Silver
City of Humble
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.
11
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 | 4 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-11 | AC42146 | ND |
| 2014-02-11 | AC42145 | ND |
| 2014-02-11 | AC42150 | ND |
| 2014-02-11 | AC42148 | ND |
| 2016-01-21 | AD19201 | ND |
| 2017-01-05 | AD63163 | ND |
| 2017-01-05 | AD63159 | ND |
| 2017-01-05 | AD63158 | ND |
| 2017-01-05 | AD63160 | ND |
| 2017-04-21 | AD80589 | ND |
| 2019-01-15 | AE49757 | ND |