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EWG's Tap Water Database — 2021 UPDATE

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Silver

Placer County Water Agency - Foothill

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
2014ND20ND
2015ND20ND
2016ND40ND
2017ND40ND
20180.653 ppb32ND - 1.23 ppb
2019ND30ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-08-203334-007-1200ND
2014-08-203334-002-1010ND
2015-08-113334-002-1000ND
2015-08-113334-007-1305ND
2016-03-302113-014-1440ND
2016-08-032113-014-1045ND
2016-08-172113-002-1215ND
2016-08-172113-007-0945ND
2017-08-081233-007-0900ND
2017-08-081233-002-1120ND
2017-08-221233-014-1040ND
2017-08-227473-014-1040ND
2018-08-147473-007-1310ND
2018-08-147473-002-11201.23 ppb
2018-08-227473-014-09300.730 ppb
2019-08-277473-002-1135ND
2019-09-097473-007-1330ND
2019-09-127473-014-1150ND