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EWG's Tap Water Database — 2019 UPDATE

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Silver

City of South Houston

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.

 

10

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
2014ND50ND
2015N/A00N/A
2016N/A00N/A
2017ND50ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-14AC38725ND
2014-01-14AC38739ND
2014-01-14AC38729ND
2014-01-14AC38726ND
2014-01-14AC38740ND
2017-01-06AD63508ND
2017-02-10AD70297ND
2017-03-01AD72706ND
2017-03-01AD72711ND
2017-03-01AD72710ND