Know Your Environment. Protect Your Health.

Chromium (total)

Columbia Water Company

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
2019ND10ND
2020ND10ND
2021ND30ND
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
2018-03-132301725001ND
2018-04-022306478001ND
2018-04-182310012001ND
2019-04-019040045-01ND
2020-04-1322172755.00ND
2021-04-0524395251.00ND
2021-04-0524395141.00ND
2021-04-1224395153.00ND
2022-04-1126608830.00ND
2022-04-1326608844.00ND
2023-03-0628662952.00ND
2023-04-1728859589.00ND