The complexity of the chemical content of today’s household and industrial waste presents a challenge for turning modern waste into energy in (WtE) incinerators. Even with the application of the most developed air pollution control devices (APCD), it is still a huge challenge to eliminate the multitude of persistent organic pollutants (POPs) in waste incinerator residues and flue gases. The dynamics of combustion processes and the inevitable emissions of toxic substances of very high concern (SVHC) into the environment is the main topic of ongoing research of ToxicoWatch. Because of the transboundary behaviour of persistent organic pollutants, international treaties are required to regulate, mitigate or even eliminate toxic chemical emissions. Loopholes still exist in national and international regulations, resulting in an underestimated registration of POPs. Collectif3R ask ToxicoWatch to perform biomonitoring research in Ivry-sur-Seine.