 | 1.36 ppb |
2016-03-15 | 5701-903-0824 | 1.79 ppb |
2016-03-15 | 5701-904-0824 | 2.45 ppb |
2016-03-15 | 5701-906-0824 | ND |
2016-03-15 | 5701-907-0824 | ND |
2016-03-16 | 9590-014-1407 | ND |
2016-04-11 | 5701-009-0913 | 0.970 ppb |
2016-04-11 | 5701-010-0926 | 1.77 ppb |
2016-04-11 | 5701-011-0905 | ND |
2016-05-11 | 5701-009-0846 | 0.960 ppb |
2016-05-11 | 5701-010-0938 | 1.68 ppb |
2016-05-11 | 5701-011-0844 | ND |
2016-05-17 | 5701-003-1037 | ND |
2016-05-17 | 5701-006-1044 | ND |
2016-05-17 | 5701-013-1053 | ND |
2016-06-07 | 5701-009-0955 | 0.960 ppb |
2016-06-07 | 5701-010-1011 | 1.39 ppb |
2016-06-07 | 5701-011-0955 | ND |
2016-06-13 | 5701-010-1423 | ND |
2016-06-13 | 5701-900-1423 | ND |
2016-06-13 | 5701-901-1423 | ND |
2016-06-13 | 5701-902-1423 | ND |
2016-06-13 | 5701-903-1423 | 0.730 ppb |
2016-06-13 | 5701-904-1423 | 1.44 ppb |
2016-06-13 | 5701-906-1423 | 2.56 ppb |
2016-06-13 | 5701-907-1423 | ND |
2016-09-14 | 5701-010-0827 | 0.810 ppb |
2016-09-14 | 5701-900-0827 | 0.890 ppb |
2016-09-14 | 5701-901-0827 | 0.640 ppb |
2016-09-14 | 5701-902-0827 | 0.990 ppb |
2016-09-14 | 5701-903-0827 | 0.770 ppb |
2016-09-14 | 5701-904-0827 | ND |
2016-09-14 | 5701-906-0827 | 3.25 ppb |
2016-09-14 | 5701-907-0827 | 0.890 ppb |
2016-09-26 | 5701-013-1024 | ND |
2016-09-27 | 5701-003-0950 | ND |
2016-09-27 | 5701-006-1000 | ND |
2016-11-28 | 5701-003-1156 | ND |
2016-11-28 | 5701-006-1134 | ND |
2016-11-29 | 5701-013-1010 | ND |
2016-12-06 | 5701-014-1008 | ND |
2016-12-12 | 5810-010-1448 | ND |
2016-12-12 | 5810-900-1403 | ND |
2016-12-12 | 5810-901-1312 | ND |
2016-12-12 | 5810-902-1346 | ND |
2016-12-12 | 5810-903-1425 | ND |
2016-12-12 | 5810-904-1437 | ND |
2016-12-12 | 5810-906-1331 | 3.30 ppb |
2016-12-12 | 5810-907-1416 | 1.50 ppb |
2017-03-06 | 5810-010-1342 | 4.80 ppb |
2017-03-13 | 5810-010-1350 | 5.30 ppb |
2017-03-15 | 5810-900-1033 | 1.90 ppb |
2017-03-15 | 5810-901-1021 | 2.00 ppb |
2017-03-15 | 5810-902-1047 | 2.40 ppb |
2017-03-15 | 5810-906-1100 | 3.20 ppb |
2017-03-16 | 5701-903-0920 | 1.10 ppb |
2017-03-16 | 5701-904-0920 | 1.72 ppb |
2017-03-16 | 5701-907-0920 | 1.11 ppb |
2017-03-27 | 5810-010-0941 | ND |
2017-06-02 | 5701-902-1321 | 1.000 ppb |
2017-06-02 | 5701-904-1314 | 1.37 ppb |
2017-06-12 | 5810-010-1055 | 1.80 ppb |
2017-06-12 | 5701-900-0800 | 2.94 ppb |
2017-06-12 | 5701-901-0800 | 2.05 ppb |
2017-06-12 | 5701-902-0800 | 1.96 ppb |
2017-06-12 | 5810-903-1005 | 2.00 ppb |
2017-06-12 | 5810-904-1125 | 1.90 ppb |
2017-06-12 | 5701-906-0800 | 3.78 ppb |
2017-06-12 | 5810-907-0945 | 2.90 ppb |
2017-09-12 | 5810-010-0810 | ND |
2017-09-12 | 5810-900-0910 | ND |
2017-09-12 | 5810-901-0940 | ND |
2017-09-12 | 5810-902-0820 | ND |
2017-09-12 | 5810-903-0930 | ND |
2017-09-12 | 5810-904-0950 | ND |
