Abstract
Like other communes in French Guiana, the commune of Saint-Georges de l'Oyapock is subjected each year to natural pollutants (e.g. Saharan dust, Prospero et al. 1981) and to anthropogenic pollutants (e.g. benzene).Given that the measuring stations of PM10, PM2.5, nitrogen oxide and benzene belonging to ATMO GUYANE currently exist only on Cayenne, Matoury and Kourou, a preliminary study had to be carried out here for desert aerosols at first, then for benzene. In the case of desert aerosols, a first work on the search for correlation between ground data collected by Thermo Scientific Tapered Element Oscillating Microbalance (TEOM) and optical thickness data (AOT) from satellite VIIRS images was carried out. In the case of benzene, the very first measurement campaign was carried out at the end of June 2021 just before the closing of schools. For the OHM Oyapock, establishing a recurrent benzene measurement campaign over the medium term would be a tool to evaluate internal mobilities in Saint-Georges and Oiapoque as well as cross-border mobilities inherent to the opening of the bridge. The results will be presented here but it will be necessary to repeat this campaign in full school period. The goal in the short or medium term is to evaluate the impacts on health. For this, according to WHO recommendations for population health, we have chosen a threshold of 50 ?g m-3. In fact, values greater than 50 ?g.m-3 are harmful to populations.