Silver
Dunedin Water System
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.
5
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 | 0.200 ppb | 1 | 1 | 0.200 ppb |
| 2016 | 0.1000 ppb | 1 | 1 | 0.1000 ppb |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Result |
|---|---|
| 2015-06-09 | 0.200 ppb |
| 2016-03-23 | 0.1000 ppb |
| 2017-02-03 | ND |
| 2018-04-06 | ND |
| 2019-02-26 | ND |