Dibromochloromethane
Edna Mahan Correctional
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | 0.193 ppb | 3 | 3 | 0.130 ppb - 0.260 ppb |
| 2016 | 0.0500 ppb | 2 | 1 | ND - 0.1000 ppb |
| 2017 | 0.900 ppb | 2 | 2 | 0.900 ppb |
| 2018 | 0.367 ppb | 3 | 2 | ND - 0.800 ppb |
| 2019 | 0.500 ppb | 2 | 2 | 0.200 ppb - 0.800 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 |
|---|---|---|
| 2014-07-22 | L5114545-2 | ND |
| 2014-07-22 | L5114545-1 | ND |
| 2015-07-20 | L5677356-2 | 0.190 ppb |
| 2015-07-20 | L5677356-1 | 0.260 ppb |
| 2015-09-17 | L5653974-1 | 0.130 ppb |
| 2016-07-25 | L6340013-2 | ND |
| 2016-07-25 | L6340013-1 | 0.1000 ppb |
| 2017-07-20 | L6875264-2 | 0.900 ppb |
| 2017-07-20 | L6875264-1 | 0.900 ppb |
| 2018-07-20 | L7045563-2 | 0.300 ppb |
| 2018-07-20 | L7045563-1 | 0.800 ppb |
| 2018-09-18 | L7039622-1 | ND |
| 2019-07-19 | L7138524-2 | 0.800 ppb |
| 2019-07-19 | L7138524-1 | 0.200 ppb |