Before revision: Recreational drugs A study published in 2014 reported a spike in the levels of ecstasy, ketamine, caffeine and acetaminophen in nearby rivers coinciding with a Taiwanese youth event attended by around 600,000 people.
After revision: In groundwaterRecreational drugs A study published in 2014 reported a spike in the levels of ecstasy, ketamine, caffeine and acetaminophen in nearby rivers coinciding with a Taiwanese youth event attended by around 600,000 people.