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EWG's Tap Water Database — 2019 UPDATE

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Silver

Massachusetts Water Resources Authority (MWRA)

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.250 ppb81ND - 2.00 ppb
2013ND80ND
2014ND80ND
2015ND80ND
2016ND80ND
2017ND80ND

ppb = parts per billion

All test results

Date Result
2012-01-092.00 ppb
2012-01-10ND
2012-04-02ND
2012-04-02ND
2012-07-09ND
2012-07-10ND
2012-10-01ND
2012-10-02ND
2013-01-07ND
2013-01-08ND
2013-04-01ND
2013-04-02ND
2013-07-09ND
2013-07-09ND
2013-10-07ND
2013-10-08ND
2014-01-06ND
2014-01-07ND
2014-04-07ND
2014-04-07ND
2014-07-07ND
2014-07-08ND
2014-10-06ND
2014-10-07ND
2015-01-05ND
2015-01-06ND
2015-04-06ND
2015-04-07ND
2015-07-06ND
2015-07-07ND
2015-10-06ND
2015-10-06ND
2016-01-05ND
2016-01-05ND
2016-04-05ND
2016-04-05ND
2016-07-05ND
2016-07-05ND
2016-10-04ND
2016-10-04ND
2017-01-03ND
2017-01-03ND
2017-04-04ND
2017-04-04ND
2017-07-11ND
2017-07-11ND
2017-10-03ND
2017-10-03ND