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 related to drinking water:
“When drinking water, don’t forget those who dug the well.”
—Chinese proverb.
“When drinking water, think of its source.”
—Chinese proverb.