Dibromochloromethane
City of Atwater
Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane 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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 1.02 ppb | 12 | 9 | ND - 3.20 ppb |
2015 | 0.358 ppb | 16 | 5 | ND - 2.10 ppb |
2016 | 0.125 ppb | 24 | 4 | ND - 1.000 ppb |
2017 | 0.246 ppb | 16 | 5 | ND - 0.970 ppb |
2018 | 0.189 ppb | 16 | 3 | ND - 1.70 ppb |
2019 | 0.303 ppb | 24 | 8 | ND - 1.20 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.1 ppb
The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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 |
---|---|---|
2014-03-12 | 5806-900-0735 | 1.20 ppb |
2014-03-12 | 5806-901-0815 | 1.10 ppb |
2014-03-12 | 5806-902-0935 | 3.20 ppb |
2014-03-12 | 5806-903-0910 | 1.80 ppb |
2014-05-21 | 5806-900-0815 | ND |
2014-05-21 | 5806-901-0930 | 0.550 ppb |
2014-05-21 | 5806-902-1040 | 1.40 ppb |
2014-05-21 | 5806-903-1125 | 1.30 ppb |
2014-09-17 | 5806-900-0630 | ND |
2014-09-17 | 5806-901-0800 | ND |
2014-09-17 | 5806-902-0700 | 0.970 ppb |
2014-09-17 | 5806-903-0830 | 0.690 ppb |
2015-03-11 | 5806-900-1050 | ND |
2015-03-11 | 5806-901-1120 | ND |
2015-03-11 | 5806-902-1030 | 1.50 ppb |
2015-03-11 | 5806-903-1145 | ND |
2015-06-16 | 5806-900-1030 | ND |
2015-06-16 | 5806-901-1000 | ND |
2015-06-16 | 5806-902-1100 | 0.690 ppb |
2015-06-16 | 5806-903-0930 | ND |
2015-09-22 | 5806-900-0728 | ND |
2015-09-22 | 5806-901-0820 | ND |
2015-09-22 | 5806-902-0930 | 0.930 ppb |
2015-09-22 | 5806-903-1005 | ND |
2015-12-07 | 5806-900-0700 | ND |
2015-12-07 | 5806-901-0830 | ND |
2015-12-07 | 5806-902-0745 | 2.10 ppb |
2015-12-07 | 5806-903-0915 | 0.510 ppb |
2016-03-23 | 5806-013-0630 | ND |
2016-03-23 | 5806-014-0700 | ND |
2016-03-23 | 5806-015-0730 | ND |
2016-03-23 | 5806-016-0800 | ND |
2016-03-23 | 5806-017-0830 | ND |
2016-03-23 | 5806-018-0900 | ND |
2016-03-23 | 5806-019-0930 | ND |
2016-03-23 | 5806-021-1000 | ND |
2016-03-23 | 5806-900-0830 | ND |
2016-03-23 | 5806-901-1000 | ND |
2016-03-23 | 5806-902-0915 | 1.000 ppb |
2016-03-23 | 5806-903-1100 | 0.590 ppb |
2016-06-22 | 5806-900-0715 | ND |
2016-06-22 | 5806-901-0930 | ND |
2016-06-22 | 5806-902-0800 | ND |
2016-06-22 | 5806-903-0845 | ND |
2016-10-06 | 5806-900-0945 | ND |
2016-10-06 | 5806-901-1015 | ND |
2016-10-06 | 5806-902-0800 | ND |
2016-10-06 | 5806-903-1045 | ND |
2016-12-06 | 5806-900-0920 | ND |
2016-12-06 | 5806-901-1015 | ND |
2016-12-06 | 5806-902-0840 | 0.890 ppb |
2016-12-06 | 5806-903-1100 | 0.520 ppb |
2017-03-08 | 5806-900-0721 | ND |
2017-03-08 | 5806-901-0835 | ND |
2017-03-08 | 5806-902-0755 | 0.880 ppb |
2017-03-08 | 5806-903-0932 | ND |
2017-05-09 | 5806-900-0945 | ND |
2017-05-09 | 5806-901-0930 | ND |
2017-05-09 | 5806-902-1000 | 0.860 ppb |
2017-05-09 | 5806-903-1015 | 0.620 ppb |
2017-09-12 | 5806-900-0830 | ND |
2017-09-12 | 5806-901-0800 | ND |
2017-09-12 | 5806-902-0915 | ND |
2017-09-12 | 5806-903-0715 | ND |
2017-12-05 | 5806-900-0825 | ND |
2017-12-05 | 5806-901-0737 | ND |
2017-12-05 | 5806-902-0913 | 0.610 ppb |
2017-12-05 | 5806-903-1035 | 0.970 ppb |
2018-03-20 | 5806-900-0630 | ND |
2018-03-20 | 5806-901-0645 | ND |
2018-03-20 | 5806-902-0700 | 0.750 ppb |
2018-03-20 | 5806-903-0715 | ND |
2018-05-16 | 5806-900-0630 | ND |
2018-05-16 | 5806-901-0645 | ND |
2018-05-16 | 5806-902-0700 | 0.570 ppb |
2018-05-16 | 5806-903-0715 | ND |
2018-08-30 | 5806-900-0700 | ND |
2018-08-30 | 5806-901-0730 | ND |
2018-08-30 | 5806-902-0800 | 1.70 ppb |
2018-08-30 | 5806-903-0830 | ND |
2018-11-29 | 5806-900-0916 | ND |
2018-11-29 | 5806-901-1129 | ND |
2018-11-29 | 5806-902-1030 | ND |
2018-11-29 | 5806-903-1203 | ND |
2019-02-27 | 5806-013-1100 | ND |
2019-02-27 | 5806-014-1130 | ND |
2019-02-27 | 5806-015-0650 | ND |
2019-02-27 | 5806-016-1020 | 0.690 ppb |
2019-02-27 | 5806-017-0730 | ND |
2019-02-27 | 5806-018-0820 | 1.20 ppb |
2019-02-27 | 5806-019-0855 | ND |
2019-02-27 | 5806-021-1155 | ND |
2019-02-27 | 5806-900-0916 | 0.640 ppb |
2019-02-27 | 5806-901-1129 | ND |
2019-02-27 | 5806-902-1030 | 1.10 ppb |
2019-02-27 | 5806-903-1203 | 0.830 ppb |
2019-06-19 | 5806-900-0750 | ND |
2019-06-19 | 5806-901-0715 | ND |
2019-06-19 | 5806-902-0820 | ND |
2019-06-19 | 5806-903-0900 | ND |
2019-09-27 | 5806-900-0945 | ND |
2019-09-27 | 5806-901-0845 | ND |
2019-09-27 | 5806-902-1015 | 1.20 ppb |
2019-09-27 | 5806-903-0915 | ND |
2019-12-23 | 5806-901-0745 | ND |
2019-12-23 | 5806-902-0830 | 0.760 ppb |
2019-12-23 | 5806-903-0855 | ND |
2019-12-23 | 5806-904-0810 | 0.850 ppb |