Occurrence of Chromium in Drinking Water, Food, and Air.
Chromium is a hard steel gray metal that takes on a high polish. Chromium has two important valence states: trivalent (+3) and hexavalent (+6). Trivalent chromium compounds are the most common. Natural hexavalent chromium compounds are rare; however, hexavalent forms can be found in the environment as a result of industrial wastes. The presence of chromium in drinking water, food, and air results from both natural and anthropogenic sources.
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