This work presents an assessment on the pollution levels in plant leaves from 5 selected sites, 4 in urban areas and one in a rural area. It was used an environmental magnetism study with particle biological collectors (Nerium oleander L., Quercus spp., Tilia spp. e Platanus spp.). The results pointed out the contrast between sites with high traffic and the countryside. When comparing the biological collectors, Quercus leaves had higher efficiency to accumulate particles, while Platanus leaves showed the lowest values