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EWG's Tap Water Database — 2021 UPDATE

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Silver

Fort Polk South Water System

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015ND120ND
2016N/A00N/A
2017N/A00N/A
2018ND120ND
2019N/A00N/A

ppb = parts per billion

All test results

Date Lab ID Result
2015-07-2835199572005ND
2015-07-2835199572001ND
2015-07-2835199572002ND
2015-07-2835199572003ND
2015-07-2835199572005ND
2015-07-2835199572004ND
2015-07-2835199572003ND
2015-07-2835199572002ND
2015-07-2835199572001ND
2015-07-2835199572004ND
2015-11-0935216622001ND
2015-11-0935216622001ND
2018-09-1135417514003ND
2018-09-1135417514002ND
2018-09-1135417514001ND
2018-09-1135417514001ND
2018-09-1135417514002ND
2018-09-1135417514003ND
2018-09-1335417861001ND
2018-09-1335417861003ND
2018-09-1335417861002ND
2018-09-1335417861001ND
2018-09-1335417861003ND
2018-09-1335417861002ND