Silver
Harlingen Water Works System
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
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 | 2 | 0 | ND |
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-03-06 | AC45919 | ND |
2014-05-07 | AC53351 | ND |
2015-03-19 | AC85215 | ND |
2015-06-18 | AC96463 | ND |
2016-03-08 | AD27493 | ND |
2016-06-27 | AD41843 | ND |
2017-03-16 | AD75380 | ND |
2017-05-18 | AD84777 | ND |
2018-02-20 | AE14336 | ND |
2018-06-13 | AE29719 | ND |
2019-02-06 | AE53093 | ND |
2019-08-07 | AE77372 | ND |