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EWG's Tap Water Database — 2019 UPDATE

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Silver

City of Hereford

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
2012N/A00N/A
2013N/A00N/A
2014ND10ND
2015N/A00N/A
2016ND30ND
2017ND30ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-12Q1404321008ND
2016-02-10Q1605969007ND
2016-02-10Q1605969008ND
2016-03-17Q1611196007ND
2017-01-17Q1702053008ND
2017-04-10Q1714723004ND
2017-05-09Q1718998004ND