Bromochloromethane
Ridge Spring, Town 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 |
|---|---|---|---|---|
| 2013 | ND | 6 | 0 | ND |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 3 | 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 |
|---|---|---|
| 2013-03-06 | 100637P | ND |
| 2013-03-06 | 100636P | ND |
| 2013-06-05 | 101547P | ND |
| 2013-09-10 | 102160Q | ND |
| 2013-09-10 | 102159P | ND |
| 2013-12-04 | 102868P | ND |
| 2018-01-17 | AE06217 | ND |
| 2018-05-02 | AE11636 | ND |
| 2018-07-18 | AE15231 | ND |
| 2018-10-17 | AE19864 | ND |
| 2019-02-27 | AE26426 | ND |
| 2019-04-02 | AE28055 | ND |
| 2019-07-16 | AE33704 | ND |
| 2019-11-25 | AE40764 | ND |
| 2020-02-11 | AE44279 | ND |
| 2020-04-22 | AE47574 | ND |
| 2020-12-09 | AE58678 | ND |
| 2021-02-24 | AE61854 | ND |
| 2021-06-24 | AE67917 | ND |
| 2021-07-21 | AE69291 | ND |
| 2021-11-17 | AE75295 | ND |
| 2022-01-12 | AE77416 | ND |
| 2022-04-20 | AE82499 | ND |
| 2022-11-16 | AE93064 | ND |
| 2023-10-18 | AF10384 | ND |