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EWG's Tap Water Database — 2019 UPDATE

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Silver

City of Kerrville

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND10ND
2014ND10ND
2015ND10ND
2016ND60ND
2017ND80ND

ppb = parts per billion

All test results

Date Lab ID Result
2012-10-041210228003ND
2013-07-29AC25998ND
2014-02-10AC41871ND
2015-01-28AC78082ND
2016-02-01AD20978ND
2016-02-01AD20973ND
2016-04-18AD33309ND
2016-07-05AD42869ND
2016-10-24AD54249ND
2016-10-24AD54250ND
2017-02-13AD70299ND
2017-04-06AD78702ND
2017-05-08AD82958ND
2017-05-08AD82960ND
2017-05-08AD82959ND
2017-05-09AD83256ND
2017-05-09AD83251ND
2017-05-09AD83255ND