A new report from Aarhus University reveals Danes’ use of drugs and alcohol based on wastewater analysis in six cities. The study found significant differences in opioid consumption between cities and showed that cocaine, MDMA, and alcohol use spike on weekends. Most other substances are used steadily throughout the week. The findings provide a unique insight into actual drug habits and may help guide future public health efforts.

Copenhagen mayor criticizes slow response to youth opioid use as new study shows a rise in experimentation among young people in the city.