Dibromochloromethane
Sparta
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 | 1.13 ppb | 8 | 4 | ND - 3.96 ppb |
2015 | 2.86 ppb | 11 | 8 | ND - 5.64 ppb |
2016 | 1.51 ppb | 12 | 10 | ND - 2.81 ppb |
2017 | 1.99 ppb | 16 | 12 | ND - 3.41 ppb |
2018 | 1.89 ppb | 16 | 16 | 0.504 ppb - 5.32 ppb |
2019 | 1.44 ppb | 16 | 14 | ND - 2.87 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 | 4020541-02 | 3.93 ppb |
2014-02-05 | 4020541-01 | 3.96 ppb |
2014-05-06 | 4050801-01 | ND |
2014-05-06 | 4050801-02 | ND |
2014-08-06 | 4081347-01 | 0.583 ppb |
2014-08-06 | 4081347-02 | 0.606 ppb |
2014-11-02 | 4110250-01 | ND |
2014-11-02 | 4110250-02 | ND |
2015-02-12 | 5022055-01 | 5.35 ppb |
2015-02-12 | 5022055-02 | 5.60 ppb |
2015-05-12 | 5051830-01 | ND |
2015-05-12 | 5051830-02 | ND |
2015-05-12 | 5051830-03 | ND |
2015-08-20 | 5083810-01 | 2.62 ppb |
2015-08-20 | 5083810-03 | 2.56 ppb |
2015-08-20 | 5083810-02 | 2.49 ppb |
2015-11-04 | 5110836-02 | 3.87 ppb |
2015-11-04 | 5110836-01 | 3.33 ppb |
2015-11-04 | 5110836-03 | 5.64 ppb |
2016-02-18 | 6022950-03 | 1.39 ppb |
2016-02-18 | 6022950-02 | 1.24 ppb |
2016-02-18 | 6022950-01 | 1.01 ppb |
2016-05-05 | 6051098-03 | 2.65 ppb |
2016-05-05 | 6051098-01 | 2.59 ppb |
2016-05-05 | 6051098-02 | 2.80 ppb |
2016-08-17 | 6083533-01 | 0.739 ppb |
2016-08-17 | 6083533-03 | 2.81 ppb |
2016-08-17 | 6083533-02 | ND |
2016-11-21 | 6113491-01 | 1.35 ppb |
2016-11-21 | 6113491-03 | ND |
2016-11-21 | 6113491-02 | 1.50 ppb |
2017-02-22 | 7023339-01 | 3.36 ppb |
2017-02-22 | 7023339-03 | 3.41 ppb |
2017-02-22 | 7023339-04 | 3.32 ppb |
2017-02-22 | 7023339-02 | 3.25 ppb |
2017-05-11 | 7052315-03 | ND |
2017-05-11 | 7052315-04 | ND |
2017-05-11 | 7052315-02 | ND |
2017-05-11 | 7052315-01 | ND |
2017-08-24 | 7084810-03 | 1.78 ppb |
2017-08-24 | 7084810-02 | 2.11 ppb |
2017-08-24 | 7084810-01 | 1.94 ppb |
2017-08-24 | 7084810-04 | 2.25 ppb |
2017-11-16 | 7113257-03 | 2.62 ppb |
2017-11-16 | 7113257-02 | 2.56 ppb |
2017-11-16 | 7113257-01 | 2.65 ppb |
2017-11-16 | 7113257-04 | 2.52 ppb |
2018-02-14 | 8022559-04 | 2.38 ppb |
2018-02-14 | 8022559-03 | 3.12 ppb |
2018-02-14 | 8022559-02 | 2.30 ppb |
2018-02-14 | 8022559-01 | 2.39 ppb |
2018-05-24 | 8054694-04 | 2.37 ppb |
2018-05-24 | 8054694-01 | 1.15 ppb |
2018-05-24 | 8054694-02 | 3.47 ppb |
2018-05-24 | 8054694-03 | 5.32 ppb |
2018-08-29 | 8085831-04 | 1.41 ppb |
2018-08-29 | 8085831-03 | 1.34 ppb |
2018-08-29 | 8085831-02 | 1.32 ppb |
2018-08-29 | 8085831-01 | 1.35 ppb |
2018-11-26 | 8114393-01 | 0.547 ppb |
2018-11-26 | 8114393-02 | 0.532 ppb |
2018-11-26 | 8114393-03 | 0.694 ppb |
2018-11-26 | 8114393-04 | 0.504 ppb |
2019-02-21 | 9023838-01 | 0.508 ppb |
2019-02-21 | 9023838-02 | 0.542 ppb |
2019-02-21 | 9023838-03 | ND |
2019-02-21 | 9023838-04 | ND |
2019-05-29 | 9055709-01 | 1.35 ppb |
2019-05-29 | 9055709-04 | 1.43 ppb |
2019-05-29 | 9055709-03 | 1.61 ppb |
2019-05-29 | 9055709-02 | 0.592 ppb |
2019-08-27 | 9085840-02 | 2.50 ppb |
2019-08-27 | 9085840-04 | 2.54 ppb |
2019-08-27 | 9085840-03 | 2.87 ppb |
2019-08-27 | 9085840-01 | 2.55 ppb |
2019-11-25 | 9114549-04 | 1.27 ppb |
2019-11-25 | 9114549-03 | 2.01 ppb |
2019-11-25 | 9114549-02 | 1.87 ppb |
2019-11-25 | 9114549-01 | 1.34 ppb |