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EWG's Tap Water Database — 2019 UPDATE

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Silver

City of Ripon

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND30ND
2014ND10ND
2015ND20ND
2016ND30ND
2017ND30ND

ppb = parts per billion

All test results

Date Lab ID Result
2012-06-132625-007-0927ND
2012-06-132625-003-0725ND
2013-06-262625-010-1425ND
2013-10-292625-020-0935ND
2013-11-052625-024-0810ND
2014-06-052625-022-1405ND
2015-01-222625-003-0930ND
2015-06-082625-007-0955ND
2016-06-152625-010-0820ND
2016-10-202625-020-1045ND
2016-11-022625-024-1000ND
2017-06-142625-010-0930ND
2017-10-242625-020-1020ND
2017-11-152625-024-0924ND