Know Your Environment. Protect Your Health.

Chromium (total)

Town of Oakland

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND20ND
2020ND40ND
2021ND40ND
2022ND50ND
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
2018-05-10E18004082004ND
2018-05-10E18004082003ND
2018-10-1564637ND
2018-10-1864636ND
2019-08-1967330ND
2019-08-1967331ND
2020-06-02E20003710003ND
2020-06-23E20003926003ND
2020-09-0270323ND
2020-09-0270324ND
2021-06-08E21003620003ND
2021-06-08E21003620004ND
2021-09-1473451ND
2021-09-1473452ND
2022-06-09E2201076701ND
2022-06-09E2201076704ND
2022-07-2876283ND
2022-07-2876284ND
2022-07-2878597ND
2023-04-1878596ND
2023-04-1878597-AND