Know Your Environment. Protect Your Health.

Chromium (total)

Bonney Lake Water Department

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

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

 

18

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

State, National, and Health Guidelines for Drinking Water

EPA Maximum Contaminant
Level (MCL): 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

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

Date Lab ID Result
2019-12-05ND
2021-06-214136300ND
2021-06-214136298ND
2021-06-214136296ND
2021-06-214136297ND
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