Bromochloromethane
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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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2019-05-08 | H19050245-001E | ND |
| 2019-05-08 | H19050245-002E | ND |
| 2019-06-20 | H19060515-001C | ND |
| 2020-10-21 | H20100621-001A | ND |
| 2020-10-21 | H20100621-002A | ND |
| 2020-11-04 | H20110094-001A | ND |
| 2020-11-30 | H20110648-001A | ND |
| 2021-03-17 | H21030419-001A | ND |
| 2021-04-05 | H21040068-001A | ND |
| 2021-09-17 | H21090509-001B | ND |
| 2022-03-21 | H22030506-001B | ND |
| 2022-06-29 | H22060897-001A | ND |
| 2022-08-22 | H22080673-001B | ND |
| 2022-11-07 | H22110237-001C | ND |
| 2023-03-29 | H23030641-001C | ND |