Abstract: This report presents a number of contributions that relate to analysing communal wastewaters for drugs and their metabolic products in order to estimate their consumption in the community. This area of work is developing in a multidisciplinary fashion, involving scientists working in different research areas. For this reason, the contributions to this publication come from a variety of different perspectives including: analytical chemistry, physiology and biochemistry, sewage engineering, spatial epidemiology and statistics, and conventional drug epidemiology.