Silver
Bethel Water Department
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.
26
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 | 5 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | 0.200 ppb | 5 | 1 | ND - 1.000 ppb |
| 2018 | 0.125 ppb | 4 | 4 | 0.1000 ppb - 0.200 ppb |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-05-12 | 186387CH | ND |
| 2014-05-12 | 186388CH | ND |
| 2014-05-12 | 186386CH | ND |
| 2014-07-29 | 189024CH | ND |
| 2014-07-29 | 189025CH | ND |
| 2015-02-12 | 194165CH | ND |
| 2015-02-12 | 194166CH | ND |
| 2015-02-12 | 194163CH | ND |
| 2015-02-12 | 194164CH | ND |
| 2016-02-09 | 205077CH | ND |
| 2016-02-09 | 205074CH | ND |
| 2016-05-12 | 208040GE | ND |
| 2016-05-12 | 208039GE | ND |
| 2017-05-02 | 219540GE | ND |
| 2017-10-23 | 306301GE | ND |
| 2017-10-23 | 306303GE | ND |
| 2017-10-23 | 306302GE | 1.000 ppb |
| 2017-10-23 | 306304GE | ND |
| 2018-02-06 | 309176GE | 0.200 ppb |
| 2018-02-06 | 309179GE | 0.1000 ppb |
| 2018-02-06 | 309178GE | 0.1000 ppb |
| 2018-02-06 | 309181GE | 0.1000 ppb |
| 2019-01-29 | 320474GE | ND |
| 2019-01-29 | 320485GE | ND |
| 2019-01-29 | 320480GE | ND |
| 2019-01-29 | 320490GE | ND |