Silver
City of Upland
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.
20
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 | 11 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 9 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-09-25 | 9590-021-1000 | ND |
| 2014-09-25 | 9590-048-0920 | ND |
| 2014-09-25 | 9590-045-1235 | ND |
| 2014-09-25 | 9590-040-0930 | ND |
| 2014-09-25 | 9590-038-0850 | ND |
| 2014-09-25 | 9590-036-0750 | ND |
| 2014-09-25 | 9590-026-1000 | ND |
| 2014-09-25 | 9590-024-1240 | ND |
| 2014-09-25 | 9590-023-1027 | ND |
| 2014-10-07 | 9590-004-0812 | ND |
| 2014-10-07 | 9590-047-0920 | ND |
| 2017-02-02 | 9590-001-1110 | ND |
| 2017-08-21 | 9590-036-0815 | ND |
| 2017-08-23 | 9590-045-0815 | ND |
| 2017-08-23 | 9590-040-0945 | ND |
| 2017-08-23 | 9590-038-1055 | ND |
| 2017-08-23 | 9590-026-1215 | ND |
| 2017-08-23 | 9590-024-0915 | ND |
| 2017-08-23 | 9590-023-1110 | ND |
| 2017-08-23 | 9590-021-0831 | ND |