Bromodichloromethane
California Water Service Co-leona Valley
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 |
---|---|---|---|---|
2014 | 3.61 ppb | 30 | 22 | ND - 12.4 ppb |
2015 | 6.48 ppb | 41 | 37 | ND - 16.5 ppb |
2016 | 9.54 ppb | 40 | 38 | ND - 30.7 ppb |
2017 | 10.7 ppb | 40 | 38 | ND - 20.0 ppb |
2018 | 12.9 ppb | 46 | 44 | ND - 29.0 ppb |
2019 | 13.7 ppb | 43 | 42 | ND - 27.8 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 | 5701-005-1027 | 2.69 ppb |
2014-01-21 | 5701-008-1129 | 1.83 ppb |
2014-02-11 | 5701-005-1017 | 3.08 ppb |
2014-02-18 | 5701-001-1113 | ND |
2014-02-18 | 5701-006-1123 | ND |
2014-03-04 | 5701-005-1454 | 3.93 ppb |
2014-04-08 | 5701-005-1259 | 3.34 ppb |
2014-05-13 | 5701-005-1152 | 1.69 ppb |
2014-05-27 | 5701-001-1212 | ND |
2014-05-27 | 5701-006-1215 | ND |
2014-06-10 | 5701-005-1100 | 2.31 ppb |
2014-07-29 | 5701-005-1230 | 11.4 ppb |
2014-08-12 | 5701-005-1002 | 12.4 ppb |
2014-08-25 | 5701-001-1040 | ND |
2014-08-25 | 5701-006-1055 | ND |
2014-08-25 | 5701-008-1025 | 9.76 ppb |
2014-09-09 | 5701-005-1540 | 4.55 ppb |
2014-09-09 | 5701-800-1457 | 6.17 ppb |
2014-09-09 | 5701-801-1450 | 7.16 ppb |
2014-10-14 | 5701-005-1445 | 3.41 ppb |
2014-10-14 | 5701-800-1402 | 4.24 ppb |
2014-10-14 | 5701-801-1353 | 5.77 ppb |
2014-11-18 | 5701-001-1124 | ND |
2014-11-18 | 5701-006-1130 | ND |
2014-11-25 | 5701-005-1555 | 3.35 ppb |
2014-11-25 | 5701-800-1338 | 4.91 ppb |
2014-11-25 | 5701-801-1326 | 4.62 ppb |
2014-12-16 | 5701-005-1250 | 4.00 ppb |
2014-12-16 | 5701-800-1219 | 4.05 ppb |
2014-12-16 | 5701-801-1227 | 3.74 ppb |
2015-01-13 | 5701-005-1132 | 5.73 ppb |
2015-01-13 | 5701-800-1106 | 3.14 ppb |
2015-01-13 | 5701-801-1058 | 2.94 ppb |
2015-01-20 | 5701-008-1108 | 3.52 ppb |
2015-02-10 | 5701-005-0830 | 2.21 ppb |
2015-02-10 | 5701-800-0829 | 2.32 ppb |
2015-02-10 | 5701-801-0829 | 2.87 ppb |
2015-02-17 | 5701-001-1116 | ND |
2015-02-17 | 5701-006-1128 | ND |
2015-03-10 | 5701-005-0925 | 2.15 ppb |
2015-03-10 | 5701-800-0927 | 2.55 ppb |
2015-03-10 | 5701-801-0928 | 2.43 ppb |
2015-04-07 | 5701-005-0849 | 6.26 ppb |
2015-04-07 | 5701-800-0848 | 5.38 ppb |
2015-04-07 | 5701-801-0848 | 5.49 ppb |
2015-05-13 | 5701-005-0933 | 7.83 ppb |
2015-05-13 | 5701-800-0909 | 12.1 ppb |
2015-05-13 | 5701-801-0931 | 9.75 ppb |
2015-05-19 | 5701-001-1028 | ND |
2015-05-19 | 5701-006-1021 | ND |
2015-06-09 | 5701-005-1022 | 9.60 ppb |
2015-06-09 | 5701-800-0953 | 11.2 ppb |
2015-06-09 | 5701-801-1008 | 11.5 ppb |
