Project that tested traces of illicit drugs in wastewater also found higher use during Eurovision song contest Project that tested traces of illicit drugs in wastewater also found higher use during Eurovision song contest Traces of illicit drugs in wastewater in England show spikes in usage during bank holiday weekends, heatwaves and sports events, while the Eurovision song contest ranks as one of the most drug-fuelled nights of the year. Tests at water treatment plants across the country found