A study published by the European Union Drugs Agency (EUDA) has found an overall increase in the levels of ketamine and cocaine in wastewater and decreases in traces of ecstasy in cities all over Europe.
Ketamine levels in Dublin increased by over 40%, cannabis was up over 8%, but the levels of cocaine and ecstasy in wastewater were each down by over 20%.
The study analysed daily wastewater samples in the catchment areas of wastewater treatment plants over a one-week period between March and May 2025.
The analysis in Dublin was carried out on wastewater from the Ringsend treatment plant in Dublin.
Wastewater samples from a population of 72 million people…