Bromochloromethane
City of Castroville
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 | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 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
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-28 | AE20664 | ND |
| 2018-03-28 | AE20680 | ND |
| 2019-06-18 | AE71110 | ND |
| 2019-06-18 | AE71116 | ND |
| 2020-01-28 | AE95679 | ND |
| 2020-01-28 | AE95685 | ND |
| 2021-06-28 | AF59673 | ND |
| 2021-06-28 | AF59675 | ND |
| 2022-02-08 | AF83711 | ND |
| 2022-02-08 | AF83715 | ND |
| 2023-03-28 | AG34417 | ND |
| 2023-03-28 | AG34419 | ND |