2015-07-14 | 5701-005-0850 | 9.63 ppb |
2015-07-14 | 5701-800-0849 | 16.5 ppb |
2015-07-14 | 5701-801-0850 | 13.5 ppb |
2015-08-18 | 5701-005-0836 | 6.67 ppb |
2015-08-18 | 5701-008-1055 | 7.91 ppb |
2015-08-18 | 5701-800-0834 | 13.5 ppb |
2015-08-18 | 5701-801-0837 | 11.8 ppb |
2015-09-15 | 5701-005-0843 | 7.84 ppb |
2015-09-15 | 5701-800-0841 | 13.2 ppb |
2015-09-15 | 5701-801-0842 | 10.1 ppb |
2015-10-13 | 5701-005-1016 | 5.94 ppb |
2015-10-13 | 5701-800-1014 | 7.35 ppb |
2015-10-13 | 5701-801-1015 | 7.87 ppb |
2015-11-09 | 5810-800-1338 | 7.80 ppb |
2015-11-09 | 5810-801-1328 | 6.00 ppb |
2015-12-15 | 5701-005-0800 | 3.32 ppb |
2015-12-15 | 5701-800-0759 | 3.96 ppb |
2015-12-15 | 5701-801-0759 | 3.85 ppb |
2016-01-06 | 5701-005-0910 | 4.35 ppb |
2016-01-06 | 5701-800-0911 | 2.10 ppb |
2016-01-06 | 5701-801-0911 | 4.19 ppb |
2016-01-19 | 5701-008-1500 | 1.93 ppb |
2016-02-09 | 5701-005-0905 | 4.32 ppb |
2016-02-09 | 5701-800-0905 | 3.67 ppb |
2016-02-09 | 5701-801-0905 | 3.22 ppb |
2016-03-08 | 5701-005-0911 | 3.08 ppb |
2016-03-08 | 5701-800-0910 | 3.70 ppb |
2016-03-08 | 5701-801-0911 | 3.64 ppb |
2016-04-12 | 5701-005-0858 | 21.5 ppb |
2016-04-12 | 5701-800-0857 | 9.01 ppb |
2016-04-12 | 5701-801-0857 | 9.19 ppb |
2016-05-10 | 5701-005-0916 | 14.8 ppb |
2016-05-10 | 5810-800-1106 | 22.0 ppb |
2016-05-10 | 5810-801-1056 | 22.0 ppb |
2016-05-24 | 5701-001-1244 | ND |
2016-05-24 | 5701-006-1238 | ND |
2016-06-14 | 5701-005-0819 | 6.98 ppb |
2016-06-14 | 5701-800-0818 | 21.7 ppb |
2016-06-14 | 5701-801-0819 | 30.7 ppb |
2016-07-12 | 5701-005-0827 | 13.3 ppb |
2016-07-12 | 5701-800-0825 | 24.0 ppb |
2016-07-12 | 5701-801-0826 | 22.4 ppb |
2016-08-03 | 9590-008-1045 | 14.0 ppb |
2016-08-09 | 5701-005-0937 | 11.8 ppb |
2016-08-09 | 5701-800-0938 | 18.5 ppb |
2016-08-09 | 5701-801-0939 | 15.5 ppb |
2016-09-13 | 5701-005-0837 | 5.48 ppb |
2016-09-13 | 5701-800-0835 | 10.5 ppb |
2016-09-13 | 5701-801-0836 | 3.18 ppb |
2016-10-18 | 5701-005-0936 | 4.13 ppb |
2016-10-18 | 5701-800-0935 | 7.02 ppb |
2016-10-18 | 5701-801-0936 | 2.96 ppb |
2016-11-15 | 5701-005-0848 | 6.70 ppb |
2016-11-15 | 5701-800-0848 | 4.61 ppb |
2016-11-15 | 5701-801-0849 | 6.50 ppb |
2016-12-13 | 5810-005-1113 | 8.40 ppb |
2016-12-13 | 5810-800-1200 | 5.80 ppb |
2016-12-13 | 5810-801-1140 | 4.60 ppb |
2017-01-17 | 5810-005-1258 | 6.30 ppb |
2017-01-17 | 5810-800-1352 | 5.60 ppb |
2017-01-17 | 5810-801-1337 | 5.70 ppb |
2017-01-24 | 5701-008-1506 | 7.87 ppb |
