Bromoform
California Water Service Company - Hermosa / Redondo Beach
Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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 | 3.12 ppb | 34 | 32 | ND - 11.8 ppb |
2015 | 4.07 ppb | 34 | 32 | ND - 11.0 ppb |
2016 | 4.32 ppb | 34 | 32 | ND - 10.7 ppb |
2017 | 7.05 ppb | 33 | 32 | ND - 14.0 ppb |
2018 | 3.36 ppb | 36 | 28 | ND - 10.7 ppb |
2019 | 5.39 ppb | 34 | 33 | ND - 6.73 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.5 ppb
The EWG Health Guideline of 0.5 ppb for bromoform 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 | 4.33 ppb |
2014-03-04 | 5701-801-0918 | 2.88 ppb |
2014-03-04 | 5701-802-0907 | 2.51 ppb |
2014-03-04 | 5701-803-1417 | 3.39 ppb |
2014-03-04 | 5701-804-0846 | 3.93 ppb |
2014-03-04 | 5701-805-1501 | 3.25 ppb |
2014-03-04 | 5701-806-1033 | 2.87 ppb |
2014-03-04 | 5701-807-1426 | 2.31 ppb |
2014-06-03 | 5701-800-1238 | 2.68 ppb |
2014-06-03 | 5701-801-0944 | 2.62 ppb |
2014-06-03 | 5701-802-0933 | 2.24 ppb |
2014-06-03 | 5701-803-1435 | 4.91 ppb |
2014-06-03 | 5701-804-0910 | 2.29 ppb |
2014-06-03 | 5701-805-1523 | 2.62 ppb |
2014-06-03 | 5701-806-1049 | 2.38 ppb |
2014-06-03 | 5701-807-1445 | 11.8 ppb |
2014-06-25 | 5701-005-0925 | ND |
2014-09-02 | 5701-800-1300 | 2.47 ppb |
2014-09-02 | 5701-801-1025 | 2.04 ppb |
2014-09-02 | 5701-802-1010 | 2.04 ppb |
2014-09-02 | 5701-803-1500 | 6.78 ppb |
2014-09-02 | 5701-804-0940 | 1.96 ppb |
2014-09-02 | 5701-805-1525 | 2.07 ppb |
2014-09-02 | 5701-806-1130 | 1.97 ppb |
2014-09-02 | 5701-807-1445 | 8.46 ppb |
2014-09-03 | 5701-001-1450 | ND |
2014-12-02 | 5701-800-1332 | 4.01 ppb |
2014-12-02 | 5701-801-1048 | 2.24 ppb |
2014-12-02 | 5701-802-1034 | 2.45 ppb |
2014-12-02 | 5701-803-1424 | 3.41 ppb |
2014-12-02 | 5701-804-1010 | 1.98 ppb |
2014-12-02 | 5701-805-1017 | 2.47 ppb |
2014-12-02 | 5701-806-1338 | 2.40 ppb |
2014-12-02 | 5701-807-1320 | 2.36 ppb |
2015-03-03 | 5701-800-0655 | 4.88 ppb |
2015-03-03 | 5701-801-0655 | 4.51 ppb |
2015-03-03 | 5701-802-0655 | 4.22 ppb |
2015-03-03 | 5701-803-0655 | 3.97 ppb |
2015-03-03 | 5701-804-0655 | 4.70 ppb |
2015-03-03 | 5701-805-0655 | 3.93 ppb |
2015-03-03 | 5701-806-0655 | 4.69 ppb |
2015-03-03 | 5701-807-0655 | 3.39 ppb |
2015-06-02 | 5701-800-0653 | 3.85 ppb |
2015-06-02 | 5701-801-0653 | 3.29 ppb |
2015-06-02 | 5701-802-0653 | 3.08 ppb |
2015-06-02 | 5701-803-0653 | 3.32 ppb |
2015-06-02 | 5701-804-0653 | 3.25 ppb |
2015-06-02 | 5701-805-0653 | 3.63 ppb |
2015-06-02 | 5701-806-0653 | 3.17 ppb |
2015-06-02 | 5701-807-0653 | 7.79 ppb |
2015-06-17 | 5701-005-0950 | ND |
2015-08-26 | 5701-001-1210 | ND |
2015-09-08 | 5701-800-0813 | 2.97 ppb |
2015-09-08 | 5701-801-0813 | 2.06 ppb |
2015-09-08 | 5701-802-0813 | 2.91 ppb |
2015-09-08 | 5701-803-0813 | 4.18 ppb |
2015-09-08 | 5701-804-0813 | 2.32 ppb |
2015-09-08 | 5701-805-0813 | 3.27 ppb |
