“…Dunkirk, the Greater Brussels and Vielsalm). We chose to report annual means from several monitored stations in the Greater Brussels (Bruxelles Environnement-IBGE, 2009; Thiessen et al, 1986) and in Lille (Anquez, 2008;Caron et al, 2003;Thomas et al, 1993), the closest monitored site to Dunkirk where atmospheric data were available for recent years only (Alleman et al, 2010;ATMO, 2010;Ledoux et al, 2009;Mbengue et al, 2014). Because Lille sites were not operational before 1984, we also reported mean lead concentrations from monitored sites located in Paris (AIRPARIF, 2013;Person et al, 1993).…”