Silver
Ayer DPW Water Division
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.
99
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 | 19 | 0 | ND |
| 2015 | ND | 22 | 0 | ND |
| 2016 | ND | 20 | 0 | ND |
| 2017 | 1.50 ppb | 6 | 2 | ND - 6.00 ppb |
| 2018 | 0.222 ppb | 18 | 3 | ND - 2.00 ppb |
| 2019 | ND | 14 | 0 | ND |
ppb = parts per billion
All test results
| Date | Result |
|---|---|
| 2014-02-11 | ND |
| 2014-02-11 | ND |
| 2014-02-11 | ND |
| 2014-02-11 | ND |
| 2014-06-02 | ND |
| 2014-06-02 | ND |
| 2014-06-02 | ND |
| 2014-06-02 | ND |
| 2014-08-19 | ND |
| 2014-08-19 | ND |
| 2014-08-19 | ND |
| 2014-08-19 | ND |
| 2014-08-19 | ND |
| 2014-08-19 | ND |
| 2014-08-19 | ND |
| 2014-08-19 | ND |
| 2014-11-18 | ND |
| 2014-11-18 | ND |
| 2014-11-18 | ND |
| 2015-03-16 | ND |
| 2015-03-16 | ND |
| 2015-03-16 | ND |
| 2015-05-13 | ND |
| 2015-05-13 | ND |
| 2015-05-13 | ND |
| 2015-05-13 | ND |
| 2015-05-13 | ND |
| 2015-05-13 | ND |
| 2015-05-13 | ND |
| 2015-05-13 | ND |
| 2015-08-04 | ND |
| 2015-08-04 | ND |
| 2015-08-04 | ND |
| 2015-08-04 | ND |
| 2015-08-04 | ND |
| 2015-08-04 | ND |
| 2015-08-04 | ND |
| 2015-08-04 | ND |
| 2015-10-29 | ND |
| 2015-10-29 | ND |
| 2015-10-29 | ND |
| 2016-03-08 | ND |
| 2016-03-08 | ND |
| 2016-03-08 | ND |
| 2016-03-08 | ND |
| 2016-03-08 | ND |
| 2016-03-08 | ND |
| 2016-03-08 | ND |
| 2016-06-08 | ND |
| 2016-06-08 | ND |
| 2016-06-08 | ND |
| 2016-09-12 | ND |
| 2016-09-12 | ND |
| 2016-09-12 | ND |
| 2016-09-12 | ND |
| 2016-09-12 | ND |
| 2016-09-12 | ND |
| 2016-09-12 | ND |
| 2016-12-08 | ND |
| 2016-12-08 | ND |
| 2016-12-14 | ND |
| 2017-02-15 | ND |
| 2017-02-15 | ND |
| 2017-04-25 | 6.00 ppb |
| 2017-04-25 | 3.00 ppb |
| 2017-12-13 | ND |
| 2017-12-13 | ND |
| 2018-03-16 | ND |
| 2018-03-16 | ND |
| 2018-06-13 | ND |
| 2018-06-13 | ND |
| 2018-06-13 | ND |
| 2018-06-13 | ND |
| 2018-06-13 | ND |
| 2018-06-13 | 1.000 ppb |
| 2018-06-13 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-08-14 | ND |
| 2018-12-12 | 1.000 ppb |
| 2018-12-12 | 2.00 ppb |
| 2019-03-05 | ND |
| 2019-03-05 | ND |
| 2019-04-23 | ND |
| 2019-04-23 | ND |
| 2019-09-19 | ND |
| 2019-09-19 | ND |
| 2019-09-19 | ND |
| 2019-09-19 | ND |
| 2019-09-19 | ND |
| 2019-09-19 | ND |
| 2019-09-19 | ND |
| 2019-09-19 | ND |
| 2019-12-10 | ND |
| 2019-12-10 | ND |