Silver
Portsmouth Water Works
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 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 7 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2016-02-03 | B600549002 | ND |
| 2016-02-03 | B600549004 | ND |
| 2016-02-03 | B600549006 | ND |
| 2016-02-08 | B600586002 | ND |
| 2016-02-08 | B600586004 | ND |
| 2016-02-08 | B600586006 | ND |
| 2016-08-18 | B607708002 | ND |
| 2018-02-08 | 43406-003 | ND |