2017-02-14 | 5701-005-0945 | 8.30 ppb |
2017-02-14 | 5701-800-0942 | 12.9 ppb |
2017-02-14 | 5701-801-0943 | 12.4 ppb |
2017-03-14 | 5810-005-1005 | 11.0 ppb |
2017-03-14 | 5701-800-0827 | 15.7 ppb |
2017-03-14 | 5701-801-0828 | 8.42 ppb |
2017-04-03 | 5701-005-0817 | 9.12 ppb |
2017-04-03 | 5701-800-0817 | 10.9 ppb |
2017-04-03 | 5701-801-0818 | 6.86 ppb |
2017-05-02 | 5701-001-1245 | ND |
2017-05-02 | 5701-006-1241 | ND |
2017-05-09 | 5701-005-0955 | 6.29 ppb |
2017-05-09 | 5701-800-0953 | 15.5 ppb |
2017-05-09 | 5701-801-0954 | 10.00 ppb |
2017-06-13 | 5810-005-1246 | 12.0 ppb |
2017-06-13 | 5810-800-1157 | 19.0 ppb |
2017-06-13 | 5810-801-1210 | 13.0 ppb |
2017-07-11 | 5810-005-1024 | 6.80 ppb |
2017-07-11 | 5810-800-1143 | 16.0 ppb |
2017-07-11 | 5810-801-0956 | 12.0 ppb |
2017-08-08 | 5810-005-1025 | 9.70 ppb |
2017-08-08 | 5810-800-1118 | 20.0 ppb |
2017-08-08 | 5810-801-1058 | 16.0 ppb |
2017-08-22 | 5701-008-1525 | 9.36 ppb |
2017-09-12 | 5810-005-1452 | 11.0 ppb |
2017-09-12 | 5810-800-1411 | 13.0 ppb |
2017-09-12 | 5810-801-1353 | 14.0 ppb |
2017-10-10 | 5810-005-1500 | 9.90 ppb |
2017-10-10 | 5810-800-1331 | 12.0 ppb |
2017-10-10 | 5810-801-1317 | 14.0 ppb |
2017-11-13 | 5810-005-1303 | 10.00 ppb |
2017-11-13 | 5810-800-1358 | 17.0 ppb |
2017-11-13 | 5810-801-1419 | 14.0 ppb |
2017-12-12 | 5701-005-0850 | 9.25 ppb |
2017-12-12 | 5701-800-0850 | 9.00 ppb |
2017-12-12 | 5701-801-0850 | 7.54 ppb |
2018-01-09 | 5810-005-1120 | 18.0 ppb |
2018-01-09 | 5701-008-1108 | 2.71 ppb |
2018-01-09 | 5810-800-1228 | 14.0 ppb |
2018-01-09 | 5810-801-1202 | 12.0 ppb |
2018-02-13 | 5810-005-1107 | 18.0 ppb |
2018-02-13 | 5810-800-1319 | 29.0 ppb |
2018-02-13 | 5810-801-1259 | 27.0 ppb |
2018-03-01 | 5701-800-0804 | 17.2 ppb |
2018-03-01 | 5701-800-1545 | 14.0 ppb |
2018-03-01 | 5701-801-0806 | 13.4 ppb |
2018-03-01 | 5701-801-0807 | 2.70 ppb |
2018-03-13 | 5701-005-1246 | 16.5 ppb |
2018-03-13 | 5701-800-1248 | 21.4 ppb |
2018-03-13 | 5701-801-1248 | 20.7 ppb |
2018-04-10 | 5701-005-0814 | 17.1 ppb |
2018-04-10 | 5701-800-0813 | 20.9 ppb |
2018-04-10 | 5701-801-0813 | 13.5 ppb |
2018-05-15 | 5701-001-1052 | ND |
2018-05-15 | 5701-005-0940 | 13.9 ppb |
2018-05-15 | 5701-006-1038 | ND |
2018-05-15 | 5701-800-0941 | 18.4 ppb |
2018-05-15 | 5701-801-0941 | 15.7 ppb |
2018-06-12 | 5701-005-0829 | 12.3 ppb |
2018-06-12 | 5701-800-0828 | 22.6 ppb |
2018-06-12 | 5701-801-0828 | 14.7 ppb |
2018-07-17 | 5701-005-1538 | 16.3 ppb |
2018-07-17 | 5701-800-1505 | 16.0 ppb |
