Know Your Environment. Protect Your Health.

Chromium (total)

Clark Public Utilities

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021ND30ND
2022ND140ND
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

Date Lab ID Result
2021-06-294136308ND
2021-06-294136309ND
2021-08-024171193ND
2022-03-314266325ND
2022-07-074329452ND
2022-07-074329454ND
2022-07-074329453ND
2022-07-284328491ND
2022-07-284329448ND
2022-08-034329440ND
2022-08-034329441ND
2022-08-034328492ND
2022-08-044329461ND
2022-08-044329471ND
2022-08-044329468ND
2022-08-044328488ND
2022-08-164364181ND
2023-04-064439682ND
2023-06-014474461ND
2023-09-194531983ND