Silver

City of Turlock

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	2	ND
2015	ND	8	ND
2016	ND	9	ND
2017	ND	3	ND
2018	ND	7	ND
2019	ND	8	ND

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-04-02	1120-040-1015	ND
2014-07-09	1120-029-0822	ND
2015-04-06	1120-004-1000	ND
2015-04-06	1120-008-1048	ND
2015-04-06	1120-014-1120	ND
2015-04-21	1120-034-1110	ND
2015-04-23	1120-030-1300	ND
2015-04-29	1120-035-1100	ND
2015-06-15	1120-022-0807	ND
2015-07-06	1120-036-1235	ND
2016-02-22	1120-003-0810	ND
2016-03-07	1120-020-1050	ND
2016-05-11	1120-019-0933	ND
2016-05-16	1120-037-1415	ND
2016-05-19	1120-013-0906	ND
2016-06-08	1120-015-0840	ND
2016-06-21	1120-027-0810	ND
2016-07-20	1120-033-0814	ND
2016-07-21	1120-039-1302	ND
2017-04-17	1120-040-1140	ND
2017-07-11	1120-029-0915	ND
2017-07-11	1120-032-1000	ND
2018-04-03	1120-030-0850	ND
2018-04-03	1120-004-0915	ND
2018-04-10	1120-034-0832	ND
2018-04-11	1120-008-1035	ND
2018-04-23	1120-035-0800	ND
2018-06-13	1120-022-0724	ND
2018-07-12	1120-036-1040	ND
2019-03-04	1120-020-1443	ND
2019-05-06	1120-037-0800	ND
2019-05-06	1120-013-0850	ND
2019-06-11	1120-027-0930	ND
2019-06-11	1120-015-0750	ND
2019-07-09	1120-033-0901	ND
2019-07-09	1120-039-1127	ND
2019-09-10	1120-003-0939	ND