2017-09-12 | 5810-906-1005 | ND |
2017-09-12 | 5810-907-0840 | ND |
2017-11-28 | 9590-006-1130 | ND |
2017-11-28 | 9590-008-1500 | ND |
2017-11-28 | 9590-013-1230 | ND |
2017-11-28 | 9590-014-1056 | ND |
2017-12-14 | 5810-010-1039 | ND |
2017-12-14 | 5701-900-0825 | ND |
2017-12-14 | 5701-901-0825 | ND |
2017-12-14 | 5701-902-0825 | ND |
2017-12-14 | 5810-903-1122 | ND |
2017-12-14 | 5810-904-1110 | ND |
2017-12-14 | 5701-906-0825 | 2.80 ppb |
2017-12-14 | 5810-907-1147 | ND |
2018-03-14 | 5701-010-0836 | ND |
2018-03-14 | 5701-900-0836 | ND |
2018-03-14 | 5701-901-0836 | ND |
2018-03-14 | 5701-902-0836 | ND |
2018-03-14 | 5701-903-0836 | ND |
2018-03-14 | 5701-904-0836 | ND |
2018-03-14 | 5701-906-0836 | 2.74 ppb |
2018-03-14 | 5701-907-0836 | ND |
2018-06-11 | 5701-010-0853 | ND |
2018-06-11 | 5701-900-0853 | ND |
2018-06-11 | 5701-901-0853 | ND |
2018-06-11 | 5701-902-0853 | ND |
2018-06-11 | 5701-903-0853 | ND |
2018-06-11 | 5701-904-0853 | ND |
2018-06-11 | 5701-906-0853 | 3.08 ppb |
2018-06-11 | 5701-907-0853 | ND |
2018-09-11 | 5701-010-0818 | ND |
2018-09-11 | 5701-900-0818 | ND |
2018-09-11 | 5701-901-0818 | ND |
2018-09-11 | 5701-902-0818 | ND |
2018-09-11 | 5701-903-0818 | ND |
2018-09-11 | 5701-904-0818 | ND |
2018-09-11 | 5701-906-0818 | 2.90 ppb |
2018-09-11 | 5701-907-0818 | ND |
2018-12-12 | 5701-010-0919 | ND |
2018-12-12 | 5701-900-0919 | ND |
2018-12-12 | 5701-901-0919 | ND |
2018-12-12 | 5701-902-0919 | ND |
2018-12-12 | 5701-903-0919 | ND |
2018-12-12 | 5701-904-0919 | ND |
2018-12-12 | 5701-906-0919 | 1.79 ppb |
2018-12-12 | 5701-907-0919 | ND |
2019-03-12 | 5701-010-0900 | 1.49 ppb |
2019-03-12 | 5701-900-0900 | 1.78 ppb |
2019-03-12 | 5701-901-0900 | 1.43 ppb |
2019-03-12 | 5701-902-0900 | 1.57 ppb |
2019-03-12 | 5701-903-0900 | 1.51 ppb |
2019-03-12 | 5701-904-0900 | 1.22 ppb |
2019-03-12 | 5701-906-0900 | 1.92 ppb |
2019-03-12 | 5701-907-0900 | 1.55 ppb |
2019-06-12 | 5701-010-0922 | ND |
2019-06-12 | 5701-900-0922 | ND |
2019-06-12 | 5701-901-0922 | ND |
2019-06-12 | 5701-902-0922 | ND |
2019-06-12 | 5701-903-0922 | ND |
2019-06-12 | 5701-904-0922 | ND |
2019-06-12 | 5701-906-0922 | ND |
2019-06-12 | 5701-907-0922 | ND |
2019-09-10 | 5701-010-0910 | ND |
2019-09-10 | 5701-900-0800 | ND |
2019-09-10 | 5701-901-0840 | ND |
2019-09-10 | 5701-902-0920 | ND |
2019-09-10 | 5701-903-0830 | ND |
2019-09-10 | 5701-904-0850 | ND |
2019-09-10 | 5701-906-1040 | 2.71 ppb |
2019-09-10 | 5701-907-0815 | 0.560 ppb |
2019-12-12 | 5701-010-0917 | ND |
2019-12-12 | 5701-900-0731 | ND |
2019-12-12 | 5701-901-0840 | ND |
2019-12-12 | 5701-902-0856 | ND |
2019-12-12 | 5701-903-0828 | ND |
2019-12-12 | 5701-904-0816 | ND |
2019-12-12 | 5701-906-0935 | 2.01 ppb |
2019-12-12 | 5701-907-0800 | ND |