Germanium
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 germanium. Sample information shown below was taken by San Francisco Regional Water System.
Germanium is a naturally occuring element used as a component in semiconductors and fiber optics. Excessive exposures to germanium may harm the kidneys.
0
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 2 | 0 | ND |
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 germanium. Sample information shown below was taken by San Francisco Regional Water System.
| Date | Lab ID | Result |
|---|