Levels in drinking water set by EPAThe EPA has established a maximum contaminant level of 0.1 mg/L for total chromium in drinking water. EPA currently seeks voluntary monitoring of hexavalent chromium in drinking water by municipalities. However, it is reviewing health effects data of hexavalent chromium and may set limits on its levels in drinking water in the future.
Levels in bottled water set by FDAThe FDA has determined that the chromium concentration in bottled drinking water should not exceed 0.1 mg/L.
Levels in workplace air set by OSHAOSHA set a legal limit for chromium(VI) of 0.005 mg/m3 chromium in air averaged over an 8-hour work day, for chromium(III) of 0.5 mg/m3 chromium in air averaged over an 8-hour work day, and for chromium(0) of 1.0 mg/m3 chromium in air averaged over an 8-hour work day.
Levels in workplace air set by NIOSHNIOSH recommends an exposure limit of 0.5 mg/m3 chromium as chromium metal and chromium(II) and chromium(III) compounds in air averaged over an 8-hour work day. NIOSH also recommends an exposure limit of 0.001 mg/m3 for chromium(VI) compounds in air averaged over 10-hour work day.

From: 1, PUBLIC HEALTH STATEMENT

Cover of Toxicological Profile for Chromium
Toxicological Profile for Chromium.
Wilbur S, Abadin H, Fay M, et al.

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