Silver
Madison Water Utility
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 |
|---|---|---|---|---|
| 2014 | ND | 3 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 21 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-14 | 140203101 | ND |
| 2014-02-17 | 140203501 | ND |
| 2014-07-15 | 140707101 | ND |
| 2015-03-11 | 150301601 | ND |
| 2017-06-06 | 1706543-008A | ND |
| 2017-06-06 | 1706543-006A | ND |
| 2017-06-06 | 1706543-001A | ND |
| 2017-06-06 | 1706543-005A | ND |
| 2017-06-06 | 1706543-004A | ND |
| 2017-06-06 | 1706543-003A | ND |
| 2017-06-06 | 1706543-002A | ND |
| 2017-06-06 | 1706543-007A | ND |
| 2017-06-07 | 1706619-003A | ND |
| 2017-06-07 | 1706619-004A | ND |
| 2017-06-07 | 1706619-006A | ND |
| 2017-06-07 | 1706619-008A | ND |
| 2017-06-07 | 1706619-002A | ND |
| 2017-06-07 | 1706619-009A | ND |
| 2017-06-07 | 1706619-007A | ND |
| 2017-06-07 | 1706619-010A | ND |
| 2017-06-07 | 1706619-005A | ND |
| 2017-06-07 | 1706619-001A | ND |
| 2017-08-14 | 1708C04-001A | ND |
| 2017-08-14 | 1708C09-001A | ND |
| 2017-09-25 | 1709K29-001A | ND |
| 2018-07-10 | 1066172 | ND |