Silver
City of Sonoma
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.
13
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 | 5 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-17 | 9541-001-1050 | ND |
| 2014-03-17 | 9541-003-0920 | ND |
| 2014-03-17 | 9541-004-0920 | ND |
| 2014-03-17 | 9541-006-0920 | ND |
| 2014-09-03 | 9541-023-0910 | ND |
| 2015-05-13 | 9541-023-0920 | ND |
| 2016-03-29 | 9541-002-0735 | ND |
| 2017-04-04 | 9541-001-0900 | ND |
| 2017-04-04 | 9541-003-1000 | ND |
| 2017-04-04 | 9541-004-1125 | ND |
| 2017-04-04 | 9541-006-1040 | ND |
| 2018-10-23 | 9541-023-0945 | ND |
| 2019-09-04 | 9541-002-1208 | ND |