Silver
City of South Pasadena
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.
7
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-05-20 | 9588-006-0850 | ND |
| 2015-08-20 | 9588-002-0925 | ND |
| 2016-08-12 | 9588-005-0935 | ND |
| 2018-05-25 | 9588-006-0815 | ND |
| 2018-06-05 | 9590-005-0640 | ND |
| 2018-06-05 | 9590-006-0650 | ND |
| 2019-08-21 | 9588-005-0910 | ND |