Bromodichloromethane
El Toro Water District
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 | 13.4 ppb | 32 | 32 | 9.24 ppb - 19.4 ppb |
2015 | 8.81 ppb | 32 | 32 | 3.26 ppb - 14.2 ppb |
2016 | 9.22 ppb | 32 | 32 | 5.26 ppb - 14.3 ppb |
2017 | 9.66 ppb | 32 | 32 | 1.98 ppb - 15.0 ppb |
2018 | 8.12 ppb | 35 | 35 | 6.12 ppb - 13.9 ppb |
2019 | 6.72 ppb | 33 | 33 | 3.73 ppb - 10.6 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 | 1805-801-1110 | 18.6 ppb |
2014-03-04 | 1805-802-0845 | 15.0 ppb |
2014-03-04 | 1805-803-1120 | 15.8 ppb |
2014-03-04 | 1805-804-1050 | 15.4 ppb |
2014-03-04 | 1805-805-0900 | 12.7 ppb |
2014-03-04 | 1805-806-1430 | 16.1 ppb |
2014-03-04 | 1805-807-0945 | 16.7 ppb |
2014-03-04 | 1805-808-1355 | 14.3 ppb |
2014-06-03 | 1805-801-1110 | 11.4 ppb |
2014-06-03 | 1805-802-0845 | 14.9 ppb |
2014-06-03 | 1805-803-1120 | 13.5 ppb |
2014-06-03 | 1805-804-1050 | 14.8 ppb |
2014-06-03 | 1805-805-0900 | 19.4 ppb |
2014-06-03 | 1805-806-1435 | 15.1 ppb |
2014-06-03 | 1805-807-0945 | 17.8 ppb |
2014-06-03 | 1805-808-1400 | 14.3 ppb |
2014-09-02 | 1805-801-1200 | 9.51 ppb |
2014-09-02 | 1805-802-0910 | 12.0 ppb |
2014-09-02 | 1805-803-1220 | 11.4 ppb |
2014-09-02 | 1805-804-1145 | 9.87 ppb |
2014-09-02 | 1805-805-0930 | 11.1 ppb |
2014-09-02 | 1805-806-1525 | 10.2 ppb |
2014-09-02 | 1805-807-1020 | 12.0 ppb |
2014-09-02 | 1805-808-1445 | 9.24 ppb |
2014-12-10 | 1805-801-1115 | 15.6 ppb |
2014-12-10 | 1805-802-0905 | 10.2 ppb |
2014-12-10 | 1805-803-1130 | 13.6 ppb |
2014-12-10 | 1805-804-1100 | 15.0 ppb |
2014-12-10 | 1805-805-0925 | 11.2 ppb |
2014-12-10 | 1805-806-1450 | 9.72 ppb |
2014-12-10 | 1805-807-1000 | 10.8 ppb |
2014-12-10 | 1805-808-1415 | 10.3 ppb |
2015-03-03 | 1805-801-1205 | 10.8 ppb |
2015-03-03 | 1805-802-0910 | 7.20 ppb |
2015-03-03 | 1805-803-1220 | 9.26 ppb |
2015-03-03 | 1805-804-1145 | 13.1 ppb |
2015-03-03 | 1805-805-0930 | 7.97 ppb |
2015-03-03 | 1805-806-1540 | 8.68 ppb |
2015-03-03 | 1805-807-1010 | 8.83 ppb |
2015-03-03 | 1805-808-1505 | 8.47 ppb |
2015-06-03 | 1805-801-1145 | 14.2 ppb |
2015-06-04 | 1805-802-0915 | 9.51 ppb |
2015-06-04 | 1805-803-1200 | 14.0 ppb |
2015-06-04 | 1805-804-1125 | 10.7 ppb |
2015-06-04 | 1805-805-0935 | 9.03 ppb |
2015-06-04 | 1805-806-1450 | 9.01 ppb |
2015-06-04 | 1805-807-1025 | 7.84 ppb |
2015-06-04 | 1805-808-1420 | 8.95 ppb |
2015-09-02 | 1805-801-1150 | 9.02 ppb |
2015-09-02 | 1805-802-0910 | 10.2 ppb |
2015-09-02 | 1805-803-1205 | 9.29 ppb |
2015-09-02 | 1805-804-1130 | 11.8 ppb |
2015-09-02 | 1805-805-0935 | 10.6 ppb |
2015-09-02 | 1805-806-1455 | 10.4 ppb |
2015-09-02 | 1805-807-1020 | 11.0 ppb |
2015-09-02 | 1805-808-1425 | 12.3 ppb |
2015-12-07 | 1805-801-1330 | 7.58 ppb |
2015-12-07 | 1805-802-0920 | 3.64 ppb |
