Silver
South Grayson Special Utility 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.
9
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 | 1 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-04-08 | Q1512852016 | ND |
| 2016-10-19 | Q1644668007 | ND |
| 2016-10-19 | Q1644668008 | ND |
| 2016-10-19 | Q1644668011 | ND |
| 2017-08-07 | Q1732976006 | ND |
| 2018-10-15 | Q1840862015 | ND |
| 2019-08-13 | Q1954236020 | ND |
| 2019-08-13 | Q1954236001 | ND |
| 2019-08-13 | Q1954236002 | ND |