Bromodichloromethane
California Water Service Company - Hermosa / Redondo Beach
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.
205
Samples
0
Samples exceeding legal limit (MCL)
189
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 8.49 ppb | 34 | 32 | ND - 11.7 ppb |
| 2015 | 8.94 ppb | 34 | 32 | ND - 12.9 ppb |
| 2016 | 8.28 ppb | 34 | 32 | ND - 13.3 ppb |
| 2017 | 9.25 ppb | 33 | 32 | ND - 30.0 ppb |
| 2018 | 5.30 ppb | 36 | 28 | ND - 10.1 ppb |
| 2019 | 5.58 ppb | 34 | 33 | ND - 11.3 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 |
|---|---|---|
| 2014-03-04 | 5701-800-1151 | 10.5 ppb |
| 2014-03-04 | 5701-801-0918 | 9.08 ppb |
| 2014-03-04 | 5701-802-0907 | 9.77 ppb |
| 2014-03-04 | 5701-803-1417 | 7.07 ppb |
| 2014-03-04 | 5701-804-0846 | 7.75 ppb |
| 2014-03-04 | 5701-805-1501 | 10.1 ppb |
| 2014-03-04 | 5701-806-1033 | 9.25 ppb |
| 2014-03-04 | 5701-807-1426 | 9.35 ppb |
| 2014-06-03 | 5701-800-1238 | 10.6 ppb |
| 2014-06-03 | 5701-801-0944 | 11.6 ppb |
| 2014-06-03 | 5701-802-0933 | 9.96 ppb |
| 2014-06-03 | 5701-803-1435 | 3.96 ppb |
| 2014-06-03 | 5701-804-0910 | 9.98 ppb |
| 2014-06-03 | 5701-805-1523 | 10.5 ppb |
| 2014-06-03 | 5701-806-1049 | 10.2 ppb |
| 2014-06-03 | 5701-807-1445 | 2.55 ppb |
| 2014-06-25 | 5701-005-0925 | ND |
| 2014-09-02 | 5701-800-1300 | 11.4 ppb |
| 2014-09-02 | 5701-801-1025 | 11.6 ppb |
| 2014-09-02 | 5701-802-1010 | 11.5 ppb |
| 2014-09-02 | 5701-803-1500 | 3.58 ppb |
| 2014-09-02 | 5701-804-0940 | 11.5 ppb |
| 2014-09-02 | 5701-805-1525 | 11.1 ppb |
| 2014-09-02 | 5701-806-1130 | 11.7 ppb |
| 2014-09-02 | 5701-807-1445 | 2.54 ppb |
| 2014-09-03 | 5701-001-1450 | ND |
| 2014-12-02 | 5701-800-1332 | 10.7 ppb |
| 2014-12-02 | 5701-801-1048 | 9.18 ppb |
| 2014-12-02 | 5701-802-1034 | 9.50 ppb |
| 2014-12-02 | 5701-803-1424 | 6.42 ppb |
| 2014-12-02 | 5701-804-1010 | 9.08 ppb |
| 2014-12-02 | 5701-805-1017 | 8.21 ppb |
| 2014-12-02 | 5701-806-1338 | 9.87 ppb |
| 2014-12-02 | 5701-807-1320 | 8.56 ppb |
| 2015-03-03 | 5701-800-0655 | 10.3 ppb |
| 2015-03-03 | 5701-801-0655 | 10.2 ppb |
| 2015-03-03 | 5701-802-0655 | 9.97 ppb |
| 2015-03-03 | 5701-803-0655 | 6.60 ppb |
| 2015-03-03 | 5701-804-0655 | 9.73 ppb |
| 2015-03-03 | 5701-805-0655 | 9.82 ppb |
| 2015-03-03 | 5701-806-0655 | 10.4 ppb |
