Silver

West Hempstead WD

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	5	ND
2015	ND	5	ND
2016	ND	7	ND
2017	ND	6	ND
2018	ND	7	ND
2019	ND	6	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-07-16	1407B62-002-SEC	ND
2014-07-16	1407B62-001-SEC	ND
2014-08-14	1408A43-003-SEC	ND
2014-08-14	1408A43-001-SEC	ND
2014-08-14	1408A43-002-SEC	ND
2015-02-04	1502239-002-SEC	ND
2015-02-04	1502239-001-SEC	ND
2015-02-05	1502278-002-SEC	ND
2015-02-05	1502278-001-SEC	ND
2015-07-30	1507M16-001-SEC	ND
2016-05-04	160533-002-SEC	ND
2016-05-04	16053330-003-SEC	ND
2016-05-04	1605330-001-SEC	ND
2016-05-12	1605B21-004-SEC	ND
2016-05-12	1605B21-003-SEC	ND
2016-05-19	160I21-004-SEC	ND
2016-07-20	1607H26-001-SEC	ND
2017-05-03	7017655004-SEC	ND
2017-05-03	7017655002-SEC	ND
2017-05-03	7017655001-SEC	ND
2017-05-03	7017655003-SEC	ND
2017-06-14	7021351002-SEC	ND
2017-06-14	7021351001-SEC	ND
2018-02-02	7041958005	ND
2018-02-02	7041958002-SEC	ND
2018-02-02	7041958006-SEC	ND
2018-02-02	7041958001	ND
2018-02-02	7041958004	ND
2018-02-02	7041958003-SEC	ND
2018-12-21	7074695001-SEC	ND
2019-04-10	7085363003-SEC	ND
2019-04-10	7085363005-SEC	ND
2019-04-10	7085363002-SEC	ND
2019-04-10	7085363001-SEC	ND
2019-04-10	7085363004-SEC	ND
2019-04-10	7085363006-SEC	ND