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EWG's Tap Water Database — 2019 UPDATE

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Silver

San Antonio Water System Northeast

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.

 

4

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
2013ND10ND
2014N/A00N/A
2015ND30ND
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

All test results

Date Lab ID Result
2013-11-21AC35814ND
2015-07-08AC98680ND
2015-07-08AC98675ND
2015-07-09AC98917ND