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EWG's Tap Water Database — 2019 UPDATE

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Silver

Carroll-Boone 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
2012ND10ND
2013ND10ND
2014ND10ND
2015ND10ND
2016ND10ND
2017ND10ND

ppb = parts per billion

All test results

Date Lab ID Result
2012-04-18121110003ND
2013-04-09131020003ND
2014-04-07141000029ND
2015-05-12Y151350001ND
2016-04-19Y161120013ND
2017-04-27Y171180007ND