2018-07-17 | 5701-801-1518 | 18.7 ppb |
2018-08-14 | 5701-005-1004 | 14.2 ppb |
2018-08-14 | 5701-800-1004 | 19.9 ppb |
2018-08-14 | 5701-801-1004 | 21.3 ppb |
2018-08-21 | 5701-008-1337 | 4.16 ppb |
2018-09-18 | 5701-005-0830 | 5.21 ppb |
2018-09-18 | 5701-800-0829 | 16.6 ppb |
2018-09-18 | 5701-801-0830 | 13.1 ppb |
2018-10-02 | 5701-005-0910 | 5.87 ppb |
2018-10-02 | 5701-800-0909 | 9.99 ppb |
2018-10-02 | 5701-801-0910 | 11.2 ppb |
2018-10-30 | 5810-800-1538 | 1.20 ppb |
2018-10-30 | 5810-801-1519 | 3.20 ppb |
2018-11-13 | 5701-005-1005 | 3.20 ppb |
2018-11-13 | 5701-800-1006 | 5.58 ppb |
2018-11-13 | 5701-801-1006 | 3.31 ppb |
2018-12-11 | 5701-005-1350 | 13.3 ppb |
2018-12-11 | 5701-800-1351 | 7.19 ppb |
2018-12-11 | 5701-801-1351 | 6.76 ppb |
2019-01-08 | 5701-005-0813 | 14.4 ppb |
2019-01-08 | 5701-800-0814 | 10.9 ppb |
2019-01-08 | 5701-801-0814 | 10.9 ppb |
2019-01-22 | 5810-008-1125 | 8.50 ppb |
2019-02-12 | 5810-005-1109 | 9.40 ppb |
2019-02-12 | 5810-800-1229 | 12.0 ppb |
2019-02-12 | 5810-801-1208 | 12.0 ppb |
2019-03-12 | 5701-005-0907 | 19.8 ppb |
2019-03-12 | 5701-800-0908 | 17.7 ppb |
2019-03-12 | 5701-801-0908 | 24.9 ppb |
2019-04-09 | 5701-005-1518 | 10.2 ppb |
2019-04-09 | 5701-800-1014 | 27.8 ppb |
2019-04-09 | 5701-801-1001 | 10.6 ppb |
2019-05-14 | 5701-005-1012 | 8.96 ppb |
2019-05-14 | 5701-800-1011 | 23.9 ppb |
2019-05-14 | 5701-801-1011 | 23.8 ppb |
2019-06-10 | 5701-800-1018 | 22.8 ppb |
2019-06-10 | 5701-801-1018 | 21.9 ppb |
2019-06-11 | 5701-800-1018 | 15.0 ppb |
2019-06-11 | 5701-801-1400 | 16.0 ppb |
2019-06-25 | 5701-005-1146 | 8.56 ppb |
2019-06-25 | 5701-800-1157 | 10.2 ppb |
2019-06-25 | 5701-801-1130 | 9.86 ppb |
2019-07-16 | 5701-005-0959 | 13.5 ppb |
2019-07-16 | 5701-800-1207 | 15.7 ppb |
2019-07-16 | 5701-801-1153 | 13.2 ppb |
2019-08-13 | 5701-005-1252 | 11.3 ppb |
2019-08-13 | 5701-800-1319 | 15.7 ppb |
2019-08-13 | 5701-801-1339 | 14.2 ppb |
2019-08-20 | 5701-008-0839 | 13.5 ppb |
2019-09-17 | 5701-005-1232 | 9.79 ppb |
2019-09-17 | 5701-800-1253 | 18.9 ppb |
2019-09-17 | 5701-801-1304 | 11.1 ppb |
2019-10-15 | 5701-001-1500 | ND |
2019-10-15 | 5701-005-1510 | 10.5 ppb |
2019-10-15 | 5701-800-1354 | 8.30 ppb |
2019-10-15 | 5701-801-1339 | 11.5 ppb |
2019-11-12 | 5701-005-1226 | 12.9 ppb |
2019-11-12 | 5701-800-1355 | 14.1 ppb |
2019-11-12 | 5701-801-1408 | 11.2 ppb |
2019-12-10 | 5701-005-1455 | 16.2 ppb |
2019-12-10 | 5701-800-1445 | 9.25 ppb |
2019-12-10 | 5701-801-1431 | 8.60 ppb |