Know Your Environment. Protect Your Health.

Silver

Bonney Lake Water Department

NOTE: Bonney Lake Water Department purchases water from City of Tacoma which is required to test for silver. Sample information shown below was taken by 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
2018ND40ND
2019ND40ND
2020N/A00N/A
2021ND40ND
2022ND80ND
2023ND30ND

ppb = parts per billion

All test results

NOTE: Bonney Lake Water Department purchases water from City of Tacoma which is required to test for silver. Sample information shown below was taken by City of Tacoma.

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