Know Your Environment. Protect Your Health.

Chromium (total)

Osborne County Rural Water District 1a

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.

 

5

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.20 ppb222.00 ppb - 2.40 ppb
2019N/A00N/A
2020N/A00N/A
2021ND20ND
20221.10 ppb111.10 ppb
2023N/A00N/A

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
2018-01-239073952.40 ppb
2018-01-239073962.00 ppb
2021-01-031729416ND
2021-01-031729417ND
2022-04-2522438461.10 ppb