Silver

Virgin Valley Water District

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.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	6	ND
2015	ND	6	ND
2016	ND	6	ND
2017	ND	6	ND
2018	ND	9	ND
2019	ND	6	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-07-16	1407469-003	ND
2014-07-16	1407469-004	ND
2014-07-16	1407469-005	ND
2014-07-16	1407469-006	ND
2014-07-16	1407469-001	ND
2014-07-16	1407469-002	ND
2015-07-15	1507436-006	ND
2015-07-15	1507436-001	ND
2015-07-15	1507436-005	ND
2015-07-15	15071436-004	ND
2015-07-15	1507436-003	ND
2015-07-15	1507436-002	ND
2016-07-20	1607586-002	ND
2016-07-20	1607586-003	ND
2016-07-20	1607586-004	ND
2016-07-20	1607586-005	ND
2016-07-20	1607586-006	ND
2016-07-20	1607586-001	ND
2017-07-19	1707521-003	ND
2017-07-19	1707521-001	ND
2017-07-19	1707521-006	ND
2017-07-19	1707521-004	ND
2017-07-19	1707521-002	ND
2017-07-19	1707521-005	ND
2018-06-20	1806612-003	ND
2018-06-20	1806612-002	ND
2018-06-20	1806612-001	ND
2018-07-05	1807098-001	ND
2018-07-05	1807098-002	ND
2018-07-05	1807099-001	ND
2018-07-18	1807612-001	ND
2018-07-18	1807612-002	ND
2018-09-19	18090629-001	ND
2019-06-19	19060631-001	ND
2019-06-19	19060631-002	ND
2019-07-01	19070015-001	ND
2019-07-17	19070638-002	ND
2019-07-17	19070638-001	ND
2019-09-25	19090892-001	ND