Silver
North Castle Water District #4
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.
28
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 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 6 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-07-24 | AU15716-INS | ND |
| 2018-07-24 | AU15718-INS | ND |
| 2019-08-05 | AV16474-INS | ND |
| 2019-08-05 | AV16471-INS | ND |
| 2020-02-25 | AW03861-INS | ND |
| 2020-02-25 | AW03853-INS | ND |
| 2020-02-25 | AW03855-INS | ND |
| 2020-07-13 | AW13180-INS | ND |
| 2020-07-29 | AW14499-INS | ND |
| 2020-08-27 | AW16635-INS | ND |
| 2021-03-02 | AX04052-INS | ND |
| 2021-03-03 | AX04224-INS | ND |
| 2021-03-03 | AX04226-INS | ND |
| 2021-07-06 | AX13097-INS | ND |
| 2021-08-03 | AX15569-INS | ND |
| 2021-08-03 | AX15556-INS | ND |
| 2022-03-01 | AY03618-INS | ND |
| 2022-03-01 | AY03616-INS | ND |
| 2022-03-01 | AY03622-INS | ND |
| 2022-07-19 | AY12490-SEC | ND |
| 2022-07-20 | AY12624-INS | ND |
| 2022-07-21 | AY12753-INS | ND |
| 2023-03-21 | AZ5922909-INS | ND |
| 2023-03-21 | AZ05015-INS | ND |
| 2023-03-22 | AZ05102-INS | ND |
| 2023-07-10 | AZ12341-INS | ND |
| 2023-07-10 | AZ12342-INS | ND |
| 2023-07-25 | AZ13469-INS | ND |