Silver
City of Rio Grande City
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 |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-26 | AC44680 | ND |
| 2014-02-26 | AC44682 | ND |
| 2015-02-10 | AC80134 | ND |
| 2015-02-10 | AC80135 | ND |
| 2016-02-22 | AD24681 | ND |
| 2016-02-22 | AD24679 | ND |
| 2017-03-07 | AD74281 | ND |
| 2017-03-07 | AD74274 | ND |
| 2018-06-11 | AE29718 | ND |
| 2018-08-31 | AE39118 | ND |
| 2019-02-06 | AE53384 | ND |