Bromochloromethane
California Water Service - San Mateo
NOTE: California Water Service - San Mateo purchases water from San Francisco Regional Water System which is required to test for bromochloromethane. Sample information shown below was taken by San Francisco Regional Water System.
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 |
|---|---|---|---|---|
| 2014 | ND | 4 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
NOTE: California Water Service - San Mateo purchases water from San Francisco Regional Water System which is required to test for bromochloromethane. Sample information shown below was taken by San Francisco Regional Water System.
| Date | Lab ID | Result |
|---|---|---|
| 2018-06-28 | 9590-015-0950 | ND |