Silver
St. Tam Parish - Cross Gates SD
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.
8
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 | 4 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 5.00 ppb | 4 | 2 | ND - 10.00 ppb |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-05-27 | AD91738 | ND |
| 2014-05-27 | AD91748 | ND |
| 2014-05-27 | AD91738 | ND |
| 2014-05-27 | AD91748 | ND |
| 2017-05-02 | AE13999 | 10.00 ppb |
| 2017-05-02 | AE14007 | ND |
| 2017-05-02 | AE13999 | 10.00 ppb |
| 2017-05-02 | AE14007 | ND |