Silver
St John Water District 1
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 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-22 | AD88492 | ND |
| 2014-01-22 | AD88492 | ND |
| 2015-04-06 | 35182606003 | ND |
| 2015-04-06 | 35182606003 | ND |
| 2016-02-23 | 35231304005 | ND |
| 2016-02-23 | 35231304005 | ND |
| 2017-01-25 | 35291206002 | ND |
| 2017-01-25 | 35291206002 | ND |
| 2018-01-23 | 35370117004 | ND |
| 2018-01-23 | 35370117004 | ND |
| 2019-01-22 | 35444040001 | ND |
| 2019-01-22 | 35444040001 | ND |