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EWG's Tap Water Database — 2019 UPDATE

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Silver

Grayson Utility Commission

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201210.00 ppb1110.00 ppb
2013ND10ND
2014ND10ND
2015ND20ND
2016ND10ND
2017ND10ND

ppb = parts per billion

All test results

Date Lab ID Result
2012-03-1320120296300110.00 ppb
2013-03-19201303442001ND
2014-03-04201403039001ND
2015-03-0320182504001ND
2015-03-03201502504001ND
2016-03-08201603304001ND
2017-03-07201703210001ND