| 2015-03-03 | 5701-807-0655 | 9.09 ppb |
| 2015-06-02 | 5701-800-0653 | 10.9 ppb |
| 2015-06-02 | 5701-801-0653 | 11.0 ppb |
| 2015-06-02 | 5701-802-0653 | 10.4 ppb |
| 2015-06-02 | 5701-803-0653 | 9.63 ppb |
| 2015-06-02 | 5701-804-0653 | 10.9 ppb |
| 2015-06-02 | 5701-805-0653 | 10.7 ppb |
| 2015-06-02 | 5701-806-0653 | 10.7 ppb |
| 2015-06-02 | 5701-807-0653 | 3.24 ppb |
| 2015-06-17 | 5701-005-0950 | ND |
| 2015-08-26 | 5701-001-1210 | ND |
| 2015-09-08 | 5701-800-0813 | 11.6 ppb |
| 2015-09-08 | 5701-801-0813 | 10.4 ppb |
| 2015-09-08 | 5701-802-0813 | 12.1 ppb |
| 2015-09-08 | 5701-803-0813 | 8.89 ppb |
| 2015-09-08 | 5701-804-0813 | 11.5 ppb |
| 2015-09-08 | 5701-805-0813 | 12.7 ppb |
| 2015-09-08 | 5701-806-0813 | 12.9 ppb |
| 2015-09-08 | 5701-807-0813 | 2.33 ppb |
| 2015-12-08 | 5701-800-0810 | 10.2 ppb |
| 2015-12-08 | 5701-801-0810 | 9.27 ppb |
| 2015-12-08 | 5701-802-0810 | 9.61 ppb |
| 2015-12-08 | 5810-803-1454 | 8.40 ppb |
| 2015-12-08 | 5701-804-0810 | 8.28 ppb |
| 2015-12-08 | 5810-805-1534 | 9.90 ppb |
| 2015-12-08 | 5810-806-1125 | 9.10 ppb |
| 2015-12-08 | 5810-807-1504 | 3.20 ppb |
| 2016-03-08 | 5701-800-0920 | 7.01 ppb |
| 2016-03-08 | 5701-801-0920 | 6.29 ppb |
| 2016-03-08 | 5701-802-0920 | 7.62 ppb |
| 2016-03-08 | 5701-803-0920 | 4.33 ppb |
| 2016-03-08 | 5701-804-0920 | 5.27 ppb |
| 2016-03-08 | 5701-805-0920 | 5.79 ppb |
| 2016-03-08 | 5701-806-0920 | 5.28 ppb |
| 2016-03-08 | 5701-807-0920 | 5.03 ppb |
| 2016-06-07 | 5701-800-0919 | 10.1 ppb |
| 2016-06-07 | 5701-801-0919 | 10.9 ppb |
| 2016-06-07 | 5701-802-0919 | 10.00 ppb |
| 2016-06-07 | 5701-803-0919 | 7.21 ppb |
| 2016-06-07 | 5701-804-0919 | 10.7 ppb |
| 2016-06-07 | 5701-805-0919 | 9.90 ppb |
| 2016-06-07 | 5701-806-0919 | 11.2 ppb |
| 2016-06-07 | 5701-807-0919 | 8.00 ppb |
| 2016-06-21 | 5701-005-1300 | ND |
| 2016-08-17 | 9590-001-1010 | ND |
| 2016-09-06 | 5701-800-0635 | 11.8 ppb |
| 2016-09-06 | 5701-801-0635 | 11.6 ppb |
| 2016-09-06 | 5701-802-0635 | 12.6 ppb |
| 2016-09-06 | 5701-803-0635 | 8.64 ppb |
| 2016-09-06 | 5701-804-0635 | 12.0 ppb |
| 2016-09-06 | 5701-805-0635 | 13.3 ppb |
| 2016-09-06 | 5701-806-0635 | 12.3 ppb |
| 2016-09-06 | 5701-807-0635 | 11.7 ppb |
| 2016-12-06 | 5701-800-0838 | 9.64 ppb |
