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 water, drinking and/or water:
“When drinking water, think of its source.”
—Chinese proverb.
“The task he undertakes
Is numbering sands and drinking oceans dry.”
—William Shakespeare (1564–1616)
“Talk of a divinity in man! Look at the teamster on the highway, wending to market by day or night; does any divinity stir within him? His highest duty to fodder and water his horses! What is his destiny to him compared with the shipping interests?”
—Henry David Thoreau (1817–1862)