Silver
Johnstown Water Works
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.
10
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 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-11 | JH1400905-IOCSEC | ND |
| 2014-02-11 | JH1400907-IOCSEC | ND |
| 2015-02-17 | JH1500988-IOCSEC | ND |
| 2015-02-17 | JH1500986-IOCSEC | ND |
| 2016-03-15 | JH1600872-IOCSEC | ND |
| 2016-03-15 | JH1600871-IOCSEC | ND |
| 2017-02-14 | JH1701101-IOCSEC | ND |
| 2017-02-14 | JH1701103-IOCSEC | ND |
| 2018-01-22 | JH1800427-IOCSEC | ND |
| 2018-01-22 | JH1800428-IOCSEC | ND |