| 2016-12-06 | 5701-801-0838 | 8.76 ppb |
| 2016-12-06 | 5701-802-0838 | 8.39 ppb |
| 2016-12-06 | 5701-803-0838 | 4.12 ppb |
| 2016-12-06 | 5701-804-0838 | 8.72 ppb |
| 2016-12-06 | 5701-805-0838 | 9.02 ppb |
| 2016-12-06 | 5701-806-0838 | 9.73 ppb |
| 2016-12-06 | 5701-807-0838 | 4.67 ppb |
| 2017-03-07 | 5810-800-1346 | 13.0 ppb |
| 2017-03-07 | 5810-802-1025 | 15.0 ppb |
| 2017-03-07 | 5810-803-1529 | 5.60 ppb |
| 2017-03-07 | 5810-804-1004 | 16.0 ppb |
| 2017-03-07 | 5810-805-1552 | 12.0 ppb |
| 2017-03-07 | 5810-806-1147 | 14.0 ppb |
| 2017-03-07 | 5810-807-1600 | 6.30 ppb |
| 2017-03-08 | 5810-801-0000 | 15.0 ppb |
| 2017-06-06 | 5701-800-0911 | 6.61 ppb |
| 2017-06-06 | 5701-801-0911 | 6.91 ppb |
| 2017-06-06 | 5701-802-0911 | 6.36 ppb |
| 2017-06-06 | 5701-803-0911 | 2.57 ppb |
| 2017-06-06 | 5701-804-0911 | 6.89 ppb |
| 2017-06-06 | 5701-805-0911 | 5.37 ppb |
| 2017-06-06 | 5701-806-0911 | 8.71 ppb |
| 2017-06-06 | 5701-807-0911 | 2.80 ppb |
| 2017-06-21 | 5701-005-1330 | ND |
| 2017-09-05 | 5701-800-0858 | 9.07 ppb |
| 2017-09-05 | 5701-801-0858 | 9.45 ppb |
| 2017-09-05 | 5701-802-0858 | 7.29 ppb |
| 2017-09-05 | 5701-803-0858 | 5.35 ppb |
| 2017-09-05 | 5701-804-0858 | 12.3 ppb |
| 2017-09-05 | 5701-805-0858 | 9.10 ppb |
| 2017-09-05 | 5701-806-0858 | 11.6 ppb |
| 2017-09-05 | 5701-807-0858 | 5.28 ppb |
| 2017-12-06 | 5810-800-1020 | 8.60 ppb |
| 2017-12-06 | 5810-801-0950 | 8.40 ppb |
| 2017-12-06 | 5810-802-0940 | 7.70 ppb |
| 2017-12-06 | 5810-803-1120 | 12.0 ppb |
| 2017-12-06 | 5810-804-0920 | 7.00 ppb |
| 2017-12-06 | 5810-805-1155 | 13.0 ppb |
| 2017-12-06 | 5810-806-1005 | 6.00 ppb |
| 2017-12-06 | 5810-807-1135 | 30.0 ppb |
| 2018-01-16 | 5810-807-1436 | 4.20 ppb |
| 2018-03-06 | 5701-800-0848 | 6.94 ppb |
| 2018-03-06 | 5701-801-0848 | ND |
| 2018-03-06 | 5701-802-0848 | 9.38 ppb |
| 2018-03-06 | 5701-803-0848 | ND |
| 2018-03-06 | 5701-804-0848 | 9.72 ppb |
| 2018-03-06 | 5701-805-0848 | ND |
| 2018-03-06 | 5701-806-0848 | ND |
| 2018-03-06 | 5701-807-0848 | ND |
| 2018-06-05 | 5701-800-0814 | 6.92 ppb |
| 2018-06-05 | 5701-801-0814 | 6.47 ppb |
| 2018-06-05 | 5701-802-0814 | 5.90 ppb |
| 2018-06-05 | 5701-803-0814 | 3.84 ppb |
| 2018-06-05 | 5701-804-0814 | 6.37 ppb |
| 2018-06-05 | 5701-805-0814 | 6.46 ppb |