2015-09-08 | 5701-806-0813 | 2.86 ppb |
2015-09-08 | 5701-807-0813 | 8.85 ppb |
2015-12-08 | 5701-800-0810 | 6.31 ppb |
2015-12-08 | 5701-801-0810 | 4.72 ppb |
2015-12-08 | 5701-802-0810 | 4.78 ppb |
2015-12-08 | 5810-803-1454 | 3.30 ppb |
2015-12-08 | 5701-804-0810 | 4.22 ppb |
2015-12-08 | 5810-805-1534 | 5.30 ppb |
2015-12-08 | 5810-806-1125 | 3.60 ppb |
2015-12-08 | 5810-807-1504 | 11.0 ppb |
2016-03-08 | 5701-800-0920 | 10.7 ppb |
2016-03-08 | 5701-801-0920 | 6.85 ppb |
2016-03-08 | 5701-802-0920 | 8.00 ppb |
2016-03-08 | 5701-803-0920 | 3.26 ppb |
2016-03-08 | 5701-804-0920 | 4.95 ppb |
2016-03-08 | 5701-805-0920 | 9.27 ppb |
2016-03-08 | 5701-806-0920 | 3.05 ppb |
2016-03-08 | 5701-807-0920 | 3.17 ppb |
2016-06-07 | 5701-800-0919 | 3.73 ppb |
2016-06-07 | 5701-801-0919 | 2.92 ppb |
2016-06-07 | 5701-802-0919 | 2.53 ppb |
2016-06-07 | 5701-803-0919 | 3.44 ppb |
2016-06-07 | 5701-804-0919 | 2.83 ppb |
2016-06-07 | 5701-805-0919 | 2.88 ppb |
2016-06-07 | 5701-806-0919 | 3.07 ppb |
2016-06-07 | 5701-807-0919 | 3.30 ppb |
2016-06-21 | 5701-005-1300 | ND |
2016-08-17 | 9590-001-1010 | ND |
2016-09-06 | 5701-800-0635 | 3.34 ppb |
2016-09-06 | 5701-801-0635 | 3.36 ppb |
2016-09-06 | 5701-802-0635 | 3.35 ppb |
2016-09-06 | 5701-803-0635 | 2.93 ppb |
2016-09-06 | 5701-804-0635 | 3.38 ppb |
2016-09-06 | 5701-805-0635 | 3.14 ppb |
2016-09-06 | 5701-806-0635 | 2.95 ppb |
2016-09-06 | 5701-807-0635 | 2.97 ppb |
2016-12-06 | 5701-800-0838 | 7.76 ppb |
2016-12-06 | 5701-801-0838 | 4.20 ppb |
2016-12-06 | 5701-802-0838 | 4.41 ppb |
2016-12-06 | 5701-803-0838 | 6.95 ppb |
2016-12-06 | 5701-804-0838 | 2.95 ppb |
2016-12-06 | 5701-805-0838 | 9.39 ppb |
2016-12-06 | 5701-806-0838 | 4.42 ppb |
2016-12-06 | 5701-807-0838 | 7.31 ppb |
2017-03-07 | 5810-800-1346 | 13.0 ppb |
2017-03-07 | 5810-802-1025 | 8.70 ppb |
2017-03-07 | 5810-803-1529 | 12.0 ppb |
2017-03-07 | 5810-804-1004 | 7.00 ppb |
2017-03-07 | 5810-805-1552 | 14.0 ppb |
2017-03-07 | 5810-806-1147 | 9.20 ppb |
2017-03-07 | 5810-807-1600 | 13.0 ppb |
2017-03-08 | 5810-801-0000 | 9.20 ppb |
2017-06-06 | 5701-800-0911 | 6.23 ppb |
2017-06-06 | 5701-801-0911 | 5.73 ppb |
2017-06-06 | 5701-802-0911 | 5.19 ppb |
2017-06-06 | 5701-803-0911 | 10.1 ppb |
2017-06-06 | 5701-804-0911 | 4.64 ppb |
2017-06-06 | 5701-805-0911 | 9.67 ppb |
2017-06-06 | 5701-806-0911 | 3.56 ppb |
2017-06-06 | 5701-807-0911 | 10.9 ppb |
2017-06-21 | 5701-005-1330 | ND |
2017-09-05 | 5701-800-0858 | 6.43 ppb |
2017-09-05 | 5701-801-0858 | 5.03 ppb |
2017-09-05 | 5701-802-0858 | 6.61 ppb |
2017-09-05 | 5701-803-0858 | 5.41 ppb |
2017-09-05 | 5701-804-0858 | 3.90 ppb |
2017-09-05 | 5701-805-0858 | 8.02 ppb |
2017-09-05 | 5701-806-0858 | 6.82 ppb |
2017-09-05 | 5701-807-0858 | 7.30 ppb |
2017-12-06 | 5810-800-1020 | 5.50 ppb |
2017-12-06 | 5810-801-0950 | 6.00 ppb |
2017-12-06 | 5810-802-0940 | 5.70 ppb |
