Bromodichloromethane
California Water Service (CWS) - King City
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.
100
Samples
0
Samples exceeding legal limit (MCL)
88
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 1.61 ppb | 18 | 16 | ND - 6.71 ppb |
| 2015 | 1.70 ppb | 17 | 16 | ND - 6.13 ppb |
| 2016 | 1.39 ppb | 20 | 17 | ND - 4.44 ppb |
| 2017 | 1.64 ppb | 17 | 15 | ND - 4.80 ppb |
| 2018 | 2.34 ppb | 17 | 17 | 0.690 ppb - 5.69 ppb |
| 2019 | 1.17 ppb | 11 | 7 | ND - 3.50 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 |
|---|---|---|
| 2014-02-11 | 5701-801-1350 | 1.64 ppb |
| 2014-02-11 | 5701-803-1329 | 1.34 ppb |
| 2014-02-11 | 5701-802-1315 | 0.860 ppb |
| 2014-02-13 | 5701-804-1413 | 0.950 ppb |
| 2014-05-14 | 5701-804-0822 | 0.780 ppb |
| 2014-05-14 | 5701-803-1132 | 1.22 ppb |
| 2014-05-14 | 5701-801-1118 | 3.56 ppb |
| 2014-05-14 | 5701-802-1230 | 0.810 ppb |
| 2014-08-12 | 5701-804-1145 | 0.830 ppb |
| 2014-08-12 | 5701-803-1210 | 1.62 ppb |
| 2014-08-12 | 5701-802-1055 | 0.830 ppb |
| 2014-08-12 | 5701-801-1135 | 6.71 ppb |
| 2014-08-26 | 5701-014-1220 | ND |
| 2014-08-26 | 5701-015-1409 | ND |
| 2014-11-12 | 5701-804-1100 | 1.15 ppb |
| 2014-11-12 | 5701-801-1040 | 4.21 ppb |
| 2014-11-12 | 5701-802-0920 | 0.700 ppb |
| 2014-11-12 | 5701-803-0955 | 1.73 ppb |
| 2015-02-09 | 5701-801-0712 | 2.75 ppb |
| 2015-02-09 | 5701-802-0712 | 0.850 ppb |
| 2015-02-09 | 5701-804-0712 | 1.64 ppb |
| 2015-02-09 | 5701-803-0712 | 1.38 ppb |
| 2015-05-12 | 5701-801-0803 | 2.78 ppb |
| 2015-05-12 | 5701-802-0803 | 1.04 ppb |
| 2015-05-12 | 5701-804-0803 | 0.880 ppb |
| 2015-05-12 | 5701-803-0803 | 1.49 ppb |
| 2015-06-11 | 5701-008-1130 | ND |
| 2015-08-11 | 5701-802-0653 | 0.780 ppb |
| 2015-08-11 | 5701-801-0653 | 6.13 ppb |
| 2015-08-11 | 5701-803-0653 | 1.46 ppb |
| 2015-08-11 | 5701-804-0653 | 1.13 ppb |
| 2015-11-09 | 5701-804-0859 | 0.850 ppb |
| 2015-11-09 | 5701-803-0859 | 1.43 ppb |
| 2015-11-09 | 5701-801-0859 | 3.46 ppb |
| 2015-11-09 | 5701-802-0859 | 0.830 ppb |
| 2016-02-09 | 5701-802-0926 | 0.790 ppb |
| 2016-02-09 | 5701-803-0926 | 1.24 ppb |
| 2016-02-09 | 5701-801-0926 | 3.34 ppb |
| 2016-02-09 | 5701-804-0926 | 1.57 ppb |
| 2016-03-16 | 5701-006-1400 | 0.690 ppb |
| 2016-03-16 | 5701-012-1100 | ND |
| 2016-05-09 | 5701-802-0746 | 1.06 ppb |
| 2016-05-09 | 5701-803-0746 | 1.53 ppb |
