Know Your Environment. Protect Your Health.

Chromium (total)

Hca Roan Filter Plant

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND20ND
2021ND40ND
2022ND10ND
2023ND50ND

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
2018-08-16AA91020ND
2019-07-22AA97892ND
2020-06-0422436104.00ND
2020-10-1923201753.00ND
2021-01-0723731022.00ND
2021-04-0824266627.00ND
2021-07-0124848240.00ND
2021-07-2124848433.00ND
2022-08-1727255200.00ND
2023-02-2828541406.00ND
2023-05-0228921456.00ND
2023-07-2429320799.00ND
2023-08-2229719373.00ND
2023-11-1430089942.00ND