Silver
Hardin County Water District #1/Ft. Knox
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.
12
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 | 1.10 ppb | 2 | 1 | ND - 2.20 ppb |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | 15.5 ppb | 2 | 1 | ND - 31.0 ppb |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-10 | 2988431R2 | 2.20 ppb |
| 2014-04-01 | 3000550 | ND |
| 2015-03-03 | 3197986R3 | ND |
| 2015-04-15 | 3225014R3 | ND |
| 2016-03-09 | 3412086R3 | ND |
| 2016-10-03 | 3557249R3 | ND |
| 2017-06-28 | 3722925R3 | ND |
| 2017-07-17 | 3734014R3 | ND |
| 2018-05-15 | 3937156R2 | ND |
| 2018-06-06 | 3954316 | ND |
| 2019-05-29 | 4309715 | ND |
| 2019-10-03 | 4444484R2 | 31.0 ppb |