Silver
City of Graham
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 1 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | ND | 1 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-06-09 | Q1420055005 | ND |
2015-03-04 | Q1508358001 | ND |
2016-03-22 | Q1611821003 | ND |
2017-03-09 | Q1710223002 | ND |
2018-05-10 | AE28144 | ND |
2019-02-14 | Q1907061007 | ND |