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EWG's Tap Water Database — 2019 UPDATE

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Silver

City of Hollister

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND60ND
2015ND50ND
2016N/A00N/A
2017ND50ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-06-121610-009-1055ND
2014-06-121610-007-1250ND
2014-06-121610-006-1315ND
2014-06-121610-005-1015ND
2014-06-121610-002-1145ND
2014-06-121610-001-1205ND
2015-09-161610-009-1150ND
2015-09-161610-001-1035ND
2015-09-161610-007-0900ND
2015-09-161610-006-0914ND
2015-09-161610-005-0847ND
2017-06-011610-002-1045ND
2017-06-011610-001-1011ND
2017-06-081610-006-1236ND
2017-06-081610-005-1150ND
2017-06-081610-007-0916ND