Silver
Prestonsburg City Utilities
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.
6
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 | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | 28.0 ppb | 1 | 1 | 28.0 ppb |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-11 | 201403526001 | ND |
| 2015-03-03 | 201502552001 | ND |
| 2016-03-01 | 201602865001 | ND |
| 2017-03-07 | 201703247001 | ND |
| 2018-03-13 | 18006990 | 28.0 ppb |
| 2019-03-05 | 19006306 | ND |