Bromochloromethane
Ventura County Waterworks District No. 17 - Bell Canyon
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 |
|---|---|---|---|---|
| 2018 | 0.450 ppb | 10 | 3 | ND - 1.60 ppb |
| 2019 | 0.538 ppb | 8 | 4 | ND - 1.50 ppb |
| 2020 | 0.156 ppb | 9 | 1 | ND - 1.40 ppb |
| 2021 | 0.825 ppb | 8 | 6 | ND - 1.50 ppb |
| 2022 | 0.775 ppb | 8 | 3 | ND - 2.20 ppb |
| 2023 | 1.70 ppb | 7 | 4 | ND - 6.00 ppb |
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
| Date | Lab ID | Result |
|---|