Know Your Environment. Protect Your Health.

Chromium (total)

Highridge Water Authority

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
2018ND20ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND20ND
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
2018-03-287046769001ND
2018-03-287046769002ND
2019-03-057081621001ND
2019-03-057081621002ND
2020-02-1121769403.00ND
2020-02-1121769415.00ND
2021-01-1323814201.00ND
2021-01-1323814213.00ND
2022-03-1526388668.00ND
2022-03-1526388680.00ND
2023-05-1629019087.00ND
2023-05-1629019099.00ND