Silver
Fern Valley Water District
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.
20
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 | 9 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 10 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-05-14 | 4790-004-0900 | ND |
| 2015-05-14 | 4790-009-0925 | ND |
| 2015-06-01 | 4790-005-0943 | ND |
| 2015-08-19 | 4790-016-0921 | ND |
| 2015-09-15 | 4790-022-1121 | ND |
| 2015-09-15 | 4790-021-1132 | ND |
| 2015-09-30 | 4790-011-1513 | ND |
| 2015-10-01 | 4790-010-1045 | ND |
| 2015-10-15 | 4790-015-1021 | ND |
| 2016-04-19 | 4790-014-0922 | ND |
| 2018-03-06 | 4790-004-0937 | ND |
| 2018-03-06 | 4790-016-0921 | ND |
| 2018-03-06 | 4790-005-1009 | ND |
| 2018-03-15 | 4790-014-1144 | ND |
| 2018-03-15 | 4790-015-1216 | ND |
| 2018-03-15 | 4790-011-1027 | ND |
| 2018-03-15 | 4790-009-1034 | ND |
| 2018-03-15 | 4790-021-0944 | ND |
| 2018-04-02 | 4790-010-1607 | ND |
| 2018-04-02 | 4790-022-1650 | ND |