2015-12-07 | 1805-803-1400 | 7.12 ppb |
2015-12-07 | 1805-804-1255 | 7.86 ppb |
2015-12-07 | 1805-805-0715 | 3.51 ppb |
2015-12-07 | 1805-806-1200 | 3.36 ppb |
2015-12-07 | 1805-807-0800 | 3.58 ppb |
2015-12-07 | 1805-808-1040 | 3.26 ppb |
2016-03-07 | 1805-801-1400 | 8.80 ppb |
2016-03-09 | 1805-802-1000 | 6.72 ppb |
2016-03-09 | 1805-803-1300 | 11.2 ppb |
2016-03-09 | 1805-804-1335 | 11.0 ppb |
2016-03-09 | 1805-805-0700 | 6.24 ppb |
2016-03-09 | 1805-806-1145 | 8.02 ppb |
2016-03-09 | 1805-807-0840 | 6.95 ppb |
2016-03-09 | 1805-808-1030 | 8.47 ppb |
2016-06-06 | 1805-801-1530 | 10.8 ppb |
2016-06-06 | 1805-802-1240 | 12.2 ppb |
2016-06-06 | 1805-803-1445 | 12.3 ppb |
2016-06-06 | 1805-804-1500 | 14.3 ppb |
2016-06-06 | 1805-805-0720 | 11.9 ppb |
2016-06-06 | 1805-806-1400 | 10.6 ppb |
2016-06-06 | 1805-807-1100 | 8.55 ppb |
2016-06-06 | 1805-808-1325 | 5.78 ppb |
2016-09-06 | 1805-801-1520 | 13.6 ppb |
2016-09-06 | 1805-802-1255 | 11.7 ppb |
2016-09-06 | 1805-803-0800 | 13.6 ppb |
2016-09-06 | 1805-804-1515 | 12.4 ppb |
2016-09-06 | 1805-805-0745 | 8.88 ppb |
2016-09-06 | 1805-806-1400 | 8.88 ppb |
2016-09-06 | 1805-807-0900 | 11.5 ppb |
2016-09-06 | 1805-808-1200 | 9.84 ppb |
2016-12-05 | 1805-801-1430 | 7.00 ppb |
2016-12-05 | 1805-802-1030 | 5.36 ppb |
2016-12-05 | 1805-803-0810 | 8.42 ppb |
2016-12-05 | 1805-804-1400 | 7.37 ppb |
2016-12-05 | 1805-805-1200 | 5.98 ppb |
2016-12-05 | 1805-806-1220 | 5.37 ppb |
2016-12-05 | 1805-807-0820 | 5.26 ppb |
2016-12-05 | 1805-808-1115 | 6.15 ppb |
2017-03-06 | 1805-801-1400 | 11.5 ppb |
2017-03-06 | 1805-802-1000 | 9.92 ppb |
2017-03-06 | 1805-803-1420 | 9.50 ppb |
2017-03-06 | 1805-804-1320 | 11.4 ppb |
2017-03-06 | 1805-805-0710 | 10.2 ppb |
2017-03-06 | 1805-806-1200 | 12.1 ppb |
2017-03-06 | 1805-807-0740 | 11.1 ppb |
2017-03-06 | 1805-808-1040 | 12.7 ppb |
2017-06-05 | 1805-801-1305 | 6.58 ppb |
2017-06-05 | 1805-802-0915 | 7.82 ppb |
2017-06-05 | 1805-803-1330 | 7.79 ppb |
2017-06-05 | 1805-804-1250 | 13.3 ppb |
2017-06-05 | 1805-805-0715 | 8.14 ppb |
2017-06-05 | 1805-806-1205 | 8.40 ppb |
2017-06-05 | 1805-807-0745 | 8.18 ppb |
2017-06-05 | 1805-808-1015 | 8.89 ppb |
2017-09-05 | 1805-801-1225 | 9.40 ppb |
2017-09-05 | 1805-802-0905 | 13.8 ppb |
2017-09-05 | 1805-803-1245 | 9.65 ppb |
2017-09-05 | 1805-804-1200 | 11.0 ppb |
2017-09-05 | 1805-805-1215 | 9.50 ppb |
2017-09-05 | 1805-806-1050 | 10.7 ppb |
2017-09-05 | 1805-807-0740 | 8.27 ppb |
2017-09-05 | 1805-808-0920 | 9.42 ppb |
2017-12-04 | 1805-801-1430 | 11.1 ppb |
2017-12-04 | 1805-802-1100 | 9.35 ppb |
2017-12-04 | 1805-803-0920 | 11.2 ppb |
2017-12-04 | 1805-804-1330 | 15.0 ppb |
2017-12-04 | 1805-805-0810 | 1.98 ppb |
2017-12-04 | 1805-806-1215 | 7.44 ppb |
2017-12-04 | 1805-807-0830 | 7.68 ppb |
