Silver
Town of Discovery Bay
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.
10
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 | 5 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 5 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-03-11 | 5867-002-1410 | ND |
| 2015-03-11 | 5867-008-1428 | ND |
| 2015-03-11 | 5867-016-1256 | ND |
| 2015-03-12 | 5867-006-0855 | ND |
| 2015-03-12 | 5867-007-0838 | ND |
| 2018-04-13 | 5867-002-0950 | ND |
| 2018-04-13 | 5867-006-1140 | ND |
| 2018-04-13 | 5867-007-1050 | ND |
| 2018-04-13 | 5867-008-1010 | ND |
| 2018-04-13 | 5867-016-0900 | ND |