Silver
City of Shafter
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2015-04-01 | 5806-003-1040 | ND |
| 2015-04-01 | 5806-004-1100 | ND |
| 2015-04-01 | 5806-007-1520 | ND |
| 2015-04-01 | 5806-008-0945 | ND |
| 2015-04-01 | 5806-017-0930 | ND |
| 2015-12-10 | 5806-021-1030 | ND |
| 2018-01-23 | 5867-021-1315 | ND |
| 2018-03-28 | 5867-008-1315 | ND |
| 2018-03-28 | 5867-017-1245 | ND |
| 2018-07-13 | 5806-025-0900 | ND |
| 2018-07-24 | 5867-007-0915 | ND |
| 2018-11-08 | 5806-023-0810 | ND |