| 2018-06-05 | 5701-806-0814 | 6.29 ppb |
| 2018-06-05 | 5701-807-0814 | 4.51 ppb |
| 2018-06-21 | 5701-005-1015 | ND |
| 2018-07-27 | 9590-001-0935 | ND |
| 2018-09-04 | 5701-800-1238 | 8.38 ppb |
| 2018-09-04 | 5701-801-0953 | 9.28 ppb |
| 2018-09-04 | 5701-802-0944 | 10.1 ppb |
| 2018-09-04 | 5701-803-1440 | 4.94 ppb |
| 2018-09-04 | 5701-804-0913 | 8.09 ppb |
| 2018-09-04 | 5701-805-1524 | 7.84 ppb |
| 2018-09-04 | 5701-806-1058 | 8.51 ppb |
| 2018-09-04 | 5701-807-1448 | 8.28 ppb |
| 2018-12-04 | 5701-800-0709 | 6.92 ppb |
| 2018-12-04 | 5701-801-0709 | 7.16 ppb |
| 2018-12-04 | 5701-802-0709 | 6.64 ppb |
| 2018-12-04 | 5701-803-0709 | 4.35 ppb |
| 2018-12-04 | 5701-804-0709 | 7.17 ppb |
| 2018-12-04 | 5701-805-0709 | 5.44 ppb |
| 2018-12-04 | 5701-806-0709 | 6.62 ppb |
| 2018-12-04 | 5701-807-0709 | 4.05 ppb |
| 2018-12-20 | 9590-005-1245 | ND |
| 2019-03-05 | 5701-800-0906 | 7.66 ppb |
| 2019-03-05 | 5701-801-0906 | 8.07 ppb |
| 2019-03-05 | 5701-802-0906 | 8.11 ppb |
| 2019-03-05 | 5701-803-0906 | 6.05 ppb |
| 2019-03-05 | 5701-804-0906 | 8.13 ppb |
| 2019-03-05 | 5701-805-0906 | 7.34 ppb |
| 2019-03-05 | 5701-806-0906 | 8.40 ppb |
| 2019-03-05 | 5701-807-0906 | 7.41 ppb |
| 2019-06-04 | 5701-800-0929 | 4.93 ppb |
| 2019-06-04 | 5701-801-0929 | 11.2 ppb |
| 2019-06-04 | 5701-802-0929 | 11.3 ppb |
| 2019-06-04 | 5701-803-0929 | 4.89 ppb |
| 2019-06-04 | 5701-804-0929 | 9.70 ppb |
| 2019-06-04 | 5701-805-0929 | 5.25 ppb |
| 2019-06-04 | 5701-806-0929 | 9.27 ppb |
| 2019-06-04 | 5701-807-0929 | 5.50 ppb |
| 2019-09-03 | 5701-800-1223 | 4.81 ppb |
| 2019-09-03 | 5701-801-1032 | 5.18 ppb |
| 2019-09-03 | 5701-802-1021 | 5.19 ppb |
| 2019-09-03 | 5701-803-1431 | 2.35 ppb |
| 2019-09-03 | 5701-804-0958 | 4.80 ppb |
| 2019-09-03 | 5701-805-1536 | 4.30 ppb |
| 2019-09-03 | 5701-806-1137 | 5.51 ppb |
| 2019-09-03 | 5701-807-1448 | 2.24 ppb |
| 2019-12-03 | 5701-800-1131 | 4.85 ppb |
| 2019-12-03 | 5701-801-1000 | 3.77 ppb |
| 2019-12-03 | 5701-802-0951 | 4.15 ppb |
| 2019-12-03 | 5701-803-1319 | 2.99 ppb |
| 2019-12-03 | 5701-804-0929 | 3.54 ppb |
| 2019-12-03 | 5701-805-1409 | 4.28 ppb |
| 2019-12-03 | 5701-806-1042 | 4.17 ppb |
| 2019-12-03 | 5701-807-1342 | 3.20 ppb |
| 2019-12-26 | 9590-001-1300 | ND |
| 2019-12-27 | 9590-005-1105 | 1.10 ppb |