Know Your Environment. Protect Your Health.

Chromium (total)

City of The Dalles

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND40ND
2021ND40ND
2022ND40ND
2023ND40ND

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
2018-08-16V8H037502ND
2018-08-16V8H037501ND
2018-08-16V8H037503ND
2019-08-14B9H225804-IND
2019-08-14B9H225805-IND
2019-08-14B9H225806-IND
2020-08-11VDH027404-IND
2020-08-11VDH027401-IND
2020-08-11VDH027403-IND
2020-08-11VDH027402-IND
2021-08-18202108190356-IND
2021-08-18202108190366-IND
2021-08-18202108190355-IND
2021-08-18202108190365-IND
2022-08-09380-15716-2-IND
2022-08-09380-15716-3-IND
2022-08-09380-15716-4-IND
2022-08-09380-15716-1-IND
2023-08-02VGH0105-03-IND
2023-08-02VGH0105-01-IND
2023-08-02VGH0105-02-IND
2023-08-02VGH0105-04-IND