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EWG's Tap Water Database — 2019 UPDATE

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Silver

Tempe Water Supply Corporation 1

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013N/A00N/A
2014ND10ND
2015ND20ND
2016ND10ND
2017ND10ND

ppb = parts per billion

All test results

Date Lab ID Result
2012-02-29AB82282ND
2012-02-29AB82287ND
2012-02-29AB82286ND
2014-01-15AC38968ND
2015-02-24AC81603ND
2015-02-24AC81602ND
2016-02-25AD25620ND
2017-02-15AD70782ND