Silver
City of Laredo
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.
26
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 | 1 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-19 | AC43511 | ND |
| 2015-03-16 | AC84345 | ND |
| 2015-11-17 | AD13753 | ND |
| 2015-11-18 | AD13972 | ND |
| 2015-11-18 | AD13971 | ND |
| 2015-12-14 | AD16711 | ND |
| 2016-02-16 | AD23582 | ND |
| 2016-06-20 | AD41291 | ND |
| 2016-06-20 | AD41290 | ND |
| 2016-07-21 | AD45134 | ND |
| 2016-07-21 | AD45137 | ND |
| 2017-02-21 | AD71206 | ND |
| 2017-02-21 | AD71199 | ND |
| 2017-09-05 | AD94689 | ND |
| 2017-09-05 | AD94690 | ND |
| 2017-12-05 | AE06723 | ND |
| 2018-03-05 | AE16575 | ND |
| 2018-07-16 | AE33485 | ND |
| 2018-10-16 | AE43559 | ND |
| 2018-10-16 | AE43558 | ND |
| 2018-10-16 | AE43560 | ND |
| 2019-03-11 | AE57783 | ND |
| 2019-03-11 | AE57784 | ND |
| 2019-06-06 | AE69376 | ND |
| 2019-08-20 | AE79751 | ND |
| 2019-08-20 | AE79750 | ND |