Silver
Groton Utilities
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.
12
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 | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-10-23 | 19674IOC1 | ND |
| 2014-10-23 | 19754IOCR | ND |
| 2015-10-15 | 21610IOCR | ND |
| 2015-10-15 | 21604IOC1 | ND |
| 2016-10-27 | 23866IOCR | ND |
| 2016-10-27 | 23874IOC1 | ND |
| 2017-10-26 | 26174IOCR | ND |
| 2017-10-26 | 26179IOC1 | ND |
| 2018-11-29 | 28467IOCR | ND |
| 2018-11-29 | 28430IOC1 | ND |
| 2019-11-20 | 30564IOCR | ND |
| 2019-11-20 | 30566IOC1 | ND |