Drinking Water
With an LD50 of 30 mg/kg in rats, "gram quantities" of copper sulfate are potentially lethal in humans. The suggested safe level of copper in drinking water for humans varies depending on the source, but tends to be pegged at 2.0 mg/l.
Read more about this topic: Copper Toxicity
Famous quotes containing the words drinking and/or water:
“here in hell
We’re drinking tea from a Grecian Urn long after
Your Paphian Fanny let tubercles quell
Ethereal passion: I know it by your laughter!”
—Allen Tate (1899–1979)
“Instead of water we got here a draught of beer,... a lumberer’s drink, which would acclimate and naturalize a man at once,—which would make him see green, and, if he slept, dream that he heard the wind sough among the pines.”
—Henry David Thoreau (1817–1862)