Passive sampling of SO2 and NO2 in ambient air in Dakar. Preliminary study, June 2005.

The Norwegian Institute for Air Research (NILU) is supporting the Conseil Exécutif des Transports Urbains de Dakar (CETUD) in establishing a Central Laboratory with an Air Quality Management System for Dakar. During the first mission, in May-June 2005, some passive samplers were located at 5 different sites in Dakar city to give the first indication of the levels of NO2 and SO2 in different microenvironments of the city (e.g. road side, urban background, industry area etc ). This preliminary study indicates that Dakar city is highly polluted since relatively high concentrations are measured under good dispersion conditions.