Paying attention to the ethical and confidentiality issues, gaining and learning about lifestyle habits is through wastewater monitoring. Good information can be obtained by consciously choosing a reflection of the population spread over different neighbourhoods. The presence or absence of medicines, oils and fats, soft drugs, wipes, etc. give an idea of the living habits in the various neighbourhoods. ✘ Socio-spatial inequality ✘ Functioning of the sewage system ✘ Supervision of the sewage system ✘ Uncertainties in the understanding of the relationship between social/environmental/health The implementation of such a monitoring network could help administrations and health centers to have more knowledge about the lifestyle of the population, so that healthier habits and more environmentally friendly behaviors can be promoted. In this approach, workshops at schools or community centers can be promoted as a means to promote more environmentally friendly manners. ✔ Reduction of socio-spatial inequalities ✔ Improving public health ✔ A more informed society about environmental and health issues ✔ Communication campaigns ✔ Support in the allocation of public funds