Silver
City of Hollister
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.
29
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 | 6 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 5 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 13 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-06-12 | 1610-009-1055 | ND |
| 2014-06-12 | 1610-007-1250 | ND |
| 2014-06-12 | 1610-006-1315 | ND |
| 2014-06-12 | 1610-005-1015 | ND |
| 2014-06-12 | 1610-002-1145 | ND |
| 2014-06-12 | 1610-001-1205 | ND |
| 2015-09-16 | 1610-006-0914 | ND |
| 2015-09-16 | 1610-009-1150 | ND |
| 2015-09-16 | 1610-007-0900 | ND |
| 2015-09-16 | 1610-001-1035 | ND |
| 2015-09-16 | 1610-005-0847 | ND |
| 2017-06-01 | 1610-001-1011 | ND |
| 2017-06-01 | 1610-002-1045 | ND |
| 2017-06-08 | 1610-006-1236 | ND |
| 2017-06-08 | 1610-005-1150 | ND |
| 2017-06-08 | 1610-007-0916 | ND |
| 2019-04-11 | 1610-007-0833 | ND |
| 2019-04-11 | 1610-001-1130 | ND |
| 2019-04-11 | 1610-002-1100 | ND |
| 2019-04-11 | 1610-006-0907 | ND |
| 2019-04-11 | 1610-005-0848 | ND |
| 2019-09-10 | 1610-007-0830 | ND |
| 2019-09-10 | 1610-002-0904 | ND |
| 2019-09-10 | 1610-001-0913 | ND |
| 2019-09-10 | 1610-005-0953 | ND |
| 2019-10-15 | 1610-002-1054 | ND |
| 2019-10-15 | 1610-007-0926 | ND |
| 2019-10-15 | 1610-005-1007 | ND |
| 2019-10-15 | 1610-001-1046 | ND |