Don't Sniff the Water

In Italy, the water is staggeringly polluted. With cocaine. People living around the Po Valley in northern Italy consume about 15,000 doses of cocaine a month, according to all the benzoylecgonine in their piss contaminating the rivers.

The large amount of cocaine (at least 1,500 kg/3,307lb) that our findings suggest are consumed per year in the River Po basin would amount... to about $150m (£84m) in street value," the scientists wrote in the journal.

BBC News: Italian river 'full of cocaine