Silver
California Water Service - South San Francisco
Silver occurs naturally in surface and groundwater and can be added to water as a biocide that inhibits growth of bacteria and algae. Increasingly, the use of antimicrobial nano-sized silver particles in consumer products contributes to silver in water sources used for drinking water.
8
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-10-16 | 5810-007-0952 | ND |
| 2015-06-25 | 5810-003-1338 | ND |
| 2015-06-25 | 5810-006-1347 | ND |
| 2016-06-07 | 5810-013-1337 | ND |
| 2016-06-07 | 5810-014-1352 | ND |
| 2016-07-21 | 5810-014-1020 | ND |
| 2016-08-24 | 5810-013-1035 | ND |
| 2017-12-05 | 5810-008-1320 | ND |