Silver
Bonney Lake 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.
21
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 | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-08-20 | 53639 | ND |
| 2014-08-20 | 53640 | ND |
| 2014-08-20 | 53641 | ND |
| 2014-08-20 | 53638 | ND |
| 2015-09-01 | 58322 | ND |
| 2015-09-01 | 58320 | ND |
| 2015-09-01 | 58321 | ND |
| 2015-09-01 | 58319 | ND |
| 2016-09-20 | ND | |
| 2016-09-20 | ND | |
| 2016-09-20 | ND | |
| 2017-07-17 | ND | |
| 2017-07-17 | ND | |
| 2018-03-20 | ND | |
| 2018-03-20 | ND | |
| 2018-07-17 | ND | |
| 2018-07-17 | ND | |
| 2019-03-25 | ND | |
| 2019-03-25 | ND | |
| 2019-03-25 | ND | |
| 2019-06-04 | ND |