Know Your Environment. Protect Your Health.

Chromium (total)

City of Rexburg

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019N/A00N/A
2020ND20ND
2021ND20ND
2022ND50ND
2023ND20ND

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
2018-06-29IB18070188001ND
2018-06-29IB18070177001ND
2018-08-01I1813261ND
2020-06-29IB20070003001ND
2020-06-29IB20062582003ND
2021-04-01IB21040627004ND
2021-04-01IB21040627003ND
2022-06-27IB22062447001ND
2022-06-27IB22062447002ND
2022-06-27IB22062447007ND
2022-06-27IB22062447008ND
2022-06-27IB22062447009ND
2023-06-14IMDF068706ND
2023-06-14IMDF068707ND