Silver

Missouri American St. Louis County & St. Charles County

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
2013	N/A	0	N/A
2014	ND	15	ND
2015	ND	5	ND
2016	ND	5	ND
2017	ND	5	ND
2018	ND	5	ND
2019	ND	5	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-04-15	25144101	ND
2014-04-15	25143201	ND
2014-04-15	25144401	ND
2014-04-16	25141401	ND
2014-04-16	25142301	ND
2014-07-23	AC29362	ND
2014-07-23	AC29365	ND
2014-07-23	AC29364	ND
2014-07-23	AC29363	ND
2014-07-23	AC29361	ND
2014-07-23	26417901	ND
2014-07-23	26417801	ND
2014-07-23	26417701	ND
2014-07-23	26417601	ND
2014-07-23	26417501	ND
2015-04-22	28625601	ND
2015-04-22	28624701	ND
2015-04-22	28626501	ND
2015-04-22	28627401	ND
2015-04-22	28627701	ND
2016-04-05	31777301	ND
2016-04-05	31776301	ND
2016-04-20	31778301	ND
2016-04-20	31779301	ND
2016-04-20	31779601	ND
2017-04-11	35123001	ND
2017-04-11	35121701	ND
2017-04-11	35122701	ND
2017-04-19	35119701	ND
2017-04-19	35120701	ND
2018-04-06	39051501	ND
2018-04-06	39052401	ND
2018-04-16	39053301	ND
2018-04-16	39054201	ND
2018-04-16	39054501	ND
2019-04-08	43597901	ND
2019-04-08	43598401	ND
2019-04-09	43599301	ND
2019-04-09	43600201	ND
2019-04-09	43600301	ND