Dibromochloromethane
California Water Service - San Carlos
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 |
---|---|---|---|---|
2014 | 0.243 ppb | 16 | 2 | ND - 2.62 ppb |
2015 | 0.289 ppb | 16 | 4 | ND - 1.20 ppb |
2016 | 0.186 ppb | 16 | 4 | ND - 0.770 ppb |
2017 | 0.156 ppb | 16 | 2 | ND - 1.30 ppb |
2018 | 0.286 ppb | 16 | 4 | ND - 1.27 ppb |
2019 | 0.281 ppb | 16 | 4 | 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 |
---|---|---|
2014-02-05 | 5701-902-0840 | 2.62 ppb |
2014-02-05 | 5701-900-0815 | 1.27 ppb |
2014-02-05 | 5701-901-0750 | ND |
2014-02-05 | 5701-903-0900 | ND |
2014-05-07 | 5701-903-1045 | ND |
2014-05-07 | 5701-902-1105 | ND |
2014-05-07 | 5701-901-0950 | ND |
2014-05-07 | 5701-900-1015 | ND |
2014-08-06 | 5701-903-0855 | ND |
2014-08-06 | 5701-902-0930 | ND |
2014-08-06 | 5701-901-0800 | ND |
2014-08-06 | 5701-900-0830 | ND |
2014-11-03 | 5701-902-0930 | ND |
2014-11-03 | 5701-901-0825 | ND |
2014-11-03 | 5701-903-1000 | ND |
2014-11-03 | 5701-900-0855 | ND |
2015-02-04 | 5701-903-0852 | 1.14 ppb |
2015-02-04 | 5701-902-0852 | 1.19 ppb |
2015-02-04 | 5701-901-0852 | 1.10 ppb |
2015-02-04 | 5701-900-0852 | 1.20 ppb |
2015-05-05 | 5701-903-0814 | ND |
2015-05-05 | 5701-902-0814 | ND |
2015-05-05 | 5701-900-0814 | ND |
2015-05-05 | 5701-901-0814 | ND |
2015-08-03 | 5701-900-0802 | ND |
2015-08-03 | 5701-903-0802 | ND |
2015-08-03 | 5701-902-0802 | ND |
2015-08-03 | 5701-901-0802 | ND |
2015-11-03 | 5810-901-0930 | ND |
2015-11-03 | 5810-900-1010 | ND |
2015-11-03 | 5810-903-1025 | ND |
2015-11-03 | 5810-902-1050 | ND |
2016-02-02 | 5701-901-0905 | 0.730 ppb |
2016-02-02 | 5701-900-0905 | 0.770 ppb |
2016-02-02 | 5701-903-0905 | 0.720 ppb |
2016-02-02 | 5701-902-0905 | 0.760 ppb |
2016-05-02 | 5701-901-0711 | ND |
2016-05-02 | 5701-900-0711 | ND |
2016-05-02 | 5701-903-0711 | ND |
2016-05-02 | 5701-902-0711 | ND |
2016-08-02 | 5701-903-0908 | ND |
2016-08-02 | 5701-901-0908 | ND |
2016-08-02 | 5701-900-0908 | ND |
2016-08-02 | 5701-902-0908 | ND |
2016-11-07 | 5701-903-1250 | ND |
2016-11-07 | 5701-901-1345 | ND |
2016-11-07 | 5701-902-1315 | ND |
2016-11-07 | 5701-900-1235 | ND |
2017-02-06 | 5810-902-0940 | ND |
2017-02-06 | 5810-903-0805 | ND |
2017-02-06 | 5810-901-0915 | ND |
2017-02-06 | 5810-900-0815 | ND |
2017-05-01 | 5701-902-0855 | ND |
2017-05-01 | 5701-900-0935 | ND |
2017-05-01 | 5701-901-1000 | ND |
2017-05-01 | 5701-903-0910 | ND |
2017-08-09 | 5810-900-1455 | ND |
2017-08-09 | 5810-901-1505 | ND |
2017-08-09 | 5810-903-1425 | ND |
2017-08-09 | 5810-902-1440 | ND |
2017-11-07 | 5810-903-1045 | ND |
2017-11-07 | 5810-900-1005 | ND |
2017-11-07 | 5810-902-1020 | 1.30 ppb |
2017-11-07 | 5810-901-0930 | 1.20 ppb |
2018-02-05 | 5810-903-0830 | ND |
2018-02-05 | 5810-900-0850 | ND |
2018-02-05 | 5810-901-0810 | ND |
2018-02-05 | 5810-902-0910 | ND |
2018-05-07 | 5701-901-0849 | ND |
2018-05-07 | 5701-902-0849 | ND |
2018-05-07 | 5701-903-0849 | ND |
2018-05-07 | 5701-900-0849 | ND |
2018-08-06 | 5701-901-0814 | ND |
2018-08-06 | 5701-903-0814 | ND |
2018-08-06 | 5701-902-0814 | ND |
2018-08-06 | 5701-900-0814 | ND |
2018-11-05 | 5701-901-1029 | 1.11 ppb |
2018-11-05 | 5701-903-1029 | 1.27 ppb |
2018-11-05 | 5701-902-1029 | 1.24 ppb |
2018-11-05 | 5701-900-1029 | 0.950 ppb |
2019-02-06 | 5810-900-0855 | 1.10 ppb |
2019-02-06 | 5810-902-0920 | 1.10 ppb |
2019-02-06 | 5810-901-0835 | 1.20 ppb |
2019-02-06 | 5810-903-0905 | 1.10 ppb |
2019-05-07 | 5701-900-0904 | ND |
2019-05-07 | 5701-902-0904 | ND |
2019-05-07 | 5701-903-0904 | ND |
2019-05-07 | 5701-901-0904 | ND |
2019-08-06 | 5701-903-1115 | ND |
2019-08-06 | 5701-902-1200 | ND |
2019-08-06 | 5701-900-1145 | ND |
2019-08-06 | 5701-901-1050 | ND |
2019-11-13 | 5701-903-0950 | ND |
2019-11-13 | 5701-902-1000 | ND |
2019-11-13 | 5701-900-0935 | ND |
2019-11-13 | 5701-901-0915 | ND |