Silver
North Marin Water District - Pt. Reyes
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.
11
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 | 4 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-09-09 | 1610-001-0800 | ND |
| 2014-09-09 | 1610-003-0815 | ND |
| 2014-09-09 | 1610-010-0750 | ND |
| 2015-02-05 | 1610-004-1340 | ND |
| 2015-11-17 | 1610-003-0941 | ND |
| 2015-11-17 | 1610-004-0915 | ND |
| 2015-11-17 | 1610-010-1005 | ND |
| 2016-02-16 | 1610-001-1040 | ND |
| 2018-09-11 | 1610-001-0845 | ND |
| 2018-09-11 | 1610-004-0935 | ND |
| 2018-09-11 | 1610-010-0910 | ND |