Bromochloromethane
Woodinville Water District
NOTE: Woodinville Water District purchases water from Seattle Public Utilities which is required to test for bromochloromethane. Sample information shown below was taken by Seattle Public Utilities.
Bromochloromethane is a tap water disinfection byproduct; it is also used as an intermediate in chemical manufacturing and as a fire extinguishing agent. Disinfection byproducts in drinking water increase the risk of cancer.
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 | 1 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 2 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.06 ppb
The EWG Health Guideline of 0.06 ppb for bromochloromethane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer, harm to reproduction and child development, and change to fetal growth and development.
ppb = parts per billion
All test results
NOTE: Woodinville Water District purchases water from Seattle Public Utilities which is required to test for bromochloromethane. Sample information shown below was taken by Seattle Public Utilities.
| Date | Lab ID | Result |
|---|---|---|
| 2015-01-13 | 201501140525AM | ND |
| 2015-01-13 | 201501140778AM | ND |
| 2015-04-06 | 201504070229AM | ND |
| 2015-04-06 | 201504070359AM | ND |
| 2015-07-22 | 201507230482AM | ND |
| 2015-07-22 | 201507230496AM | ND |
| 2015-10-13 | 201509280091AM | ND |
| 2015-10-13 | 201509280090AM | ND |
| 2023-08-15 | 4542961 | ND |
| 2023-08-15 | 4542962 | ND |