Know Your Environment. Protect Your Health.

Chromium (total)

Lockport Heights SD

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.

 

0

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.77 ppb31ND - 5.32 ppb
201915.0 ppb227.61 ppb - 22.4 ppb
2020ND10ND
20218.29 ppb335.97 ppb - 10.7 ppb
20229.29 ppb336.87 ppb - 10.9 ppb
20235.75 ppb333.05 ppb - 8.02 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