Know Your Environment. Protect Your Health.

Chromium (total)

Southern Madison Utilities LLC

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND10ND
2020ND10ND
2021ND20ND
20222.28 ppb112.28 ppb
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
2018-05-1518071702IOC-2018ND
2018-08-1418127709ND
2019-05-1419092611ND
2020-08-11201579-07IOCND
2021-05-11210836-08IOCND
2021-08-10211507-10IOCND
2022-05-10220873-04IOC2.28 ppb
2023-08-15231719-08IOCND
2023-08-15231719-08IOC2ND