Bromochloromethane
Dorchester, Village of
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 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 5 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2018-07-16 | 560158 | ND |
| 2019-07-15 | 621241 | ND |
| 2020-05-26 | 667014 | ND |
| 2020-09-14 | 684285 | ND |
| 2020-09-28 | 701100 | ND |
| 2021-07-19 | 745978 | ND |
| 2022-07-05 | 809302 | ND |
| 2022-07-27 | 818275 | ND |
| 2023-01-17 | 842469 | ND |
| 2023-04-24 | 855387 | ND |
| 2023-05-15 | 855924 | ND |
| 2023-07-17 | 873260 | ND |
| 2023-10-16 | 891653 | ND |