Silver
City of Danville
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.
9
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 |
|---|---|---|---|---|
| 2014 | ND | 4 | 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 |
|---|---|---|
| 2014-02-07 | E140201218 | ND |
| 2014-02-07 | E140201217 | ND |
| 2014-02-07 | E140201216 | ND |
| 2014-05-05 | E140307361 | ND |
| 2015-08-03 | VA010-DCLS | ND |
| 2016-08-02 | E160505934 | ND |
| 2017-08-01 | E170601549 | ND |
| 2018-08-06 | E180600779 | ND |
| 2019-08-05 | 19081244-01A | ND |