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EWG's Tap Water Database — 2019 UPDATE

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Silver

Harris County MUD 165

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.

 

5

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
2013ND20ND
2014N/A00N/A
2015N/A00N/A
2016ND30ND
2017N/A00N/A

ppb = parts per billion

All test results

Date Lab ID Result
2013-06-13AC21984ND
2013-06-13AC21987ND
2016-03-21AD29548ND
2016-03-21AD29547ND
2016-03-21AD29549ND