Silver
Natick 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 | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Result |
|---|---|
| 2014-11-04 | ND |
| 2014-11-04 | ND |
| 2014-11-04 | ND |
| 2014-11-04 | ND |
| 2015-05-26 | ND |
| 2015-05-26 | ND |
| 2015-05-26 | ND |
| 2015-05-26 | ND |
| 2016-09-07 | ND |
| 2016-09-07 | ND |
| 2016-09-07 | ND |
| 2016-09-07 | ND |
| 2017-12-14 | ND |
| 2017-12-14 | ND |
| 2017-12-14 | ND |
| 2017-12-14 | ND |
| 2018-10-16 | ND |
| 2018-10-16 | ND |
| 2018-10-16 | ND |
| 2018-10-16 | ND |
| 2018-10-16 | ND |