| 2016-05-09 | 5701-801-0746 | 3.26 ppb |
| 2016-05-09 | 5701-804-0746 | 1.08 ppb |
| 2016-06-20 | 5701-014-1317 | ND |
| 2016-08-08 | 5701-804-0722 | 0.900 ppb |
| 2016-08-08 | 5701-802-0722 | 0.890 ppb |
| 2016-08-08 | 5701-803-0722 | 1.59 ppb |
| 2016-08-08 | 5701-801-0722 | 4.44 ppb |
| 2016-09-19 | 5701-007-1054 | ND |
| 2016-11-16 | 5701-804-0745 | 0.990 ppb |
| 2016-11-16 | 5701-802-0745 | 1.26 ppb |
| 2016-11-16 | 5701-803-0745 | 1.37 ppb |
| 2016-11-16 | 5701-801-0745 | 1.82 ppb |
| 2017-02-14 | 5810-803-1311 | 1.60 ppb |
| 2017-02-14 | 5810-804-1324 | 1.10 ppb |
| 2017-02-14 | 5810-801-1149 | 2.20 ppb |
| 2017-02-14 | 5810-802-1417 | 1.20 ppb |
| 2017-05-08 | 5701-803-0844 | 1.01 ppb |
| 2017-05-08 | 5701-801-0844 | 2.76 ppb |
| 2017-05-08 | 5701-804-0844 | 1.18 ppb |
| 2017-05-08 | 5701-802-0844 | 0.880 ppb |
| 2017-06-21 | 5701-015-1444 | ND |
| 2017-08-14 | 5810-803-1639 | 1.20 ppb |
| 2017-08-14 | 5810-801-1700 | 4.80 ppb |
| 2017-08-14 | 5810-804-1724 | 1.20 ppb |
| 2017-08-14 | 5810-802-1753 | ND |
| 2017-11-13 | 5701-803-0835 | 1.74 ppb |
| 2017-11-13 | 5701-804-0835 | 1.24 ppb |
| 2017-11-13 | 5701-801-0835 | 4.37 ppb |
| 2017-11-13 | 5701-802-0835 | 1.40 ppb |
| 2018-02-12 | 5810-804-0945 | 1.50 ppb |
| 2018-02-12 | 5810-802-1133 | 1.50 ppb |
| 2018-02-12 | 5810-801-1119 | 3.70 ppb |
| 2018-02-12 | 5810-803-0920 | 1.60 ppb |
| 2018-05-14 | 5701-804-0841 | 2.04 ppb |
| 2018-05-14 | 5701-801-0840 | 5.69 ppb |
| 2018-05-14 | 5701-802-0840 | 1.32 ppb |
| 2018-05-14 | 5701-803-0841 | 1.61 ppb |
| 2018-06-20 | 5701-008-1020 | 0.690 ppb |
| 2018-08-14 | 5701-802-1022 | 1.70 ppb |
| 2018-08-14 | 5701-803-1022 | 1.78 ppb |
| 2018-08-14 | 5701-801-1022 | 5.18 ppb |
| 2018-08-14 | 5701-804-1022 | 2.02 ppb |
| 2018-11-14 | 5701-803-0920 | 2.16 ppb |
| 2018-11-14 | 5701-801-0920 | 4.29 ppb |
| 2018-11-14 | 5701-804-0920 | 1.61 ppb |
| 2018-11-14 | 5701-802-0920 | 1.45 ppb |
| 2019-02-11 | 5810-803-1017 | 1.80 ppb |
| 2019-02-11 | 5810-804-1031 | 1.50 ppb |
| 2019-02-11 | 5810-801-1045 | 3.50 ppb |
| 2019-02-11 | 5810-802-1059 | 1.70 ppb |
| 2019-03-20 | 5810-012-1130 | ND |
| 2019-04-17 | 5701-006-1155 | 0.760 ppb |
| 2019-06-17 | 5701-014-1016 | ND |
| 2019-08-20 | 5701-801-1142 | 2.11 ppb |
| 2019-08-20 | 5701-803-1418 | 1.52 ppb |
| 2019-09-17 | 5701-007-1131 | ND |
| 2019-10-15 | 5701-006-1500 | ND |