Silver
City of San Jose - EVG/EDV/COY
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.
18
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 | 8 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-21 | 9590-006-0839 | ND |
| 2014-01-21 | 9590-005-0914 | ND |
| 2014-02-18 | 9590-012-0902 | ND |
| 2014-03-27 | 1610-004-0900 | ND |
| 2014-03-27 | 1610-003-0810 | ND |
| 2014-03-27 | 1610-002-1000 | ND |
| 2014-03-27 | 1610-001-1130 | ND |
| 2014-08-05 | 1610-007-0920 | ND |
| 2016-07-19 | 1610-011-0958 | ND |
| 2016-07-19 | 1610-013-0918 | ND |
| 2017-01-17 | 1610-002-0835 | ND |
| 2017-01-17 | 1610-004-0925 | ND |
| 2017-01-17 | 1610-001-1036 | ND |
| 2017-01-31 | 1610-003-0819 | ND |
| 2017-05-16 | 1610-012-1158 | ND |
| 2017-09-26 | 1610-013-1030 | ND |
| 2019-05-14 | 1610-012-0949 | ND |
| 2019-07-16 | 1610-011-1028 | ND |