Know Your Environment. Protect Your Health.

Chromium (total)

Western Cass Water Supply Corporation

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
20190.400 ppb31ND - 1.20 ppb
2020ND10ND
20210.750 ppb21ND - 1.50 ppb
2022ND30ND
20238.50 ppb118.50 ppb

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
2018-03-08Q1809687016ND
2018-03-08Q1809687017ND
2019-05-02Q1918236012ND
2019-05-02Q19182360131.20 ppb
2019-05-02Q1918236014ND
2020-03-19Q2011997016ND
2021-10-25Q21299110201.50 ppb
2021-10-25Q2129911027ND
2022-04-14Q2211593001ND
2022-04-14Q2211593002ND
2022-11-16Q2234548004ND
2023-08-01Q23311110118.50 ppb