Silver
Cazadero Water Company Inc.
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.
16
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | 32.5 ppb | 4 | 1 | ND - 130.0 ppb |
| 2023 | ND | 4 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-03-22 | CA4900508_011_011-201903221030 | ND |
| 2019-03-22 | CA4900508_001_001-201903221150 | ND |
| 2019-03-22 | CA4900508_005_005-201903221010 | ND |
| 2019-03-22 | CA4900508_006_006-201903221050 | ND |
| 2020-12-17 | CA4900508_001_001-202012171230 | ND |
| 2020-12-21 | CA4900508_011_011-202012210725 | ND |
| 2021-06-08 | CA4900508_005_005-202106080926 | ND |
| 2021-06-08 | CA4900508_006_006-202106080901 | ND |
| 2022-03-14 | CA4900508_001_001-202203141146 | 130.0 ppb |
| 2022-03-14 | CA4900508_011_011-202203141039 | ND |
| 2022-11-03 | CA4900508_005_005-202211031155 | ND |
| 2022-11-03 | CA4900508_006_006-202211031102 | ND |
| 2023-03-06 | CA4900508_001_001-202303060812 | ND |
| 2023-03-06 | CA4900508_011_011-202303060912 | ND |
| 2023-12-11 | CA4900508_006_006-202312111315 | ND |
| 2023-12-11 | CA4900508_005_005-202312111300 | ND |