Silver
City of Sunnyvale
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.
12
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 | ND | 6 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 6 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-02-11 | 5810-003-1046 | ND |
| 2015-02-11 | 5810-004-1105 | ND |
| 2015-02-11 | 5810-007-0945 | ND |
| 2015-02-11 | 5810-010-1140 | ND |
| 2015-02-11 | 5810-012-1205 | ND |
| 2015-10-28 | 5810-008-1002 | ND |
| 2018-03-14 | 5810-003-1050 | ND |
| 2018-03-14 | 5810-004-1115 | ND |
| 2018-03-14 | 5810-007-0905 | ND |
| 2018-03-14 | 5810-008-0810 | ND |
| 2018-03-14 | 5810-010-0935 | ND |
| 2018-03-14 | 5810-012-1027 | ND |