International audience ; According to the USEPA, nonpoint source pollution (NPS) generally results from land runoff, precipitation, atmospheric deposition, drainage… NPS pollution, unlike pollution from industrial and sewage treatment plants, comes from many sources. Besides, non-point sources of pollution are often termed 'diffuse' pollution and are often associated with particular land uses, as opposed to individual point source discharges. However, such a definition is a general one. Another way to consider the spread of diffuse pollution is to consider the use of human-made products. Indeed, exposure to micropollutants (MPs) is mainly due to the use of marketed products since more than 10,000 organic chemicals such as pharmaceuticals, ingredients of personal care products and biocides are ubiquitously used in everyday life (Wick 2010). Companies which manufacture, import or sell those marketed products contribute to the MP dissemination. As a consequence this study was conducted according to complementary approaches at the scale of the Paris conurbation. The main idea was to determine the MP sources: do they originate from domestic or industrial sources or both? To provide answers, the study followed two stages. The first one consisted in the comparison between the industrial and domestic discharges of alkylphenols (APs) and phthalates (PAEs) to the sewer network (Bergé et al. 2014). A total of 45 domestic samples as well as 101 industrial samples were collected from different sites, including 14 residential and 33 industrial facilities. The main findings of these early works were of prime interest for organizations in charge of the monitoring of industrial discharges. It has been highlighted that APs and PAEs are not rejected by the industry but originate from domestic wastewater: less than 5% of the load derived from industrial wastewater (Bergé et al., 2014). Hence, reducing industrial releases is not sufficient to decrease the AP and PAE loads to wastewater in urban areas. Therefore, the second stage ...