2017-12-04 | 1805-808-1130 | 5.98 ppb |
2018-03-05 | 1805-801-0850 | 6.84 ppb |
2018-03-06 | 1805-802-1315 | 13.9 ppb |
2018-03-06 | 1805-803-0805 | 7.07 ppb |
2018-03-06 | 1805-804-0815 | 7.10 ppb |
2018-03-06 | 1805-805-1120 | 8.65 ppb |
2018-03-06 | 1805-806-1120 | 8.65 ppb |
2018-03-06 | 1805-806-1210 | 7.73 ppb |
2018-03-06 | 1805-807-1210 | 7.73 ppb |
2018-03-06 | 1805-807-1340 | 7.64 ppb |
2018-03-06 | 1805-808-1340 | 7.64 ppb |
2018-03-21 | 1805-805-1030 | 7.63 ppb |
2018-06-04 | 1805-801-0945 | 10.1 ppb |
2018-06-04 | 1805-802-1420 | 11.1 ppb |
2018-06-04 | 1805-803-0905 | 8.85 ppb |
2018-06-04 | 1805-804-0920 | 8.42 ppb |
2018-06-04 | 1805-805-0810 | 7.86 ppb |
2018-06-04 | 1805-806-1155 | 8.85 ppb |
2018-06-04 | 1805-807-1245 | 8.43 ppb |
2018-06-04 | 1805-808-1435 | 8.70 ppb |
2018-09-04 | 1805-801-1105 | 6.32 ppb |
2018-09-04 | 1805-802-1415 | 8.87 ppb |
2018-09-04 | 1805-803-0915 | 7.43 ppb |
2018-09-04 | 1805-804-1045 | 9.66 ppb |
2018-09-04 | 1805-805-0900 | 6.68 ppb |
2018-09-04 | 1805-806-1150 | 6.15 ppb |
2018-09-04 | 1805-807-1300 | 6.71 ppb |
2018-09-04 | 1805-808-1435 | 6.65 ppb |
2018-12-03 | 1805-801-1205 | 8.26 ppb |
2018-12-03 | 1805-802-1420 | 6.12 ppb |
2018-12-03 | 1805-803-0955 | 8.26 ppb |
2018-12-03 | 1805-804-1145 | 7.55 ppb |
2018-12-03 | 1805-805-0900 | 9.40 ppb |
2018-12-03 | 1805-806-1240 | 7.85 ppb |
2018-12-03 | 1805-807-1315 | 7.97 ppb |
2018-12-03 | 1805-808-1440 | 7.38 ppb |
2019-03-04 | 1805-801-0935 | 6.54 ppb |
2019-03-04 | 1805-802-1340 | 6.63 ppb |
2019-03-04 | 1805-803-0855 | 6.86 ppb |
2019-03-04 | 1805-804-0910 | 7.38 ppb |
2019-03-04 | 1805-805-0700 | 8.12 ppb |
2019-03-04 | 1805-806-1125 | 6.86 ppb |
2019-03-04 | 1805-807-1210 | 8.41 ppb |
2019-03-04 | 1805-808-1355 | 7.41 ppb |
2019-06-03 | 1805-801-0915 | 7.37 ppb |
2019-06-03 | 1805-802-1545 | 3.85 ppb |
2019-06-03 | 1805-803-1230 | 7.34 ppb |
2019-06-03 | 1805-804-0845 | 8.13 ppb |
2019-06-03 | 1805-805-0710 | 5.21 ppb |
2019-06-03 | 1805-806-1000 | 5.22 ppb |
2019-06-03 | 1805-807-1100 | 5.82 ppb |
2019-06-03 | 1805-808-1500 | 5.17 ppb |
2019-09-03 | 1805-801-0840 | 6.73 ppb |
2019-09-03 | 1805-802-1345 | 10.6 ppb |
2019-09-03 | 1805-803-1155 | 8.65 ppb |
2019-09-03 | 1805-804-0815 | 7.55 ppb |
2019-09-03 | 1805-805-1015 | 7.89 ppb |
2019-09-03 | 1805-806-0920 | 7.19 ppb |
2019-09-03 | 1805-807-1215 | 7.62 ppb |
2019-09-03 | 1805-808-1405 | 8.50 ppb |
2019-12-02 | 1805-801-0850 | 7.84 ppb |
2019-12-02 | 1805-802-1320 | 5.47 ppb |
2019-12-02 | 1805-803-0825 | 7.64 ppb |
2019-12-02 | 1805-804-0745 | 8.68 ppb |
2019-12-02 | 1805-805-0805 | 5.32 ppb |
2019-12-02 | 1805-806-0935 | 3.73 ppb |
2019-12-02 | 1805-807-1210 | 4.18 ppb |
2019-12-02 | 1805-808-1345 | 3.96 ppb |
2019-12-03 | 1805-808-1345 | 3.96 ppb |