Know Your Environment. Protect Your Health.

Chromium (total)

Madison Service District

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.

 

3

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201813.0 ppb1113.0 ppb
201913.0 ppb1113.0 ppb
2020N/A00N/A
2021N/A00N/A
202211.0 ppb1111.0 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
2018-01-30CA5700571_011_011-20180130093013.0 ppb
2019-08-29CA5700571_012_012-20190829080013.0 ppb
2022-08-30CA5700571_012_012-20220830083011.0 ppb