2017-12-06 | 5810-803-1120 | 5.30 ppb |
2017-12-06 | 5810-804-0920 | 4.30 ppb |
2017-12-06 | 5810-805-1155 | 4.70 ppb |
2017-12-06 | 5810-806-1005 | 4.40 ppb |
2017-12-06 | 5810-807-1135 | 5.10 ppb |
2018-01-16 | 5810-807-1436 | 3.80 ppb |
2018-03-06 | 5701-800-0848 | 8.54 ppb |
2018-03-06 | 5701-801-0848 | ND |
2018-03-06 | 5701-802-0848 | 10.5 ppb |
2018-03-06 | 5701-803-0848 | ND |
2018-03-06 | 5701-804-0848 | 10.7 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 | 2.45 ppb |
2018-06-05 | 5701-801-0814 | 2.19 ppb |
2018-06-05 | 5701-802-0814 | 1.96 ppb |
2018-06-05 | 5701-803-0814 | 3.32 ppb |
2018-06-05 | 5701-804-0814 | 2.36 ppb |
2018-06-05 | 5701-805-0814 | 2.43 ppb |
2018-06-05 | 5701-806-0814 | 2.18 ppb |
2018-06-05 | 5701-807-0814 | 5.50 ppb |
2018-06-21 | 5701-005-1015 | ND |
2018-07-27 | 9590-001-0935 | ND |
2018-09-04 | 5701-800-1238 | 2.93 ppb |
2018-09-04 | 5701-801-0953 | 3.05 ppb |
2018-09-04 | 5701-802-0944 | 3.36 ppb |
2018-09-04 | 5701-803-1440 | 3.96 ppb |
2018-09-04 | 5701-804-0913 | 3.06 ppb |
2018-09-04 | 5701-805-1524 | 4.07 ppb |
2018-09-04 | 5701-806-1058 | 3.04 ppb |
2018-09-04 | 5701-807-1448 | 4.11 ppb |
2018-12-04 | 5701-800-0709 | 5.21 ppb |
2018-12-04 | 5701-801-0709 | 4.28 ppb |
2018-12-04 | 5701-802-0709 | 4.58 ppb |
2018-12-04 | 5701-803-0709 | 4.61 ppb |
2018-12-04 | 5701-804-0709 | 4.25 ppb |
2018-12-04 | 5701-805-0709 | 5.41 ppb |
2018-12-04 | 5701-806-0709 | 4.42 ppb |
2018-12-04 | 5701-807-0709 | 4.73 ppb |
2018-12-20 | 9590-005-1245 | ND |
2019-03-05 | 5701-800-0906 | 4.75 ppb |
2019-03-05 | 5701-801-0906 | 5.12 ppb |
2019-03-05 | 5701-802-0906 | 4.44 ppb |
2019-03-05 | 5701-803-0906 | 5.45 ppb |
2019-03-05 | 5701-804-0906 | 5.47 ppb |
2019-03-05 | 5701-805-0906 | 5.21 ppb |
2019-03-05 | 5701-806-0906 | 5.38 ppb |
2019-03-05 | 5701-807-0906 | 5.51 ppb |
2019-06-04 | 5701-800-0929 | 5.98 ppb |
2019-06-04 | 5701-801-0929 | 6.14 ppb |
2019-06-04 | 5701-802-0929 | 6.05 ppb |
2019-06-04 | 5701-803-0929 | 6.12 ppb |
2019-06-04 | 5701-804-0929 | 6.17 ppb |
2019-06-04 | 5701-805-0929 | 6.60 ppb |
2019-06-04 | 5701-806-0929 | 6.45 ppb |
2019-06-04 | 5701-807-0929 | 6.73 ppb |
2019-09-03 | 5701-800-1223 | 4.29 ppb |
2019-09-03 | 5701-801-1032 | 4.57 ppb |
2019-09-03 | 5701-802-1021 | 4.39 ppb |
2019-09-03 | 5701-803-1431 | 5.95 ppb |
2019-09-03 | 5701-804-0958 | 4.06 ppb |
2019-09-03 | 5701-805-1536 | 5.59 ppb |
2019-09-03 | 5701-806-1137 | 4.60 ppb |
2019-09-03 | 5701-807-1448 | 5.93 ppb |
2019-12-03 | 5701-800-1131 | 6.69 ppb |
2019-12-03 | 5701-801-1000 | 6.15 ppb |
2019-12-03 | 5701-802-0951 | 6.45 ppb |
2019-12-03 | 5701-803-1319 | 5.79 ppb |
2019-12-03 | 5701-804-0929 | 6.48 ppb |
2019-12-03 | 5701-805-1409 | 6.66 ppb |
2019-12-03 | 5701-806-1042 | 6.69 ppb |
2019-12-03 | 5701-807-1342 | 6.08 ppb |
2019-12-26 | 9590-001-1300 | ND |
2019-12-27 | 9590-005-1105 | 1.20 ppb |