Silver
City of Alamo Heights
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.
14
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 | N/A | 0 | 0 | N/A |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2016-03-15 | AD28737 | ND |
| 2016-03-15 | AD28733 | ND |
| 2016-03-15 | AD28732 | ND |
| 2016-03-15 | AD28728 | ND |
| 2016-03-15 | AD28734 | ND |
| 2017-02-14 | AD70609 | ND |
| 2017-02-14 | AD70607 | ND |
| 2017-02-14 | AD70603 | ND |
| 2017-02-14 | AD70604 | ND |
| 2018-01-10 | AE08541 | ND |
| 2019-03-27 | AE60167 | ND |
| 2019-03-27 | AE60171 | ND |
| 2019-03-27 | AE60170 | ND |
| 2019-03-27 | AE60169 | ND |