Silver
Arlington Water Department
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.
13
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | 0.667 ppb | 3 | 2 | ND - 1.000 ppb |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-04-22 | 16695 | ND |
| 2014-10-21 | 46951 | ND |
| 2015-04-14 | 15740 | ND |
| 2016-04-18 | ND | |
| 2016-08-24 | ND | |
| 2017-04-26 | ND | |
| 2017-12-14 | 1.000 ppb | |
| 2017-12-14 | 1.000 ppb | |
| 2018-04-17 | ND | |
| 2018-08-14 | ND | |
| 2018-08-14 | ND | |
| 2019-04-02 | ND | |
| 2019-09-11 | ND |