Know Your Environment. Protect Your Health.

Chromium (total)

Colorado City Md

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
2018ND30ND
20190.265 ppb220.260 ppb - 0.270 ppb
2020ND20ND
2021ND20ND
20220.660 ppb110.660 ppb
20233.50 ppb222.00 ppb - 5.00 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 Result
2018-01-17ND
2018-01-17ND
2018-04-24ND
2019-01-290.270 ppb
2019-01-290.260 ppb
2020-01-14ND
2020-01-14ND
2021-11-10ND
2021-11-10ND
2022-02-230.660 ppb
2023-09-265.00 ppb
2023-10-022.00 ppb