Know Your Environment. Protect Your Health.

Chromium (total)

Kent Water Department

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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND100ND
2020N/A00N/A
20210.317 ppb95ND - 0.630 ppb
2022ND30ND
2023ND40ND

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

Date Lab ID Result
2018-07-16ND
2018-07-16ND
2018-07-17ND
2018-08-07ND
2018-08-07ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-12ND
2019-07-12ND
2019-07-16ND
2019-07-16ND
2019-07-22ND
2019-07-22ND
2019-07-23ND
2021-06-2341808000.600 ppb
2021-06-2341808000.600 ppb
2021-07-1342128890.630 ppb
2021-07-134212890ND
2021-07-134212890ND
2021-07-134212888ND
2021-07-2042001530.510 ppb
2021-07-2042001530.510 ppb
2021-07-274203566ND
2022-07-264329412ND
2022-07-264329409ND
2022-07-264329405ND
2023-07-314511171ND
2023-07-314511172ND
2023-07-314511170ND
2023-07-314511173ND