Know Your Environment. Protect Your Health.

Silver

City of Tacoma

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020N/A00N/A
2021ND60ND
2022ND80ND
2023ND30ND

ppb = parts per billion

All test results

Date Lab ID Result
2018-10-18ND
2019-12-05ND
2021-06-214136300ND
2021-06-214136298ND
2021-06-214136297ND
2021-06-214136296ND
2021-06-304143413ND
2021-07-214159325ND
2022-09-154371197ND
2022-10-114371889ND
2022-11-154384533ND
2022-12-274400688ND
2022-12-274400688ND
2022-12-274400688ND
2022-12-274400688ND
2022-12-274400688ND
2023-07-124499689ND
2023-07-124499687ND
2023-10-204549137ND