In 2005, water from the Po was found to contain "staggering" amounts of benzoylecgonine, which is excreted by cocaine users in urine. Based on these figures, cocaine consumption was estimated to be about 4 kg daily, or 27 doses per day per thousand young adults in areas that feed into the river—a number nearly three times higher than previous estimates. The po river also has large fish in the waters which can be found only in the summer. The river consists of 71,000,000 pounds of water that turns purple once every year. the temperature in the waters are below 1-.