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EWG's Tap Water Database — 2021 UPDATE

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Silver

Regional Water Authority

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.

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152

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND250ND
2015ND250ND
2016ND260ND
2017ND260ND
2018ND260ND
2019ND240ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-24IOCR 200391476ND
2014-02-24IOCR 200391478ND
2014-02-24IOCR 200391480ND
2014-02-24IOCR 200391481ND
2014-02-24IOCR 200391482ND
2014-02-25IOC1 200391599ND
2014-02-25IOC1 200391600ND
2014-02-25IOC1 200391616ND
2014-02-25IOC1 200391617ND
2014-02-25IOC1 200391618ND
2014-02-25IOC1 200391619ND
2014-02-25IOC1 200391620ND
2014-02-25IOC1 200391653ND
2014-02-25IOCR 200391602ND
2014-02-25IOCR 200391603ND
2014-02-25IOCR 200391621ND
2014-02-25IOCR 200391624ND
2014-02-25IOCR 200391625ND
2014-02-26IOCR 200391727ND
2014-03-18IOCR 200392806ND
2014-05-13IOC1 200395855ND
2014-05-13IOC1 200395860ND
2014-05-13IOCR 200395856ND
2014-05-13IOCR 200395862ND
2014-05-13IOCR 200395863ND
2015-02-09IOCR 200411809ND
2015-02-09IOCR 200411814ND
2015-02-09IOCR 200411810ND
2015-02-09IOCR 200411811ND
2015-02-09IOCR 200411812ND
2015-02-10IOCR 200411877ND
2015-02-10IOC1 200411859ND
2015-02-10IOC1 200411862ND
2015-02-10IOC1 200411860ND
2015-02-10IOC1 200411845ND
2015-02-10IOC1 200411846ND
2015-02-10IOC1 200411863ND
2015-02-10IOC1 200411876ND
2015-02-10IOCR 200411867ND
2015-02-10IOCR 200411866ND
2015-02-10IOCR 200411847ND
2015-02-10IOCR 200411848ND
2015-02-10IOCR 200411864ND
2015-02-11IOCR 200411985ND
2015-05-04IOCR 200415956ND
2015-05-05IOC1 200416148ND
2015-05-05IOC1 200416175ND
2015-05-05IOC1 200416168ND
2015-05-05IOCR 200416169ND
2015-05-05IOCR 200416176ND
2016-02-08IOCR 200433335ND
2016-02-08IOCR 200433340ND
2016-02-08IOCR 200433341ND
2016-02-08IOCR 200433336ND
2016-02-08IOCR 200433338ND
2016-02-09IOCR 200433424ND
2016-02-09IOC1 200433411ND
2016-02-09IOC1 200433414ND
2016-02-09IOC1 200433412ND
2016-02-09IOC1 200433413ND
2016-02-09IOC1 200433479ND
2016-02-09IOC1 200433397ND
2016-02-09IOC1 200433398ND
2016-02-09IOC1 200433415ND
2016-02-09IOC1 200433425ND
2016-02-09IOCR 200433420ND
2016-02-09IOCR 200433419ND
2016-02-09IOCR 200433418ND
2016-02-09IOCR 200433480ND
2016-02-09IOCR 200433399ND
2016-02-09IOCR 200433400ND
2016-02-09IOCR 200433416ND
2016-02-10IOCR 200433549ND
2016-05-12IOC1 200439513ND
2016-05-12IOCR 200439514ND
2016-11-22IOCR 200455269ND
2017-03-20IOCR 200462640ND
2017-03-20IOCR 200462646ND
2017-03-20IOCR 200462641ND
2017-03-20IOCR 200462642ND
2017-03-20IOCR 200462645ND
2017-03-21IOCR 200462775ND
2017-03-21IOC1 200462739ND
2017-03-21IOC1 200462742ND
2017-03-21IOC1 200462740ND
2017-03-21IOC1 200462741ND
2017-03-21IOC1 200462793ND
2017-03-21IOC1 200462756ND
2017-03-21IOC1 200462757ND
2017-03-21IOC1 200462743ND
2017-03-21IOC1 200462777ND
2017-03-21IOCR 200462833ND
2017-03-21IOCR 200462764ND
2017-03-21IOCR 200462794ND
2017-03-21IOCR 200462758ND
2017-03-21IOCR 200462759ND
2017-03-21IOCR 200462744ND
2017-06-19IOCR 200469686ND
2017-06-20IOC1 200469812ND
2017-06-20IOC1 200469827ND
2017-06-20IOCR 200469828ND
2017-06-20IOCR 200469813ND
2018-03-12IOC1 200489766ND
2018-03-12IOCR 200489760ND
2018-03-12IOCR 200489758ND
2018-03-12IOCR 200489759ND
2018-03-12IOCR 200489767ND
2018-03-14IOCR 200489911ND
2018-03-14IOC1 200489867ND
2018-03-14IOC1 200489870ND
2018-03-14IOC1 200489868ND
2018-03-14IOC1 200489884ND
2018-03-14IOC1 200489885ND
2018-03-14IOC1 200489871ND
2018-03-14IOC1 200489913ND
2018-03-14IOC1 200489914ND
2018-03-14IOCR 200489898ND
2018-03-14IOCR 200489900ND
2018-03-14IOCR 200489896ND
2018-03-14IOCR 200489912ND
2018-03-14IOCR 200489886ND
2018-03-14IOCR 200489887ND
2018-03-14IOCR 200489872ND
2018-03-14IOCR 200489897ND
2018-03-15IOCR 200490062ND
2018-03-15IOCR 200490063ND
2018-11-29IOC1 200514112ND
2018-11-29IOCR 200514114ND
2019-03-18IOC1 200524895ND
2019-03-18IOCR 200524896ND
2019-03-18IOCR 200524903ND
2019-03-18IOCR 200524901ND
2019-03-18IOCR 200524902ND
2019-03-18IOCR 200524905ND
2019-03-18IOCR 200524900ND
2019-03-19IOCR 200525095ND
2019-03-19IOC1 200525057ND
2019-03-19IOC1 200525060ND
2019-03-19IOC1 200525058ND
2019-03-19IOC1 200525059ND
2019-03-19IOC1 200525077ND
2019-03-19IOC1 200525078ND
2019-03-19IOC1 200525061ND
2019-03-19IOC1 200525097ND
2019-03-19IOC1 200525098ND
2019-03-19IOCR 200525065ND
2019-03-19IOCR 200525066ND
2019-03-19IOCR 200525064ND
2019-03-19IOCR 200525096ND
2019-03-19IOCR 200525079ND
2019-03-19IOCR 200525080ND
2019-03-19IOCR 200525062ND