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EWG's Tap Water Database

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Silver

La Puente Valley County Water District

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND10ND
2011ND10ND
2012ND10ND
2013ND20ND
2014N/A00N/A
2015ND10ND

ppb = parts per billion.

All test results

Date Lab ID Result
2010-03-089588-013-0830ND
2011-12-309588-013-1400ND
2012-10-259588-013-1426ND
2013-07-259588-013-1645ND
2013-07-269588-013-1430ND
2015-07-299588-013-1237ND