Public authorities are highly concerned about the presence of micropollutants in the sewage system, which is partly due to the spillage of some polluting products. Wastewater treatment plants have nowadays more difficulty to treat wastewater properly. Damages on ecosystem and human health are one of the major consequences of this deficiency. It seems that an important part of polluting spillage results from domestic use. In this context, it seems to be necessary to lower and/or to enhance all domestic discharges. The first step is to understand/analyze the individuals’ representation of micropollutants in order to propose concrete measures to change their behaviors. 605 questionnaires were completed by the inhabitants of Strasbourg Eurometropole (East of France). The results show that individuals are aware that the presence of micropollutants in water can be linked to individual practices. It also seems to be difficult for the respondents to think that everyday products, in particular those related to body treatment, may have an impact on water quality. Nevertheless, the majority of the respondents remain convinced that the industrials are the first responsible.